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 PEF images to PGX format. This tool works for both professionals and casual users. Convert your images to PGX in seconds.
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Pentax Electronic File
Pentax's native raw format, offering a choice against DNG.
PEF is the proprietary raw image format used by Pentax (Ricoh) cameras. Uniquely, Pentax DSLRs (like the K-1 and K-3) allow users to choose between saving files as PEF or Adobe DNG in-camera. PEF files contain the raw sensor data and proprietary metadata that is optimized for Pentax's own software.
PEF is a TIFF-based format using lossless compression. It is functionally very similar to DNG, but because it is proprietary, it may contain specific 'MakerNotes' that third-party software might not fully decode (though this is rare nowadays).
Pentax has used PEF since their first digital SLRs. Despite adopting DNG as an in-camera option, they have kept PEF as the default native format.
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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