A simple PPM image converter program written in C.
This program uses a command line interface and allows users to convert to and from the binary and ascii PPM formats (P3 and P6). By allowing the user to specify the input file, the output file, and the desired format, the program is able to parse and convert any P3 or P6 file.
The program also features robust error handling for both the command line parameters and the PPM image format.
Get a local copy of the repository by downloading the zip or using git clone. This includes a makefile which allows you to simply make the project as long as you are in a UNIX-like environment.
Then, depending on your operating system/environment, you can run the program by using one of the following commands:
./ppmrw.exe 3 input.ppm output.ppm
ppmrw 3 input.ppm output.ppm
The following ASCII PPM image (P3) was ran through the program and converted to the adjacent binary PPM image (P6).
- A PPM file with a valid header but incomplete/missing pixel data will create a valid PPM file of the requested format, but the pixel data will simply be filled with 0's. This results in an all black image of the height and width outlined in the input header.
- When converting any format to P6, my home computer creates an image in which the pixel colors are all offset, creating a warped image, but my work computer converts the image properly. This is why I've included an example of P3 -> P6 that was taken from my work computer, to demonstrate.
Peter Huettl - ph289@nau.edu