Convert MEF to PNM

The Mamiya Electronic Format (MEF) is a raw image file format used by Mamiya digital cameras to store unprocessed and uncompressed image data directly from the camera sensor. Introduced in the mid-2000s, MEF files maintain the original scene's dynamic range and quality, allowing professional photographers extensive post-processing control. These files are typically large due to their uncompressed nature and include vital metadata such as exposure settings and white balance. MEF files are commonly edited using specialized software like Adobe Photoshop and Lightroom.

The PNM (Portable Anymap) file extension, developed by Jef Poskanzer in the 1980s, stands for Portable Any Map. It is an uncompressed raster graphics format designed for portable image storage and exchange, encompassing three sub-formats: PBM (Portable Bitmap), PGM (Portable Graymap), and PPM (Portable Pixmap). PNM files store image data in plain text or binary format, ensuring easy usage across different platforms and applications. This format is widely supported by various image editing software and is valued for its simplicity and lossless compression.