Convert wbmp to pgm

What is the difference between .wbmp and .pgm?

Description: The WBMP (Wireless Bitmap Image) file format is a monochrome graphics format optimized for mobile computing devices with limited display capabilities. It was developed for use in the early days of mobile internet to display images on mobile phones and other wireless devices with minimal processing power and storage. WBMP files contain bitmap images that are typically small and use a black and white color palette, making them highly efficient for fast loading times and minimal data usage.; A PGM file is a grayscale image file saved in the portable gray map (PGM) format and encoded with one or two bytes (8 or 16 bits) per pixel. It contains header information and a grid of numbers that represent different shades of gray from black (0) to white (up to 65,536). PGM files are typically stored in ASCII text format, but also have a binary representation.