BMPtoPGM

Description

Classic C code for converting a BMP (bitmap image) image to PGM (portable graymap) file format. The code can successfully convert 1-channel, 24-bit bitmap images to its .pgm format.

Running instructions

Compile the imageio.c file using C compiler and execute the binary file in terminal.

Sample inputs and outputs are present in input and output directory respectively.

Terminal View

Sample runs

• Pure 1-Channel, 24-Bit Image

  

• 3-Channel, 24-Bit Image

  

Note

• Representations above are made in formats viewable in browsers. Actual images present in output directory

• 3-Channel, 24-Bit Image changes to 1-Channel at line:87 in file:imageio.c. Please make changes accordingly for specific channel output.

  for red channel: fwrite(&((image+i*width+j)->r),1,sizeof(unsigned char),fp);
  
  for green channel: fwrite(&((image+i*width+j)->g),1,sizeof(unsigned char),fp);
  
  for blue channel: fwrite(&((image+i*width+j)->b),1,sizeof(unsigned char),fp);