Convert JPEG to PPM

JPEG, short for Joint Photographic Experts Group, is a widely-used image file format for compressing digital photographs. Established in 1992 by the Joint Photographic Experts Group, it revolutionized digital imagery by providing efficient, lossy compression that maintains significant image quality. Primarily used in digital cameras, web graphics, and image sharing, JPEG files support full-color imaging with 24-bit depth, enabling detailed and high-quality photographs in relatively small file sizes.

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.