Manual Reference Pages - RLESPIFF (1)
rlespiff - Use simple contrast enhancement to "spiff up" an image.
blacklevel ] [
-s ] [
threshold ] [
whitelevel ] [
outfile ] [
Rlespiff "spiffs up" an
image by stretching the contrast range so that the darkest pixel maps
to black and the lightest to white. If the
-s flag is given, the color channels will be treated separately. This
will likely cause some drastic color shifts.
-b blacklevel |
The darkest input pixel will map to this pixel value in the
output image. The default is 0.
If specified, each color channel will be mapped separately.
-t threshold |
This argument controls the number of samples of a pixel value that
should be considered insignificant (and will therefore be ignored).
It is specified in pixels/million. A threshold of 4 applied to a
512x512 image would mean that any value that existed at only one pixel
would be ignored. The default value is 10.
-w whitelevel |
The lightest input pixel will map to this pixel value in the output
image. The default is 255.
-o outfile |
If specified, the output will be written to this file. If
outfile is "-", or if it is not specified, the output will be written to the
standard output stream.
The input will be read from this file. If
infile is "-" or is not specified, the input will be read from the standard
Spencer W. Thomas
|1 ||RLESPIFF (1) ||June 12, 1990 |
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