PPM (Portable Pixmap) is an uncompressed raster image format from the Netpbm family, representing images using plain text or binary encoding. It supports grayscale and color images with pixel values stored in ASCII or raw binary formats. PPM files have a simple header specifying width, height, and maximum color intensity, followed by pixel data, making them easily readable and convertible.
Extremely simple file structure, human-readable ASCII variant, platform-independent, supports wide color depth, easy to parse and generate, no complex compression overhead, ideal for algorithmic image processing and debugging.
Large file sizes due to lack of compression, inefficient storage, slow read/write performance, limited native support in consumer image software, not suitable for web or storage-constrained environments.
PPM is commonly used in scientific and technical imaging, computer vision research, graphics processing, and as an intermediate format for image conversion. It's frequently employed in academic and research environments for storing raw image data, supporting cross-platform image processing, and serving as a reference format for image manipulation algorithms.