Convert PNM to JPM

The PNM (Portable Anymap) file extension, developed by Jef Poskanzer in the 1980s, stands for Portable Any Map. It is an uncompressed raster graphics format designed for portable image storage and exchange, encompassing three sub-formats: PBM (Portable Bitmap), PGM (Portable Graymap), and PPM (Portable Pixmap). PNM files store image data in plain text or binary format, ensuring easy usage across different platforms and applications. This format is widely supported by various image editing software and is valued for its simplicity and lossless compression.

The JPM file extension stands for JPEG 2000 Compound Image File Format. It is used for storing multiple images and graphics, incorporating JPEG 2000 compression to achieve high-quality visuals with reduced file sizes. JPM files are particularly useful in scenarios that require efficient storage and handling of complex image data, such as digital archiving, medical imaging, and document management. Developed as part of the broader JPEG 2000 standard, the JPM format was introduced to enhance image quality and compression over its predecessor, JPEG. Its support for transparency, layers, and metadata makes it a versatile choice in professional IT and imaging applications.