From e7e90b72fd3161c5d55fed49e100781dfa3e9408 Mon Sep 17 00:00:00 2001 From: Mattia Rizzolo Date: Fri, 3 Oct 2014 14:05:01 +0000 Subject: Imported Upstream version 0.84 --- doc/sane-xsane-enhancement-doc.html | 101 ------------------------------------ 1 file changed, 101 deletions(-) delete mode 100644 doc/sane-xsane-enhancement-doc.html (limited to 'doc/sane-xsane-enhancement-doc.html') diff --git a/doc/sane-xsane-enhancement-doc.html b/doc/sane-xsane-enhancement-doc.html deleted file mode 100644 index 32c1d05..0000000 --- a/doc/sane-xsane-enhancement-doc.html +++ /dev/null @@ -1,101 +0,0 @@ - - - - - - - - XSane - Enhancement - - -  -
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-Enhancement

-XSane uses a gamma table to do the following enhancement functions. If -the scanner supports a custom gamma table (and the option is enabled) XSane -uses the scanner internal gamma table with the scanner's maximum bit depth.
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- Gamma correction:
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The gamma correction is a non linear correction. Black keeps -black and white keeps white -
if the gamma value is greater than 1.0 the gray intensities -are brightned -
if the gamma value is smaller than 1.0 the gray intensities are darkend
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- Brightness:
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positive values increase the brightness of the image. All values -are increased by the same value. 100% means a shift of the half value range -(on 8 bits (256 values) this means a shift of 128).
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- Contrast:
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positive values increase the contrast of the image. Medium -gray keeps medium gray (8 bits: 128) -
-100% means that all colors become medium gray -
+100% means that the difference between a value and medium gray is -doubled
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- RGB default:
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if RGB default is activated, all values for the color components -(red, green and blue) are set to the default values (gamma=1.0, brightness=0%, -contrast=0%). If you deactivate it, you can set different enhancement values -for each color.
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- Negative:
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This option inverts the intensities (black <-> white). -It is for scanning negatives. -

Negatives do not only have inverted colors, it also is necessary -to do a color correction for each color component because the negatives -have very different color ranges for each color.

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- Autoenhancement:
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If you press this button XSane tries to set good values -for brightness, contrast and gamma correction independance of the selected -part in the preview window. This does work quiet well for brightness and -contrast, but the gamma correction normally has to be corrected manually. -
If RGB default is disabled, the components for each color are set -individually.
- - Enhancement default: -
Sets the enhancement values to default: gamma=1.0, brightness=0%, -contrast=0%.
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- Restore enhancement:
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Restores the enhancement values from preferences.
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- Store enhancement (Memory):
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tore selected enhancement values to preferences.
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INDEX
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