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HDR to PBM
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HDR (Radiance RGBE image format) is an image file format designed to store images with a broad range of luminance levels, from deep shadows to bright highlights, capturing more detail in both areas than standard digital imaging formats. This format is commonly used in photography and computer graphics to achieve more realistic or artistically enhanced representations of light in images. However, HDR files can be larger in size, and they require compatible software and displays to fully appreciate the enhanced dynamic range.

PBM stands for Portable Bitmap, and it is a monochrome image format that is part of the Netpbm package. It stores image data as a series of ASCII or binary values representing each pixel in the image, with 1s representing black pixels and 0s representing white pixels. PBM files are simple and easy to read but can be quite large since they do not use any compression.