PPM (Portable Pixmap) is an image format developed by Jef Poskanzer. It contains human-readable text with an image header and body. Usually, the header includes the image contents such as the maximum color value, number of rows and columns, and the P3, which defines the image format. The image body, on the other hand, entails the actual picture data in a series of RGB values.
TIFF (Tagged Image File Format) is a standard computer image file format used for saving raster graphic images. It was first developed for desktop publishing by Aldus Corporation, which was later acquired by Adobe Systems in 1994. Interestingly, TIFFs can store information in lossless format and also supports the LZW compression algorithm for reducing the file size.