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| author | Mattia Rizzolo <mattia@mapreri.org> | 2014-10-03 14:04:58 +0000 |
|---|---|---|
| committer | Mattia Rizzolo <mattia@mapreri.org> | 2014-10-03 14:04:58 +0000 |
| commit | 2d113e8792747151bf5d830f1a1485f2f951f940 (patch) | |
| tree | f29e273d53fe5735cdac171504d798bf45ea2007 /doc/sane-xsane-enhancement-doc.html | |
Imported Upstream version 0.50upstream/0.50
Diffstat (limited to 'doc/sane-xsane-enhancement-doc.html')
| -rw-r--r-- | doc/sane-xsane-enhancement-doc.html | 101 |
1 files changed, 101 insertions, 0 deletions
diff --git a/doc/sane-xsane-enhancement-doc.html b/doc/sane-xsane-enhancement-doc.html new file mode 100644 index 0000000..32c1d05 --- /dev/null +++ b/doc/sane-xsane-enhancement-doc.html @@ -0,0 +1,101 @@ +<!doctype html public "-//w3c//dtd html 4.0 transitional//en"> +<html> +<head> + <meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1"> + <meta name="GENERATOR" content="Mozilla/4.6 [en] (X11; I; Linux 2.2.11 i586) [Netscape]"> + <meta name="Author" content="Oliver Rauch"> + <meta name="Description" content="scan, photocopy and fax frontend for SANE"> + <title>XSane - Enhancement</title> +</head> +<body text="#000000" bgcolor="#FFFFFF" link="#0000EF" vlink="#51188E" alink="#FF0000"> + +<dd> +<img SRC="xsane-logo2.jpg" height=150 width=128 align=LEFT></dd> + +<br> +<blockquote> +<h1> +<u><font color="#009900">Enhancement</font></u></h1> +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.</blockquote> + +<center><img SRC="sane-xsane.jpg" height=416 width=270></center> + +<blockquote> +<dt> +<img SRC="gamma.jpg" height=21 width=22><a NAME="GAMMA"></a><b> Gamma correction:</b></dt> + +<blockquote>The gamma correction is a non linear correction. Black keeps +black and white keeps white +<blockquote>if the gamma value is greater than 1.0 the gray intensities +are brightned +<br>if the gamma value is smaller than 1.0 the gray intensities are darkend</blockquote> +</blockquote> + +<dt> +<img SRC="brightness.jpg" height=21 width=22><a NAME="BRIGHTNESS"></a><b> Brightness:</b></dt> + +<blockquote>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).</blockquote> + +<dt> +<img SRC="contrast.jpg" height=21 width=22><a NAME="CONTRAST"></a><b> Contrast:</b></dt> + +<blockquote>positive values increase the contrast of the image. Medium +gray keeps medium gray (8 bits: 128) +<blockquote>-100% means that all colors become medium gray +<br>+100% means that the difference between a value and medium gray is +doubled</blockquote> +</blockquote> + +<dt> +<img SRC="rgb-default.jpg" height=26 width=26><a NAME="RGB_DEFAULT"></a><b> RGB default:</b></dt> + +<blockquote>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.</blockquote> + +<dt> +<img SRC="negative.jpg" height=26 width=26><a NAME="NEGATIVE"></a><b> Negative:</b></dt> + +<blockquote>This option inverts the intensities (black <-> white). +It is for scanning negatives. +<p>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.</blockquote> + +<dt> +<img SRC="autoenhance.jpg" height=26 width=26><a NAME="AUTO_ENHANCEMENT"></a><b> Autoenhancement:</b></dt> + +<blockquote>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.</b> +<br>If RGB default is disabled, the components for each color are set +individually.</blockquote> + +<img SRC="default.jpg" height=26 width=26><a NAME="ENHANCEMENT_DEFAULT"></a><b> Enhancement default:</b> +<blockquote>Sets the enhancement values to default: gamma=1.0, brightness=0%, +contrast=0%.</blockquote> + +<dt> +<img SRC="restore.jpg" height=26 width=26><a NAME="RESTORE_ENHANCEMENT"></a><b> Restore enhancement:</b></dt> + +<blockquote>Restores the enhancement values from preferences.</blockquote> + +<dt> +<img SRC="store.jpg" height=26 width=26><a NAME="MEMORY_ENHANCEMENT"></a><b> Store enhancement (Memory):</b></dt> + +<blockquote>tore selected enhancement values to preferences.</blockquote> +</blockquote> + +<center> +<hr WIDTH="100%"> +<br><b><a href="../../c/sane/xsane/doc/sane-xsane-doc.html">INDEX</a></b></center> + +<p><br> +</body> +</html> |