/usr/share/doc/gri/html/Mask.html is in gri-html-doc 2.12.26-1build1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 | <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<title>Gri: `mask' command</title>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1"></head>
<body bgcolor="#FFFFFF" text="#000000" link="#0000EE" vlink="#551A8B" alink="FF0000">
<!-- newfile Mask.html "Gri: `mask' command" "Gri Commands" -->
<!-- @node Mask, New, Ls, List Of Gri Commands -->
<a name="Mask" ></a>
<img src="./resources/top_banner.gif" alt="navigation map" usemap="#navigate_top" border="0">
<table summary="top banner" border="0" cellspacing="0" cellpadding="0">
<tr>
<td width="150" valign="top">
<font size=-1>
<br>
Chapters:
<br>
<a href="Introduction.html">1: Introduction</a><br>
<a href="SimpleExample.html">2: Simple example</a><br>
<a href="InvokingGri.html">3: Invocation</a><br>
<a href="GettingMoreControl.html">4: Finer Control</a><br>
<a href="X-Y.html">5: X-Y Plots</a><br>
<a href="ContourPlots.html">6: Contour Plots</a><br>
<a href="Images.html">7: Image Plots</a><br>
<a href="Examples.html">8: Examples</a><br>
<a href="Commands.html">9: Gri Commands</a><br>
<a href="Programming.html">10: Programming</a><br>
<a href="Environment.html">11: Environment</a><br>
<a href="Emacs.html">12: Emacs Mode</a><br>
<a href="History.html">13: History</a><br>
<a href="Installation.html">14: Installation</a><br>
<a href="Bugs.html">15: Gri Bugs</a><br>
<a href="TestSuite.html">16: Test Suite</a><br>
<a href="GriInThePress.html">17: Gri in Press</a><br>
<a href="Acknowledgments.html">18: Acknowledgments</a><br>
<a href="License.html">19: License</a><br>
<br>
Indices:<br>
<a href="ConceptIndex.html"><i>Concepts</i></a><br>
<a href="CommandIndex.html"><i>Commands</i></a><br>
<a href="BuiltinIndex.html"><i>Variables</i></a><br>
</font>
<td width="500" valign="top">
<map name="navigate_top">
<area alt="index.html#Top" shape="rect" coords="5,2,218,24" href="index.html#Top">
<area alt="ListOfGriCommands.html#ListOfGriCommands" shape="rect" coords="516,2,532,24" href="ListOfGriCommands.html#ListOfGriCommands">
<area alt="Gri: `ls' command" shape="rect" coords="557,2,573,24" href="Ls.html">
<area alt="Gri: `new' command" shape="rect" coords="581,2,599,24" href="New.html">
</map>
<map name="navigate_bottom">
<area alt="index.html#Top" shape="rect" coords="5,2,218,24" href="index.html#Top">
<area alt="Gri: `new' command" shape="rect" coords="581,2,599,24" href="New.html">
</map>
<h3>9.3.24: `<font color="#82140F"><code>mask</code></font>'</h3>
<!-- latex: \index{mask} -->
<TABLE SUMMARY="Example" BORDER="0" BGCOLOR="#efefef" WIDTH="100%">
<TR>
<TD>
<PRE>
<font color="#82140F">
`mask the image [to {uservalue .u.}|{imagevalue .i.}]'
</font></PRE>
</TD>
</TR>
</TABLE>
<p>
Examine both the image and the mask pixel by pixel. For any pixels
which have a mask value of 1 (which indicates an invalid region of the
image), change the image value. If no `<font color="#82140F"><code>to</code></font>' phrase is present,
change the image value to 0 in pixel units. If the
`<font color="#82140F"><code>to uservalue .u.</code></font>' phrase is present, change the pixel to hold the
imagevalue that
corresponds to this uservalue (see `<font color="#82140F"><code>set image range</code></font>' command for
a discussion of this correspondance). If the `<font color="#82140F"><code>to imagevalue .i.</code></font>'
phrase is present,
change the pixel to hold that imagevalue (in range 0 to 255 inclusive
for 8-bit images).
<p>
</table>
<img src="./resources/bottom_banner.gif" alt="navigation map" usemap="#navigate_bottom" border="0">
</body>
</html>
|