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| author | giraffedata <giraffedata@9d0c8265-081b-0410-96cb-a4ca84ce46f8> | 2020-03-22 01:54:12 +0000 |
|---|---|---|
| committer | giraffedata <giraffedata@9d0c8265-081b-0410-96cb-a4ca84ce46f8> | 2020-03-22 01:54:12 +0000 |
| commit | 895e9c3897d592b7df1c579a9522185c826c3a36 (patch) | |
| tree | 2dec329e3a6ab73aaac39b52a0acde8ea32e0f64 | |
| parent | d9bbf089cc1180650c6222cc4ce98c89c9ccb8b9 (diff) | |
| download | netpbm-mirror-895e9c3897d592b7df1c579a9522185c826c3a36.tar.gz netpbm-mirror-895e9c3897d592b7df1c579a9522185c826c3a36.tar.xz netpbm-mirror-895e9c3897d592b7df1c579a9522185c826c3a36.zip | |
miscellaneous update
git-svn-id: http://svn.code.sf.net/p/netpbm/code/userguide@3769 9d0c8265-081b-0410-96cb-a4ca84ce46f8
| -rw-r--r-- | pamcut.html | 23 | ||||
| -rw-r--r-- | pamditherbw.html | 2 | ||||
| -rw-r--r-- | pnmshear.html | 8 |
3 files changed, 17 insertions, 16 deletions
diff --git a/pamcut.html b/pamcut.html index 9f0666c8..c0016b37 100644 --- a/pamcut.html +++ b/pamcut.html @@ -87,18 +87,17 @@ read, more expressive, and allow you to use defaults. <P>If you use both options and arguments, the two specifications get mixed in an unspecified way. -<P>To use arguments, specify all four of the <I>left</I>, -<I>top</I>, <I>width</I>, and <I>height</I> arguments. <I>left</I> -and <I>top</I> have the same effect as specifying them as the argument -of a <B>-left</B> or <B>-top</B> option, respectively. <I>width</I> -and <I>height</I> have the same effect as specifying them as the -argument of a <B>-width</B> or <B>-height</B> option, respectively, -where they are positive. Where they are not positive, they have the -same effect as specifying one less than the value as the argument to a -<B>-right</B> or <B>-bottom</B> option, respectively. (E.g. -<I>width</I> = 0 makes the cut go all the way to the right edge). -Before July 2000, negative numbers were not allowed for <I>width</I> -and <I>height</I>. +<P>To use arguments, specify all four of the <I>left</I>, <I>top</I>, +<I>width</I>, and <I>height</I> arguments. <I>left</I> and <I>top</I> have +the same effect as specifying them as the argument of a <B>-left</B> or +<B>-top</B> option, respectively. <I>width</I> and <I>height</I> have the +same effect as specifying them as the argument of a <B>-width</B> or +<B>-height</B> option, respectively, where they are positive. Where they are +not positive, they have the same effect as specifying one less than the value +as the argument to a <B>-right</B> or <B>-bottom</B> option, respectively. +(E.g. <I>width</I> = 0 makes the cut go all the way to the right edge). +Before July 2000, negative numbers were not allowed for <I>width</I> and +<I>height</I>. <P>Input is from Standard Input if you don't specify the input file <I>pnmfile</I>. diff --git a/pamditherbw.html b/pamditherbw.html index c1f0bacf..5491a6f1 100644 --- a/pamditherbw.html +++ b/pamditherbw.html @@ -47,7 +47,7 @@ just takes the first channel of whatever you give it and treats it as if it represented gray levels). <p>The output is a PAM with tuple type BLACKANDWHITE. You can turn -this into a PBM (if you need to use it with an older program doesn't +this into a PBM (if you need to use it with an older program that doesn't understand PAM) with <b>pamtopnm</b>. <P>To do the opposite of dithering, you can usually just scale the image diff --git a/pnmshear.html b/pnmshear.html index 4ff36304..abdff36f 100644 --- a/pnmshear.html +++ b/pnmshear.html @@ -2,7 +2,7 @@ <HTML><HEAD><TITLE>Pnmshear User Manual</TITLE></HEAD> <BODY> <H1>pnmshear</H1> -Updated: 27 November 2006 +Updated: 22 March 2020 <BR> <A HREF="#index">Table Of Contents</A> @@ -48,8 +48,10 @@ If the angle is negative, it shears the other way: +-------+ +-------+ </PRE> -The angle should not get too close to 90 or -90, or the resulting -image will be unreasonably wide. +The angle should not get too close to 90 or -90, or the resulting image will +be unreasonably wide. In fact, if it gets too close, the width will be so +large that <b>pnmshear</b> cannot do computations in the word sizes it uses, +and the program detects this and fails. <P><b>pnmshear</b> does the shearing by looping over the source pixels and distributing fractions to each of the destination pixels. This |