pnmtopng(1): convert PNM image to PNG

The dcmj2pnm utility reads a DICOM image, converts the pixel data according to the selected image processing options and writes back an image in the well-known ...

But by forcing the conversion to to PNG to think it is already linear, then it won't make the PNG sRGB. Do that by adding -set colorspace RGB.

I recently finished the raytracing tutorial Ray Tracing in One Weekend, which outputs to PPM. I'm trying to convert to PNG to share my results ...

I wrote a C++ program that produces very high resolution pictures (fractals). I use fstream to save all the data in a .ppm file. Everything works fine.

I was wondering if there is a quick way to convert a given image to a PPM image that is in version P3. The convert command returns it in P6 by ...

In Linux I am getting .PPM files as the image format, this needs to be converted to PNG and then saved. I was looking at some API's to achieve this conversion ...

The command you need is: convert -resize 640x360-! -crop 640x240+0+60 filename.jpg filename_crop.ppm. The -! in the -resize command is used ...

Example. If I convert a PNG file to a PPM file using mogrify I get the following: convert blah.png to blah.ppm: mogrify -format ppm blah.png.

Produces a Portable Network Graphics file as output. Color values in PNG files are either eight or sixteen bits wide, so pnmtopng will automatically scale ...

This program is part of Netpbm(1). pnmtopng reads a PNM image as input and produces a PNG image as output.