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| author | giraffedata <giraffedata@9d0c8265-081b-0410-96cb-a4ca84ce46f8> | 2019-04-14 23:29:38 +0000 |
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| committer | giraffedata <giraffedata@9d0c8265-081b-0410-96cb-a4ca84ce46f8> | 2019-04-14 23:29:38 +0000 |
| commit | 97efa5ff63bc672cc6595ec4ada5a70e0b3edadc (patch) | |
| tree | bb9d5be7ca074d14656670bb71f589158ca5e6e4 | |
| parent | cccac719eb0aa34eb45054799d2ee36e74e5d37a (diff) | |
| download | netpbm-mirror-97efa5ff63bc672cc6595ec4ada5a70e0b3edadc.tar.gz netpbm-mirror-97efa5ff63bc672cc6595ec4ada5a70e0b3edadc.tar.xz netpbm-mirror-97efa5ff63bc672cc6595ec4ada5a70e0b3edadc.zip | |
miscellaneous update
git-svn-id: http://svn.code.sf.net/p/netpbm/code/userguide@3598 9d0c8265-081b-0410-96cb-a4ca84ce46f8
| -rw-r--r-- | pnmcrop.html | 22 |
1 files changed, 18 insertions, 4 deletions
diff --git a/pnmcrop.html b/pnmcrop.html index b156b1d8..ef5211f3 100644 --- a/pnmcrop.html +++ b/pnmcrop.html @@ -2,7 +2,7 @@ <HTML><HEAD><TITLE>Pnmcrop User Manual</TITLE></HEAD> <BODY> <H1>pnmcrop</H1> -Updated: 29 March 2019 +Updated: 14 April 2019 <BR> <A HREF="#index">Table Of Contents</A> @@ -68,8 +68,18 @@ with <B>-sides</B>. <P>By default, <B>pnmcrop</B> chops off any stripe of background color it finds, on all four sides. You can tell <B>pnmcrop</B> to remove only specific borders with the <B>-left</B>, <B>-right</B>, -<B>-top</B>, and <B>-bottom</B> options. - + <B>-top</B>, and <B>-bottom</B> options. + +<p>But note that <b>pnmcrop</b>'s determination of the background color is +independent of which edges you crop, which may not be intuitive. For example, +imagine an image with a blue border at the top and a black border at the +bottom and you say to crop the bottom (<b>-bottom</b>). You may have expected +to crop the black border, but you actually won't crop anything, +because <b>pnmcrop</b> considers the background color to be whatever color the +top two corners are, which is blue, and there is no blue at the bottom of the +image. If you do want <b>pnmcrop</b> to take the background color from the +edges being cropped, use <B>-bg-corner</B>. + <p>If you want to leave some border, use the <b>-margin</b> option. It will not only spare some of the border from cropping, but will fill in (with what <b>pnmcrop</b> considers the background color) if necessary @@ -310,7 +320,7 @@ The output is a single line per image, like in this example: <li>The color <b>pnmcrop</b> took to be the background color, like "rgb-255:10/0/255" (This is a format recognized by - the <a href="libnetpbm_image.html#colorname"><b>pnm_parsecolor()</b> + the <a href="libnetpbm_image.html#colorname"><b>pnm_parsecolor()</b></a> library routine). The maxval in the color specification is the maxval of the image. @@ -318,6 +328,8 @@ The output is a single line per image, like in this example: used, in floating point decimal. </ol> +<p>You cannot use <b>-borderfile</b> together with this option. + <p>This option was new in Netpbm 10.86 (March 2019). <dt><b>-reportsize</b> @@ -325,6 +337,8 @@ The output is a single line per image, like in this example: This is like <b>-reportfull</b>, but reports only the left, right, top, bottom, width, and height. +<p>You cannot use <b>-borderfile</b> together with this option. + <p>This option was new in Netpbm 10.86 (March 2019). <DT><B>-verbose</B> |