What is the difference between RAW images and another uncompressed format like BMP?
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RAW files aren’t even exactly images, they are data from the camera’s sensor, and are created by most mid to high-end cameras if selected. They aren’t displayable as-is, they need to be converted to a color space (the set of colors a monitor can display), and white balance needs decided before it is really able to be a true image. RAW also is a different format for pretty much every different camera vendor, so it’s more of a family of formats.
The benefit is there is more data and thus you can do more advanced post-processing with that data compared to a bitmap, which has a lot less data than the raw file, but is made to be displayed directly.
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