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diff --git a/pgmmedian.html b/pgmmedian.html index e0f20b36..3c90f6a7 100644 --- a/pgmmedian.html +++ b/pgmmedian.html @@ -2,7 +2,7 @@ <html><head><title>Pgmmedian User Manual</title></head> <body> <h1>pgmmedian</h1> -Updated: 28 August 2005 +Updated: 20 January 2022 <br> <a href="#index">Table Of Contents</a> @@ -41,6 +41,11 @@ the output is the median of a certain set of pixels in the neighborhood of the corresponding input pixel. The effect is to eliminate locally extreme values. Such pixels typically show up as speckles. +<p>Pixels at the edges of the image, pixels where the convolution kernel would +go off the edge of the image, are just copied. For example, if <b>-height</b> +is 9, the first 4 and last 4 rows of the input image are just copied to the +output. + <p>See the <b>-type</b> and <b>-cutoff</b> options for information on how <b>pgmmedian</b> chooses between the two methods. @@ -73,12 +78,16 @@ value. <dd>Width of the median mask to apply. +<p>Maximum allowed is the width of the input image. + <p>Default is 3. <dt><b>-height=</b><i>n</i> <dd>Height of the median mask to apply. +<p>Maximum allowed is the height of the input image. + <p>Default is 3. <dt><b>-type</b> <i>median_type</i> |