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PlayStation Texture (TIM)
The native texture format of the PS1.
The TIM format is the standard image file format for the Sony PlayStation (PSX/PS1) console. It stores textures, sprites, and background images in a way that maps directly to the console's VRAM (Video RAM).
A TIM file contains a header (identifying the bits-per-pixel: 4-bit, 8-bit, 16-bit, or 24-bit) followed by optional CLUT (Color LookUp Table) data and then the pixel data. 4-bit and 8-bit modes use palettes. It includes 'STP' bits (Special Transparency Processing) which handled the PS1's unique semi-transparency modes.
Released in 1994 with the PlayStation SDK. It was the format for Final Fantasy VII backgrounds, Metal Gear Solid textures, and thousands of other games.
JPEG 2000 VM Uncompressed
A single-component test format for JPEG 2000 verification.
PGX is an extremely simple, uncompressed raster format created specifically for the development and testing of the JPEG 2000 standard (ISO 15444). It is defined in the JPEG 2000 Verification Model (VM). Its purpose is to store a single component (channel) of an image with potentially high bit depth and signed/unsigned values, without the complexity of a full image container.
A PGX file represents one image channel (grayscale). It starts with a minimalist text header identifying the endianness (`LMS` or `Big`), the sign (`+`/`-`), the bit depth, and dimensions. The raw pixel data follows immediately. It is effectively a raw dump of a single image plane.
Developed by the JPEG committee during the creation of JPEG 2000. It allowed researchers to test wavelet compression algorithms on raw data without worrying about file headers or color transforms.
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