Convert PNM to PCD

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 PCD (Photo CD) file extension, developed by Kodak, is used for storing digital images on a Photo CD. This format was introduced in the early 1990s to digitize and archive physical photographs. PCD files contain high-resolution images scanned from film, typically at resolutions of 3072 x 2048 pixels or higher. These files are utilized for preserving, viewing, and editing images using compatible software. The PCD format supports 24-bit color and includes multiple resolutions within a single file, facilitating versatile image processing and archival purposes.