Convert WMZ to PGM

The WMZ file extension stands for Compressed Windows Metafile, a format developed by Microsoft to store vector graphics in a compressed form using Gzip compression. Initially used in older Microsoft Office documents to optimize file sizes for embedded images, WMZ files have become less common with the advent of more modern formats like EMF. These files can be decompressed using utilities like WinZip or 7-Zip, and the resulting WMF files can be viewed or edited in applications such as Microsoft Office and Adobe Illustrator.

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.