Convert HEIC to PGM

The High Efficiency Image Container (HEIC) is a file extension used to store images and image sequences, leveraging the High Efficiency Image Format (HEIF). Developed by the Moving Picture Experts Group (MPEG) and introduced in 2015, HEIC files are acclaimed for their superior compression efficiency, which allows for high-quality images at smaller file sizes. This format is widely used in modern digital devices, including smartphones and cameras, to optimize storage capacity without compromising image quality. It supports advanced features such as live photos, burst photo sequences, and transparent images, making it integral for contemporary digital imaging solutions.

The Portable Graymap (PGM) file extension, originating in the late 1980s as part of the Netpbm project, stands for "Portable Gray Map". It serves as a simple, versatile format for grayscale images, enabling easy reading and writing by various programs. Due to its straightforward structure and plain text encoding, it's often used in academic and research settings where ease of parsing and accessibility are crucial. PGM files store grayscale images in a compact, efficient manner, making them an essential tool for image processing tasks.