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| author | giraffedata <giraffedata@9d0c8265-081b-0410-96cb-a4ca84ce46f8> | 2019-01-13 22:43:37 +0000 |
|---|---|---|
| committer | giraffedata <giraffedata@9d0c8265-081b-0410-96cb-a4ca84ce46f8> | 2019-01-13 22:43:37 +0000 |
| commit | f10af0d60f26d1e6b57c8c519773f5c40d36cdbd (patch) | |
| tree | 45ea23c9d3f3867dc9cf94ea2863b985685aeeca /ppmbrighten.html | |
| parent | 214ca4206eb4046a1fe7292c039569421b226eeb (diff) | |
| download | netpbm-mirror-f10af0d60f26d1e6b57c8c519773f5c40d36cdbd.tar.gz netpbm-mirror-f10af0d60f26d1e6b57c8c519773f5c40d36cdbd.tar.xz netpbm-mirror-f10af0d60f26d1e6b57c8c519773f5c40d36cdbd.zip | |
miscellaneous update
git-svn-id: http://svn.code.sf.net/p/netpbm/code/userguide@3500 9d0c8265-081b-0410-96cb-a4ca84ce46f8
Diffstat (limited to 'ppmbrighten.html')
| -rw-r--r-- | ppmbrighten.html | 14 |
1 files changed, 9 insertions, 5 deletions
diff --git a/ppmbrighten.html b/ppmbrighten.html index b2e450ac..7229bd64 100644 --- a/ppmbrighten.html +++ b/ppmbrighten.html @@ -2,7 +2,7 @@ <HTML><HEAD><TITLE>Ppmbrighten User Manual</TITLE></HEAD> <BODY> <H1>ppmbrighten</H1> -Updated: 26 October 2012 +Updated: 12 January 2019 <BR> <A HREF="#index">Table Of Contents</A> @@ -78,6 +78,11 @@ For <em>decreasing</em> brightness, <b>pamfunc</b> should do the same thing as color of each pixel to bring it a specified per centage closer to white. This increases the value and saturation. +<p><b>pambrighten</b> is the same as <b>ppmbrighten</b>, except that it +recognizes the various Netpbm image formats rather than treating them all as +PPM. The output format is the same as the input format and extra channels in +a PAM image (such as a transparency channel) get passed through. + <p>If you want to modify the Hues in the image, use <b>pamhue</b>. @@ -108,10 +113,8 @@ to change the Saturation of each pixel. It may be negative. <DT><b>-normalize</b> -<DD>This option causes <b>ppmbrighten</b> to linearly remap the Values -of the pixels to cover the range 0 to 1. The option name is wrong -- -this operation is not normalization (it was named in error and the -name has been kept for backward compatibility). +<DD>This option causes <b>ppmbrighten</b> to normalize contrast by linearly +remapping the Values of the pixels to cover the range 0 to 1. <p><b>ppmbrighten</b> applies the brightening that you specify with the <b>-value</b> option <em>after</em> the remapping. @@ -128,6 +131,7 @@ with a bogus error message. <A HREF="ppmdim.html">ppmdim</A>, <A HREF="pamfunc.html">pamfunc</A>, <A HREF="ppmflash.html">ppmflash</A>, +<A HREF="ppmflash.html">pambrighten</A>, <A HREF="pamaltsat.html">pamaltsat</A>, <A HREF="pamdepth.html">pamdepth</A>, <A HREF="pnmgamma.html">pnmgamma</A>, |