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-setup-enhancement-doc.html | 195 ++++++++++++++++++++++++++++++ 1 file changed, 195 insertions(+) create mode 100644 doc/sane-xsane-setup-enhancement-doc.html (limited to 'doc/sane-xsane-setup-enhancement-doc.html') diff --git a/doc/sane-xsane-setup-enhancement-doc.html b/doc/sane-xsane-setup-enhancement-doc.html new file mode 100644 index 0000000..5827198 --- /dev/null +++ b/doc/sane-xsane-setup-enhancement-doc.html @@ -0,0 +1,195 @@ + + + + + + XSane - Enhancement setup + + + + + + + + + +
+XSane-logo + +
+

Enhancement setup

+
+
+ + +
+ + + + + + + + + +
+
+Index +
+
+
+Main window: + +
+Color correction: + +
+Standard options window +
+
+
+Advanced options window +
+
+
+Preview: + +
+Setup: + +		 +
+
+You open the setup window via the menu preferences/setup in the +main window of xsane. +
+
+
+
XSane-setup-enhancement-window
+
+
+

THRESHOLD OPTION:

+
+There are three options available: +
    +
  • Standard options window (lineart)
    • +
+
+The threshold option is kept untouched. If the backend makes +available a "threshold" option you find it in the standard or advanced +options window. You have to do a new preview scan to see changes of the +threshold value. +
+ +
    +
  • XSane main window (lineart)
    • +
+
+If the backend makes available a "threshold" option it is moved +to the main window. The value range is normalized (see +THRESHOLD MINIMUM, MAXIMUM, MULTIPLIER, OFFSET). +You have to do a new preview scan to see changes of the threshold value. +
+ +
    +
  • XSane main window (grayscale->lineart)
    • +
+
+If the backend makes available a "threshold" option it is moved +to the main window. The preview scan is done in grayscale mode (see +NAME OF GRAYSCALE SCANMODE) and transformed to black/white. Changes +of the threshold value are visible in the preview window without a new preview +scan. The value range of the threshold option is normalized (see +THRESHOLD MINIMUM, MAXIMUM, MULTIPLIER, OFFSET). +
+
+
+ +

THRESHOLD MINIMUM, MAXIMUM, MULTIPLIER, OFFSET:

+
+These values are used to make the threshold function of the +backends work the same way XSane does handle it. This is: +the threshold value defines the brightness level in % that is needed +to get a white point. A value of 0% creates a totally white image, a value +of 100% creates a totally black image. +
+If the threshold function of the backend does not cover the full range +(0-100% = white...black), you can reduce the range with the values MINIMUM +and MAXIMUM. If the backend defines another value range (e.g 0-255 ) you +have to enter a MULTIPLIER (2.55 for rang 0-255), with the OFFSET value +you can shift the range linear. +
+
+The calculation is: +
+backend_threshold = OFFSET + MULTIPLIER * xsane_threshold +
+where the user can select xsane_threshold in the range from MINIMUM to MAXIMUM. +
+ +

NAME OF GRAYSCALE SCANMODE:

+
+If you want to do a grayscale previewscan when lineart scanmode +is selected, you have to tell xsane the name of the grayscale mode. This +is because the scanmode is defined by the backend and differen backends +may use different names. You have to enter the original name (not translated) +case sensitive (take a look at the scanmode selection menu in the xsane +main window). +
+The name should be something like +
+Gray +
+ +
+
+ +
+ +
+Author: Oliver Rauch +
+ + + -- cgit v1.2.3