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| -rw-r--r-- | pamthreshold.html | 13 |
1 files changed, 9 insertions, 4 deletions
diff --git a/pamthreshold.html b/pamthreshold.html index e7586d7c..f93993ea 100644 --- a/pamthreshold.html +++ b/pamthreshold.html @@ -66,9 +66,9 @@ gray. <B>pamditherbw</B> does dithering. <H2 id="options">OPTIONS</H2> -<p>Without any options, <b>pamthreshold</b> uses an iterative -algorithm found in the <a -href="http://www.wikipedia.org/">wikipedia</a> article +<p>Without any options, <b>pamthreshold</b> uses a method based on the +iterative algorithm found in +the <a href="http://www.wikipedia.org/">wikipedia</a> article <a href="http://en.wikipedia.org/wiki/Thresholding_%28image_processing%29"> <i>Thresholding (image processing)</i></a> to compute the thresholding value. (<a @@ -80,6 +80,9 @@ telling you what threshold it used. (Netpbm messages go to Standard Error, and you can turn them off with the Netpbm common option <b>-quiet</b>). +<p>Options <b>-simple</b>, <b>-local</b>, and <b>-dual</b> select other +methods. + <DL COMPACT> <dt><b>-simple</b></dt> @@ -117,7 +120,9 @@ the Netpbm sample values, where 0 corresponds to black and 1 to the maxval of the image. <p>If you don't specify this option, <b>pamthreshold</b> uses a threshold -of 0.5. Without <b>-simple</b> or <b>-local</b> this option is +of 0.5. + +<p>Without <b>-simple</b>, <b>-local</b>, or <b>-dual</b>, this option is meaningless. <p>The meaning of the threshold depends upon the kind of thresholding |