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Increase the quality of your slide and negative scans from VueScan Professional with ColorPerfect! Find out more about how to scan with VueScan. ColorPerfect processes scans with color integrity and gives unprecedented flexibility in creative image editing. To harness the full potential of our Photoshop Plug-in it's important to obtain image data that has been subjected to as little processing as possible (RAW data). The following tutorial gives a step by step explanation on how to achieve this with VueScan Professional. Also watch our video tutorial on creating linear scans with Vuescan.
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Creating linear scans of slides and negatives with VueScan Professional
Hamrick Software's VueScan Professional is very well suited to create linear scans of slides and negatives since the professional version of VueScan features a special RAW output mode. To create suitable scans you first have to select the input tab and to choose either slide or color negative from the media pulldown list.
For both choices a negative is preserved as such in a RAW scan's linear output file. The difference between the two modes in combination with RAW scans is that for color negative mode the three color channels of a scan are being scaled up using suitable factors to ensure that all of these use the same range of values. Since Photoshop actually uses only 15 bit plus 1 value precision instead of the full 16 bit range used in a linear Tiff file that kind of scaling can be beneficial. If you are not using the advanced techniques of exposure control or analog gain detailed further down on this page you should choose color negative as your medium for negative scans. When scanning slides this mode could also be beneficial when scanning film with noticeable color casts. E.g. a daylight scene shot on tungsten film without filtration or vice versa.
Then select the required bit depth which is controlled by the setting 'Bits per pixel'. Set this to '48 bit RGB' which equals 16 bit per channel. The resolution of the scan is also being defined on the input tab. When scanning for archival purposes it is recommended that you use the full physical resolution your scanner is capable of. In the example screen shots a Nikon Super Coolscan LS 8000 is used which is able to scan at 4000 dpi. If your scanner supports multi sampling that may be used to further improve the scan's quality where needed. You can specify this under the 'Number of samples' option which is only visible if this feature is available for your hardware. Using multi sampling on color negatives is generally beneficial since the darkest areas of such transparencies contain a lot of important detail while any dark areas are especially prone to noise. The noise that occurs at random in a single sample scan can be reduced by taking multiple samples because such noise will not occur in the same places between different samples.
Putting out RAW Tiff files
Next select the output tab and deactivate the standard Tiff file output while activating RAW file output. Both modes write Tiff files. The normal Tiff files however are images edited and gamma encoded by VueScan while those of the RAW output mode are of linear gamma and are always equivalent to the light intensities read in by the scanner. That is the scan of a negative always remains a negative in a RAW output file and is therefore ideally suited for later conversion with ColorPerfect's ColorNeg mode or the original ColorNeg plug-in.
It is important that you do create linear Tiff files and not linear DNG files. It is not possible to open a DNG file with Photoshop without going through Adobe Camera RAW which does not allow linear output. The only way to open the unaltered linear data as saved by VueScan with Photoshop is by use of linear Tiff files. Therefore you need to make sure that the option 'RAW DNG format' is left unchecked.
If you have created such linear DNG files with VueScan by accident or in the past that is not a problem. You can convert large numbers of such files to the Tiff format using the freeware command line RAW converter dcraw. Command: dcraw -T -4 -D *.dng
Black and white (grayscale) linear scans
To create linear 16 bit grayscale scans generally follow the instructions of the two paragraphs above but instead of choosing 'Color Negative' for the Media setting on the Input tab choose 'B+W Negative'. Also make sure that the 'RAW file type' setting on the Output tab is set to Auto or '16 bit Gray'. For scanning black and white negatives ignore the following two paragraphs of this page. In particular make sure that the 'Infrared clean' feature on the Filter tab is disabled by setting it to None. The underlying technology does not work for black and white negative film because of its silver halide clusters being opaque to the infrared light source used - just as dust and scratches would be.
Removal of dust and scratches and putting out a suitable alpha channel if desired
If your scanner features a function to remove dust and scratches you can also put out the alpha channel produced by use of the respective infrared light source. To do so you have to set the RAW file type to '64 bit RGBI'. This kind of alpha channel can later be used in retouching an image. If you don't need this kind of data set the RAW file type to '48 bit RGB' instead. Dropshare 5 1 1 0.
If you want VueScan to remove dust and scratches automatically you can activate the option infrared cleaning which is located on the filter tab. Simply set this to the desired strength. To apply such corrections to RAW scans you additionally have to modify the setting 'RAW output with' on the output tab. The default for this is Scan which means that the RAW data is already being written to file during scanning. While doing so VueScan does not process the RAW data at all so that any settings you made on the filter tab are being ignored. If you specify Save instead of Scan the RAW data is written after the scan finishes and has been processed according to your settings on the filter tab. This mode is a bit slower but is required if you want VueScan to apply infrared cleaning to your linear Tiff files before saving them to disk.
Improving quality using exposure control and/or analog gain
The level of detail captured during scanning is of importance to the final image's quality. For some scanners further options that can be of interest are available on the input tab. This is the case if your scanner hardware supports variable exposure settings. If that is so check the option 'Lock exposure' and create a test scan using an arbitrary color negative. To observe the effect of your settings on the linear Tiff file choose slide from the media pull down list instead of choosing color negative as instructed above. This way VueScan will not scale the individual color channels and you can easily observe the effect of different exposure settings in Photoshop. Increase the exposure in a series of test scans and find the setting for which the data of the red color channel populates half to three fourths of the red channel's histogram in Photoshop.
Some scanners like Nikon's Coolscan models allow different exposure settings for the individual color channels. This is generally referred to as analog gain. With this tool you can reduce or even eliminate a color negative's orange mask at the time of scanning. In a typical color negative scan the red color channel is brightest. The green channel usually is more than 1 exposure value (EV) darker and the blue channel is 1 EV darker still. Canceling out these differences by suitable adjustments increases the level of detail captured. In VueScan analog gain values are not specified in terms of EVs but rather as factors. Start by setting Green to 2.5 and Blue to 4.0 for your test scan. As shown for an exemplary negative these settings should lead to roughly equally distributed data in the individual color channels' histograms. Should this not be the case find the right factors in further test scans. It is important that no clipping occurs at the right of the histograms and that you do leave some room so that no clipping will occur for other negatives either. If a bit of free space in the film holder next to a negative leads to a white area in your scan that is irrelevant of course. Populating somewhere above half of a linear scan's histogram bins is usually sufficient as the right half of the histogram represents just a single EV. Once you have found suitable exposure settings you can usually use the same settings on all negatives with a similar orange mask. A completely unexposed portion of the film base always is the brightest point in any negative scan. Only material with a significantly different mask will require different factors than those determined in these initial tests.
For modern scanners with a true 16 bit A/D converter adjusting the analog gain settings often has little impact on a negative's conversion since there will be enough detail even without doing this. If you don't use analog gain choose color negative from the media pull down list after you finish testing. For older scanners with 14 bit precision per channel or even only 12 bit analog gain adjustments can make a significant difference. If we consider that the blue channel of a negative scan contains the least detail we can observe that its precision can be increased to the level found in an unadjusted scan with 2 more bit per channel precision. Something to note in this context is that often the lamp's brightness can't be increased any further. For the Coolscan scanners the exposure time is being lengthened instead. It is conceivable that for other scanners the signal might be amplified electrically which is unlikely to work equally well. In any event using analog gain will require some tests.
Output tab
This tab lets you specify what types of files arewritten when scanning, and the file names and optionsfor these files.
The various measures of the image files produced willbe displayed in the status area at the bottom right ofthe VueScan window.
File naming and saving
The Output tab has several options to specify the name of the files VueScan produces. You may either type thefilename in directly, or click the '@' button to opena visual file and folder navigation window.
You may specify a default folder for all file operations,but filenames may also specify the path to a sub-folderof the default (a relative path), or even a completely different location (an absolute path).
VueScan can save multiple files at once. Forexample, you may want to save a high-resolution TIFF forarchiving purposes or later editing, and lower quality(and size) JPEG files for other purposes.
Auto-numbering
VueScan provides an auto-numbering feature that allowsyou to create unique filenames automatically. Depending on the taskyou are doing, VueScan can either use the next number in a series, orit can use the current frame number (as indicated inInput | Frame number) when creating a new filename.
This option is available and works the same for 'crop'files (scans that have been cropped and processed) inTIFF, JPEG, PDF and OCR text formats or 'scan' files that containthe raw, minimally processed output from the scanner.
If the '@' symbol is used in the file name, file namesin the form 'Scan-YYMMDD-0001+' are used (where YY isthe year, MM is the month, and DD is the day). Thelast digits are increased until an unused file name isfound.
Serial numbering with +
Insert a plus sign (+) anywhere in the filename after some digits in orderto instruct VueScan to add a number in that place if neededto create a new unique filename in the folder.VueScan will start counting from the number to the left of the plus sign.
VueScan finds the next available number by looking for files matching the pattern specified; one by one it addsone to the digit(s) in the name until it finds an unusedfilename. So if the pattern is 'crop0001+.tif' and the folder is empty, the first file will be 'crop0001.tif', the second 'crop0002.tif' and so on. You can start at anynumber (e.g. 'crop1001+.tif').
Note that if you delete a file from an existing numberedseries, the next file saved will fill the open position.This can be useful if you want to match file numbers withexposure frame numbers or other numerical indexes.
Add leading zeros to the starting number in order to 'reserve' having filenames of the same length.
If more than one plus sign (or equals sign) is specified, VueScan will ignore all but the last.
Using same file name as raw files with *
Use an asterix (*) for the output file name to causethe raw file name to be used. For instance, whenscanning raw files with different names that aren'tin numerical order, click the '@' button to the right ofthe Input | Files option, choose multiple file names,and when you batch scan these, the output files willhave the same file names as the input files, albeitin different folders and with different file extensions.
Frame numbering with =
Insert an equals sign (=) anywhere in the filename to instruct VueScan to insert the current value of Input | Frame numberwhen creating the file. If you save the same framemore than once VueScan will overwrite the previous file (seePrefs | Warn on overwrite).
If you specify a starting number, VueScan will add one less than the current frame number to the starting value. Forexample, if you specify 'crop0007=.tif' and the current framenumber is 2, the file written will be 'crop0008.tif' (7+2-1).
This feature allows you to match the exposure number printedon the film edge to the file number of the scan. Keep inmind that Input | Frame number will be relative to what thescanner thinks is a frame. Your film holder frame number mightrange from 1 to 6, so for each new strip of 6 exposures youscan, you can set the starting number in the filename.
Output | Default folder
Output | File type
Output | TIFF file
Output | TIFF file name
Output | TIFF size reduction
Output | TIFF multi page
Output | TIFF file type
Output | TIFF compression
Output | TIFF DNG format
Output | TIFF profile
Output | JPEG file
Output | JPEG file name
Output | JPEG size reduction
Output | JPEG multi page
Output | JPEG quality
Output | JPEG black/white
Output | JPEG profile
Output | PDF file
Output | PDF file name
Output | PDF size reduction
Output | PDF multi page
Output | PDF file type
Output | PDF compression
Output | PDF paper size
Output | PDF profile
Output | PDF OCR text
Output | OCR text file
Output | OCR text file name
Output | OCR text language
Output | OCR text multi page
Output | OCR text RTF format
Output | Index file
Output | Index file name
Output | Index frame
Output | Index width
Output | Index height
Output | Index margin
Output | Index across
Output | Raw file
Output | Raw file name
Output | Raw size reduction
Output | Raw file type
Output | Raw output with
Output | Raw save film
Output | Raw compression
Output | Raw DNG format
Output | Printed size
Output | Magnification (%)
Output | Printed dpi
Output | Printed width
Output | Printed height
Output | Description
Output | Copyright
Output | Date
Output | Watermark 1/2
Output | Caption 1/2
Output | Center captions
Output | Log file
Output | Log file max size (MB)
Output | Default folder
This is the folder where files are read and written by default.
All other file names on the Output tab, as well as Input | Fileswill use this folder, so full paths are not required in those fields.
Basic Option: This option is always displayed.
Output | File type
You can use this option to write scans in JPEG, PDF or TIFF format.If you select 'Custom', then you can select any combination offile types.
Basic Option: This option is displayed when using Basic options or Standard option.
Output | TIFF file
This enables writing the croppedand processed images to a TIFF file when scanning.
Professional Option: This option is displayed when using Professional options.
Output | TIFF file name
This specifies the name of the TIFF file to hold thecropped and processed images.
In addition to VueScan writing a specific file name, it can also automatically name your files in three waysby placing special characters in the filename. See the beginningof this section for information on how to use this auto-numberingfeature.
The default setting of this option is '@.tif', which isexpanded to 'Scan-YYMMDD-0001+.tif'.
Basic Option: This option is displayed whenOutput | TIFF file is set.
Output | TIFF size reduction
You can use this option to write files with a reduced number of pixels.For instance, if size reduction is set to 3, then every 3x3 block ofpixels in the image will be written as a single pixel, which is theaverage of these 9 pixels.
This option will reduce the resolution and size of the file produced.These values will be displayed in the status area at the bottom of the VueScan window.
However, this option produces better results than reducing the resolutionof the scan, as the averaging of multiple pixels results in a similarnoise reduction benefit as multi-sampling. See Input | Number of samplesand Input | Number of passes.
Professional Option: This option is displayed whenOutput | TIFF file is set.
Output | TIFF multi page
If set to 'On', this option will cause VueScan tocreate multi-page TIFF files. Each scan will be added as a new page.
If batch scanning with a document feeder, and if this option is set to'Blank page', a new file will be started if a blank page is detected(and the blank pages won't be saved).
If batch scanning with a a duplex document feeder, and if this optionis set to 'Front/Back', only the front and back of each page will besaved in each file.
Standard Option: This option is displayed when Output | TIFF file is set.
Output | TIFF file type
This option describes the resolution of the cropped TIFF file, in bits perpixel. It should normally be set to 24-bits per pixel, since many imageediting programs are unable to read TIFF files with higher bit depth thanthis.
If you select 8 bits or 16 bits, the file will be saved in black/white format.
Professional Option: This option is displayed whenOutput | TIFF file is set.
Output | TIFF compression
This specifies whether to use compression when writing the TIFF file.
TIFF compression will not cause any loss of image data. It willtake a little longer to read, and especially write, as the algorithm is computationally intensive, but can reduce total filesize by as much as 40%.
The default setting is 'Auto', which enables compression forfiles with 12 or fewer bits per sample and disables compressionfor files more bits per sample.
Professional Option: This option is displayed whenOutput | TIFF file is set and whenOutput | TIFF DNG format isn't set.
Output | TIFF DNG format
This specifies whether to write TIFF files in DNG(Digital Negative) format. This allows VueScan'sTIFF files to be read by the Adobe Camera Raw pluginor other programs that read DNG files.
Professional Option: This option is displayed whenOutput | TIFF file is set.
Output | TIFF profile
This specifies whether to embed an ICC color profile into the TIFF file.This is primarily useful if you're using Photoshop(TM). You canspecify the profile to use by settingColor | Output color space.
Professional Option: This option is displayed whenOutput | TIFF file is set.
Output | JPEG file
This enables writing the cropped and processed images to a JPEG filewhen scanning.
Professional Option: This option is displayed when using Professional options.
Output | JPEG file name
This specifies the name of the JPEG file to hold the cropped andprocessed images.
In addition to VueScan writing a specific file name, it can also automatically name your files in three waysby placing special characters in the filename. See the beginningof this section for information on how to use this auto-numberingfeature.
The default setting of this option is '@.jpg', which isexpanded to 'Scan-YYMMDD-0001+.jpg'.
Basic Option: This option is displayed whenOutput | JPEG file is set.
Output | JPEG size reduction
You can use this option to write files with a reduced number of pixels.For instance, if size reduction is set to 3, then every 3x3 block ofpixels in the image will be written as a single pixel, which is theaverage of these 9 pixels.
This option will reduce the resolution and size of the file produced.These values will be displayed in the status area at the bottom of the VueScan window.
However, this option produces better results than reducing the resolutionof the scan, as the averaging of multiple pixels results in a similarnoise reduction benefit as multi-sampling. See Input | Number of samplesand Input | Number of passes.
Professional Option: This option is displayed whenOutput | JPEG file is set.
Output | JPEG multi page
If set, this option will cause VueScan to append scans to the endof a JPEG file, padding the file with white pixels on the right ifnecessary.
This option is sometimes useful if scanning two-sided identitydocuments like driver's licenses, when scanning photographs withwriting on the back, or when scanning postcards.
If set to 'On', this option will cause VueScan tocreate multi-page JPEG files. Each scan will be added as a new page.
If batch scanning with a document feeder, and if this option is set to'Blank page', a new file will be started if a blank page is detected(and the blank pages won't be saved).
If batch scanning with a a duplex document feeder, and if this optionis set to 'Front/Back', only the front and back of each page will besaved in each file.
Professional Option: This option is displayed whenOutput | JPEG file is set.
Output | JPEG quality
This option controls the quality of the JPEGfile. Using 100 produces images with few visible JPEG artifacts,and 50 results in images with noticeable artifacts, but with muchsmaller sizes. The default value of 90 produces fairly small imageswith little visible degradation in image quality.
Even at the highest quality, JPEG files are smaller than compressedTIFF files by as much as 60%. This smaller size comes atthe cost of loss of image information. If you expect to be editingyour scans produced by VueScan (e.g. in Photoshop(TM)), or are digitally archiving your scans, JPEG is not a good choice. However, forweb, email, small size or inkjet printing, JPEG is by far more efficient and, at higher quality settings, virtually indistinguishable.
Professional Option: This option is displayed whenOutput | JPEG file is set.
Output | JPEG black/white
This enables writing the croppedand processed images to a monochrome JPEG file. If you'reworking with black/white film, this will produce files thatare smaller than color files.
Professional Option: This option is displayed whenOutput | JPEG file is set.
Output | JPEG profile
Leech 3 1 4 – complete control over your downloads. This specifies whether to embed an ICC color profile into the JPEG file.This is primarily useful if you're using Photoshop(TM). You canspecify the profile to use by settingColor | Output color space.
Professional Option: This option is displayed whenOutput | JPEG file is set.
Output | PDF file
This enables writing the cropped and processed images to a PDF filewhen scanning.
Professional Option: This option is displayed when using Professional options.
Output | PDF file name
This specifies the name of the PDF file to hold thecropped and processed images.
In addition to VueScan writing a specific file name, it can also automatically name your files in three waysby placing special characters in the filename. See the beginningof this section for information on how to use this auto-numberingfeature.
The default setting of this option is '@.pdf', which isexpanded to 'Scan-YYMMDD-0001+.pdf'.
Basic Option: This option is displayed whenOutput | PDF file is set.
Output | PDF size reduction
You can use this option to write fileswith a reduced number of pixels. For instance, if size reductionis set to 3, then every 3x3 block of pixels in the image will bewritten as a single pixel, which is the average of these 9 pixels.
This option will reduce the resolution and size of the file produced.These values will be displayed in the status area at the bottom of the VueScan window.
However, this option produces better results than reducing the resolutionof the scan, as the averaging of multiple pixels results in a similarnoise reduction benefit as multi-sampling. See Input | Number of samplesand Input | Number of passes.
Professional Option: This option is displayed whenOutput | PDF file is set.
Output | PDF multi page
This option is useful when you are scanning documents and want multiplepages stored in a single file.
If set to 'On', this option will cause VueScan tocreate multi-page PDF files. Each scan will be added as a new page.
If batch scanning with a document feeder, and if this option is set to'Blank page', a new file will be started if a blank page is detected(and the blank pages won't be saved).
If batch scanning with a a duplex document feeder, and if this optionis set to 'Front/Back', only the front and back of each page will besaved in each file.
Standard Option: This option is displayed whenOutput | PDF file is set.
Output | PDF file type
This option describes the resolution of thecropped PDF file, in bits per pixel. For PDF files, only1 bit per sample and 8 bits per sample images are written,and 1 sample per pixel and 3 samples per pixel imagesare written.
Professional Option: This option is displayed whenOutput | PDF file is set.
Output | PDF compression
This specifies whether to use compression when writing the PDF file.
PDF compression uses the JPEG format internally when writing PDF fileswith more than one bit per pixel. If this option is set to 'Maximum',additional JPEG compression is used (level 75) otherwise minimalJPEG compression is used (level 90).
Professional Option: This option is displayed whenOutput | PDF file is set.
Vuescan 9 6 33 Equals Many
Output | PDF paper size
This option describes the page size to be used in PDFfiles. If the image size is larger than the page size,then a larger page size is used, otherwise the imageis centered on the page.
Standard Option: This option is displayed whenOutput | PDF file is set.
Output | PDF profile
This specifies whether to embed an ICCcolor profile into the PDF file. This is primarily usefulif you're using Photoshop(TM). You can specify the profile touse by settingColor | Output color space.
Professional Option: This option is displayed whenOutput | PDF file is set.
Output | PDF OCR text
This option creates searchable PDF files. VueScan's Optical Character Recognition(OCR) feature detects where each word is located on the page, and overlaysthis text on top of the image of the page. You can then use the searchcapability of any PDF viewer to find the text within the PDF document.
This will also let your operating system index your PDF files so you canlook for documents based on the text within them.
Use the Output | OCR text languageoption to choose the language of the text. This will improvethe quality of non-English OCR. Only characters that are in thewindows-1252 character set (basically Western European languages)will be written to the PDF file.
Professional Option: This option is always displayed for flatbed scannersand when scanning microfilm.
Output | OCR text file
This Optical Character Recognition (OCR) feature writes the text from ascanned image to a normal text file that can be edited with any text editor.
Professional Option: This option is displayed when using Professional options.
Output | OCR text file name
This specifies the name of the OCR text file to hold thetext from the scanned image.
In addition to VueScan writing a specific file name, it can also automatically name your files in three waysby placing special characters in the filename. See the beginningof this section for information on how to use this auto-numberingfeature.
The default setting of this option is '@.txt', which isexpanded to 'Scan-YYMMDD-0001+.txt'.
Professional Option: This option is displayed whenOutput | OCR text file is set.
Output | OCR text language
This option selects the language of the text that's beingscanned. There's built-in support for English, and 32 additionallanguages can be downloaded from:
Professional Option: This option is displayed whenOutput | OCR text file is set.
Output | OCR text multi page
This option is useful when you are scanning documents and want theOCR text stored in a single file.
If set to 'On', this option will cause VueScan tocreate multi-page OCR text files. Each scan will be added as a new page.
If batch scanning with a document feeder, and if this option is set to'Blank page', a new file will be started if a blank page is detected(and the blank pages won't be saved).
If batch scanning with a a duplex document feeder, and if this optionis set to 'Front/Back', only the front and back of each page will besaved in each file.
Professional Option: This option is displayed whenOutput | OCR text file is set.
Output | OCR text RTF format
If set, this option will cause VueScan to write OCR text files in theRTF format (Rich Text Format) used by Microsoft Word as well as mostMac OS X and Linux word processors. This format preserves the locationof the text on the page that's scanned, along with the bold and italicsettings of the text.
Professional Option: This option is displayed whenOutput | OCR text file is set.
Output | Index file
This enables writing the croppedand processed images to an index file when scanning.
Vuescan 9 Serial Number
An index file contains thumbnail size copies of a set of images, for example a roll of film. Each cropped image is added to the index print from left to right, top to bottom.
After saving an image to the index file, the file is closedand opened again if another image is added.
Professional Option: This option is always displayed.
Output | Index file name
This specifies the name of the file tohold the index images. Index files are always saved as windowsbitmap (BMP) files.
Professional Option: This option is displayed whenOutput | Index file is set.
Output | Index frame
This option controls the placement of imagesin the index. If zero, the images are added from left to right,top to bottom; this is the default setting.
If set to a number greater than 0, the images are added at that frame position counting left to right, top to bottom. For example, if Index frame is set to 8 and Index across is set to 5, the image would be placed at the second row, third column.
If Index frame is set to a number greater than 0, it will beincreased by 1 after an image is saved to the index.
When is it really useful? When you want to replace one or more index images in an existing index file. For example if you want to change therotation of an image, or if you re-scan one strip of film within a roll.
Professional Option: This option is displayed whenOutput | Index file is set.
Output | Index width
This is the width of an index frame, in pixels.
Professional Option: This option is displayed whenOutput | Index file is set.
Output | Index height
This is the height of an index frame, in pixels.
Professional Option: This option is displayed whenOutput | Index file is set.
Output | Index margin
This is the margin around an index frame, in pixels.
Professional Option: This option is displayed whenOutput | Index file is set.
Output | Index across
This is the number of index frames across inan index file.
Professional Option: This option is displayed whenOutput | Index file is set. Anime studio pro 9 5 – create 2d vector animation.
Output | Raw file
This enables writing raw data from the scanner to a TIFF file.
The raw files are the result of the first of two stepsVueScan performs: 'scanning'. The second step is 'processing'. These steps are described in the topic 'How VueScan Works' in this User's Guide. By providing a mechanism to cleanly separate these two steps, VueScanprovides great flexibility and offers options not available inmost other scanner software.
You can perform the 'processing' step later by setting Input | Source to 'File'. This lets you rescan imageswith different settings, without needing to rescan the media.
When the raw file is written depends on the setting ofOutput | Raw output with.
Raw files are always stored as TIFF files and can therefore beexamined in image viewing and editing programs. Note, howeverthat the resolution of raw files (as specified inOutput | Raw file type) may be greater than some programs can read.
Little processing is done on raw files so they are a closerepresentation of exactly what the scanner has produced. Rawfiles will not be filtered nor will color settings be applied. Asa result, raw scans may look 'wrong'.
Raw files contain as much data as the scanner was able to producebefore any modifications may have been made, and are therefore goodfor archiving.
The image gamma value is 1.0 when there are two bytes (16-bits)per sample, and 2.2 when there is one byte (8-bits) per sample.Raw files saved with gamma 1.0 will look dark, but thisis normal.
The one exception to this is if Output | Raw output with isset to 'Save'. In this case, the infrared cleaning and grainreduction is also done before saving the raw scan files.
Professional Option: This option is displayed whenPrefs | Enable raw from disk is set or when not scanning froma file.
Output | Raw file name
This specifies the name of the TIFF file used to hold the raw datafrom the scanner.
As well as VueScan writing a specific file name for you, it can also automatically number your files in two waysby placing special characters in the filename. (See the beginningof this section for information on how to use this auto-numberingfeature.)
The default setting of this option is 'scan0001+.tif'.
Professional Option: This option is displayed whenOutput | Raw file is set.
Vuescan 9 6 33 Equals What
Output | Raw size reduction
You can use this option to write fileswith a reduced number of pixels. For instance, if size reductionis set to 3, then every 3x3 block of pixels in the image will bewritten as a single pixel, which is the average of these 9 pixels.
However, this option produces better results than reducing the resolutionof the scan, as the averaging of multiple pixels results in a similarnoise reduction benefit as multi-sampling. See Input | Number of samplesand Input | Number of passes.
This option may not be appropriate for use with raw files whenyour purpose is to archive the scanner's output. For most usersleave the value set at the default of 1 (no reduction).
If, however, you always scan at a high resolution and then use size TIFF/JPEG reduction when saving the crop file, Raw size reduction may be appropriate because it results in significantly smaller fileswhile still gaining the benefit of scanner noise reduction.
If you do use Raw size reduction, you probably will not want touse TIFF/JPEG size reduction later when scanning the raw file from disk.
Professional Option: This option is displayed whenOutput | Raw file is set.
Output | Raw file type
This option describes the resolution of theraw file, in bits per pixel. It should normally be set toAuto, which defaults to bits per pixel of the scanner.
Professional Option: This option is displayed whenOutput | Raw file is set.
Output | Raw output with
This specifies which operations inVueScan cause the raw scan data to be written to a file.
If set to 'Scan' (or 'Preview'), the raw file is written at thesame time as the scan (or preview). In this case, the raw filehas not had infrared cleaning or grain reduction applied.
Assuming that the preview is used primarily to prepare for thefinal scan, this option should normally be set to 'Scan' sothat the highest resolution raw image can be saved.
If set to 'Save', it is written at the same time as other filesare written (i.e. after a scan completes or when the Save buttonis pressed). In this case, the raw file has had infraredcleaning and grain reduction applied.
It's much faster to save the raw file at the same time as the scan,since writing the file is overlapped with scanning the data.
Professional Option: This option is displayed whenOutput | Raw file is set.
Output | Raw save film
If this option is set, then the film corrections are done before the rawfile is written.
The Output | Raw output with is alsoimplicitly set to 'Save', which means that the rotation and infraredcleaning are also applied to the raw file.
Professional Option: This option is displayed whenOutput | Raw file is set.
Output | Raw compression
This specifies whether to use compressionwhen writing the raw file.
Compression of the raw TIFF file will not cause any loss of image data. It will take a little longer to read, and especially write,as the algorithm is computationally intensive, but can reduce totalfile size by as much as 40%.
The default setting is 'Auto', which enables compression forfiles with 12 or fewer bits per sample and disables compressionfor files using more bits per sample.
Professional Option: This option is displayed whenOutput | Raw file is set and whenOutput | Raw DNG format isn't set.
Output | Raw DNG format
This specifies whether to write raw files in DNG(Digital Negative) format. This allows VueScan'sraw files to be read by the Adobe Camera Raw pluginor other programs that read DNG files.
These DNG format raw files can also be read by VueScanwhen you set Input | Source to 'File'.
Professional Option: This option is displayed whenOutput | Raw file is set.
Output | Printed size
Use this option to select the target sizeof the saved images. This is used to compute the resolutionof the saved TIFF, JPEG and PDF files. The dpi of the saved fileswill depend on the dpi produced by the scanner and the imagesize.
Note that 'Printed size' does not affect the number of pixels inthe image, so this setting does not affect the file size. 'Printed size' controls logically how far apart the pixels shouldbe displayed in order to fit within the bounds specified. Thisalso means that 'Printed size' does not instruct VueScan to resamplethe image.
Keep in mind that the effects of resolution may not be visible(or may be misrepresented), as a result of the resolution of yourmonitor or printer. A very high-resolution file cannot bedisplayed at a resolution higher then the monitor, so just because you see jagged lines does not mean the image will print poorly.
Standard Option: This option is always displayed.
Output | Magnification (%)
If the 'Printed size' is 'Scan size', you can increase theprinted size of the output file with this option.
This option divides the scanned dpi of the image by thisvalue, resulting in an increase in the printed size of theoutput file.
Professional Option: This option is displayed whenOutput | Printed size is set to 'Scan size'.
Output | Printed dpi
If 'Printed size' is 'Fixed dpi', you canspecify the dpi of the output file with this option. The printed size will be as large as needed to match the specifiedresolution and will retain the aspect ratio of the cropped scan.
Basic Option: This option is displayed whenOutput | Printed size is set to 'Fixed dpi'.
Output | Printed width
This sets the target width of thesaved images when the 'Printed size' option is set to 'Manual'.If set, the height will be calculated to retain the aspectratio of the cropped scan.
Standard Option: This option is displayed whenOutput | Printed size is set to 'Manual'.
Output | Printed height
This sets the target height of thesaved images when the 'Printed size' option is set to 'Manual'.If set, the width will be calculated to retain the aspectratio of the cropped scan.
Standard Option: This option is displayed whenOutput | Printed size is set to 'Manual'.
Output | Description
This field will be written to TIFF files and JPEG files asan EXIF field and in OCR text files at the top of the page.You can use it to indicate a one-line descriptionof the image being scanned.
Professional Option: This option is displayed when at leastone of the output files is enabled.
Output | Copyright
This field will be written to TIFF files and JPEG files asan EXIF field and in OCR text files at the top of the page.You should normally use 'Copyright 20XX Your Name'.
Professional Option: This option is displayed when at leastone of the output files is enabled.
Output | Date
This field will be written to TIFF files and JPEG files asan EXIF field indicating the date that the picture wastaken originally (not the date that it was scanned).
You can be quite flexible in specifying this date - any ofthe following formats will work: 1995, March 1997, 20030402,3/23/98, 1998:03:23, etc. If you're in the USA time zone,put the month before the day, otherwise put the day beforethe month. The best format to use is the ISO formatfor dates, YYYY:MM:DD.
The date is converted to the ISO date format of YYYY:MM:DD HH:MM:SSbefore putting it in the EXIF field in the TIFF and JPEG files.
Professional Option: This option is displayed when at leastone of the output files is enabled.
Output | Watermark 1/2
These fields will be overlaid on top of an image as a watermark.
Professional Option: This option is displayed when at leastone of the output files is enabled.
Output | Caption 1/2
These fields will be displayed as text at the bottom of JPEG, TIFF and PDF files.
The captions use black letters on a white background.The text is anti-aliased so it looks goodand can contain non-English letters (i.e. Cyrillic, Japanese, Chinese).A smaller font is used if if the caption is too long to fit.To disable a caption, set it to zero-length line.
This option is useful when scanning photos, slides and negatives to add infoand the captions eare easy to delete later with an image editor.
Basic Option: This option is displayed when at leastone of the output files is enabled.
Output | Center captions
Use this option to center captions below the image.Turn this option off to left-align captions.
Standard Option: This option is displayed when at leastone of the output files is enabled.
Output | Log file
If set to 'On', VueScan will log all data sentand received from the scanners to vuescan.log. This is primarilyfor debugging problems with scanners. You should only usethis feature if you want to send it with a bug report when ascanner isn't working properly and you suspect it may be a problemwith the way VueScan is controlling the scanner.
If set to 'All', VueScan will additionally add a record to vuescan.csvcontaining the time each scanned file was created and the name of the file saved.
Professional Option: This option is always displayed.
Output | Log file max size (MB)
The log file will be written until it grows to this size.You might need to increase this if the log file stops beforeyou're able to reproduce a problem.
Professional Option: This option is always displayed.
