Convert VDA to PGM

The VDA file extension, associated with Truevision Advanced Raster Graphics Adapter (TARGA), is a raster graphics file format developed by Truevision Inc. It was designed for high-color and true-color display on IBM-compatible PCs, supporting resolutions matching NTSC and PAL video formats. VDA files are used for digital photos, textures, and video editing, offering various color depths (8 to 32 bits) and alpha channel transparency. The format includes both lossless and lossy compression options, ensuring high-quality image preservation.

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.