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 MEF images to PPM format. This tool works for both professionals and casual users. Convert your images to PPM in seconds.
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Mamiya RAW
Raw format for the Mamiya ZD and digital backs.
MEF is the raw image format used by Mamiya digital cameras, most notably the Mamiya ZD medium format DSLR. Before Mamiya was acquired by Phase One, they produced their own digital backs and integrated cameras.
MEF files contain high-resolution medium format sensor data (typically 22MP in the ZD era). They are TIFF-based and store 14-bit or 16-bit data.
Mamiya was a titan of film medium format. Their transition to digital was rocky, and the MEF format is a relic of that transition period before Phase One took over the ecosystem.
Portable Pixel Map
The standard uncompressed color format of the Netpbm suite.
PPM (Portable Pixel Map) is the color counterpart to PGM and PBM. It is the most widely used format in the Netpbm library for storing full-color RGB images. Like its siblings, it is designed for extreme simplicity and ease of interchange between Unix tools.
PPM files come in two flavors: P3 (ASCII) and P6 (Binary). - **ASCII (P3)**: Pixels are written as readable RGB triplets (e.g., `255 0 0` for red). - **Binary (P6)**: Pixels are raw byte triplets. The header is minimal: Magic Number, Width, Height, Maxval. It does not support alpha channels (use PAM for that) or compression.
Developed by Jef Poskanzer in 1991 to bring color support to the pbmplus (Netpbm) toolkit. It became the lingua franca for Unix graphics utilities.
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