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 PFM images to common formats like PNG, WEBP, JPEG, SVG, DCX, PALM and PTIF. This tool works for both professionals and casual users. Convert your images to the format you want in seconds.
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PFM (Portable Float Map) is a minimal image format designed to store floating-point data, specifically for High Dynamic Range (HDR) imaging. Unlike standard formats that clamp values between 0 and 255, PFM stores raw 32-bit floating point numbers, allowing for values far brighter than white (pixel values > 1.0) or negative values (useful for data maps).
The format is an unofficial extension of the Netpbm family (PPM/PGM). It starts with a simple header: `PF` (for RGB) or `Pf` (for grayscale), followed by dimensions and a scale factor (which also indicates endianness). The data follows as raw binary 32-bit floats. Its simplicity makes it the 'CSV' of HDR image formats—easy to write a parser for in a few lines of C++.
Popularized by Paul Debevec and the computer graphics research community in the late 90s as a way to exchange HDR light probe data before widely supported standards like OpenEXR existed.
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