| Syntax |
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ppmtopng --help
ppmtopng [-name iname] [name]
ppmtopng -alpha alpha [-name iname] [name]
ppmtopng -nz [-name iname] [name]
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| Synopsis |
| Convert a Portable PixMap (PPM) image to a Portable Network Graphics (PNG) image. |
| Options |
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--help | print the help message and exit. |
-name iname | set the image name in the output image to iname. |
-alpha alpha | set alpha channel for all pixels to the value given by alpha. The value can be given as a decimal, percentage or hexadecimal. |
-nz | set alpha channel to full on (0xff) for any non-zero value pixel in the input image. |
name | input image filename. If this is omitted the image will be read from standard input. |
|
| Description |
| Convert a Portable PixMap (PPM) image to a Portable Network Graphics (PNG) image.
The PNG image file is written to standard output.
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| Examples |
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ppmtopng -name "test" inp.ppm > out.png |
Convert PPM file inp.ppm to the PNG file out.png. Set the name of the image to "test".
ppmtopng -nz inp.ppm > out.png |
Convert PPM file inp.ppm to the PNG file out.png. The alpha channel is set to full on for any non-zero pixels in the input image.
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