Dynapik offers a free online tool to change image types - no need to download anything. It's quick and easy to use. You can change your RAF images to QOI format. This tool works for both professionals and casual users. Convert your images to QOI in seconds.
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Fujifilm RAW
The unique raw format for Fujifilm's X-Trans sensors.
RAF is the raw image format used by Fujifilm cameras. While it serves the same purpose as other raw formats, RAF files from Fuji's X-Series cameras are special because they contain data from the unique 'X-Trans' sensor array. Unlike standard sensors that use a Bayer pattern (2x2 grid), X-Trans uses a complex 6x6 pixel grid to reduce moiré without an optical low-pass filter. This means RAF files require specialized demosaicing algorithms to process correctly, making software choice more critical for Fuji users than for any other brand.
RAF files store the raw sensor data, a JPEG preview, and metadata. Fuji offers 'Uncompressed' and 'Lossless Compressed' options. The Lossless Compressed option is highly efficient, reducing file sizes significantly with no penalty. Because of the X-Trans pattern, RAF files can sometimes exhibit 'worm' artifacts when sharpened aggressively in Adobe Lightroom. This has led many Fuji users to prefer Capture One or Iridient Developer, which handle the X-Trans demosaicing better.
Fuji has used the RAF extension for decades, from their early FinePix DSLRs to the modern GFX medium format monsters. The format gained prominence with the release of the X-Pro1 in 2012, which introduced the X-Trans sensor.
Quite OK Image Format
Lossless compression that is incredibly fast.
QOI (Quite OK Image Format) is a modern lossless image format created by Dominic Szablewski in 2021. It was designed to be a simpler, faster alternative to PNG, prioritizing encoding and decoding speed over maximum compression ratio.
The QOI specification fits on a single page of paper. It achieves compression ratios similar to PNG but encodes 20x-50x faster and decodes 3x-4x faster. It uses a simple streaming algorithm with a running array of previously seen colors.
Released in 2021 as a reaction to the complexity of formats like PNG and the slowness of their reference implementations. It quickly gained viral popularity in the developer community.
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