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Panasonic Lumix RAW
The raw format for Lumix G and S series cameras.
RW2 is the proprietary raw image format used by Panasonic Lumix cameras, ranging from the Micro Four Thirds G-series (GH5, G9) to the full-frame S-series (S1, S5). RW2 files contain the raw sensor data. Like Olympus ORF files, they rely heavily on embedded lens correction profiles to correct the distortion and vignetting inherent in compact lens designs.
RW2 files are TIFF-based containers storing 12-bit or 14-bit sensor data. They include a large JPEG preview and extensive metadata describing the lens characteristics.
Replaced the older .RAW extension used by very early Panasonic cameras. It has been the standard for over a decade.
Targa ICB
A legacy extension for Targa images created by Truevision ICB boards.
The ICB file extension is functionally identical to the standard TGA (Truevision Targa) format. It was specifically used to denote images created by or for the Truevision Image Capture Board (ICB). Like standard TGA files, it supports simpler raster data with optional RLE compression and alpha transparency.
An ICB file respects the TGA 2.0 specification. It contains a header defining image dimensions and pixel depth, followed by pixel data. The pixel data can be uncompressed or RLE-compressed. It supports bit depths of 8, 16, 24, and 32 bits. In 32-bit mode, 8 bits are dedicated to an alpha channel, which was a pioneering feature for video overlay graphics.
Truevision (now part of Avid) introduced the Targa video boards for IBM PC-compatibles in the 1980s. To distinguish files created by different hardware models, they used specific extensions: .tga (generic), .icb (Image Capture Board), .vda (Video Display Adapter), and .vst (Video Super TarGA). Modern software treats them all as standard TGA files.
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