How to Convert RAW to PGM

PGM (Portable Graymap), part of the Netpbm family, stores grayscale image data at 8 bits per pixel with no color channels at all, designed as a simple lowest-common-denominator format for academic and research software. Converting a demosaiced color RAW photo to PGM strips out all color information, leaving only the grayscale luminance values, which is exactly what's needed when a computer vision pipeline or processing script specifically expects grayscale input rather than full sensor color data.

This kind of conversion is common in research and coursework settings where the specific colors in a camera-captured image don't matter as much as having a simple, well-documented format that's easy to parse directly without needing manufacturer-specific RAW decoding support.

1. Install Batchify Image Converter and Resizer Pro, which supports 47 RAW camera formats.
2. Open the app and select Batch Mode for multiple files, or Individual Mode for a single RAW file.
3. Drag your RAW files or folder into the app window, enabling recursive folder scanning if needed.
4. Set the "From" format to RAW (or your specific camera format) and the "To" format to PGM.
5. Click Convert. PGM files are written to the output folder, fully offline.

• Supports 47 RAW camera formats from major manufacturers
• Produces standard PGM files compatible with Netpbm-based research and processing tools
• Bulk-convert an entire shoot's worth of RAW files in one batch
• Multi-core processing for fast handling of large batches
• Runs fully offline, keeping unreleased material private
• No recurring subscription or hidden upload limits