Convert PPM to PCDS

The Portable Pixmap (PPM) file extension, an image format within the Netpbm family, stores simple, uncompressed images. Introduced in the late 1980s, PPM supports RGB color and grayscale images, making it suitable for basic image processing and conversion tasks. Its plain text encoding simplifies debugging and data manipulation, although its lack of compression results in larger file sizes compared to modern formats. As such, PPM finds limited use in contemporary applications, mainly in educational and experimental settings where ease of implementation and readability are prioritized.

The PCDS file extension stands for Photo CD Multi-resolution Bitmap Graphics, a format developed by Kodak in 1991 for digitizing and storing high-quality images on CDs. PCDS files were used to store scanned prints and slides, leveraging proprietary encoding to maintain image quality. This format was part of Kodak's Photo CD system, which aimed to provide a reliable method for archiving and accessing digital photographs.