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In memory, HDR images are treated with the highest possible precision. When it comes to saving an image or video data, it is important to find formats that reduce the file size to a minimum without losing the dynamic range or fine details. This tradeoff is similar to lossy versus lossless compression schemes: how to compress as much as possible without losing too many details. Image encoding involves data formatting and data compression. A few data compression and data encoding methods are described here, but first, color space is introduced, along with the issues encountered when working with changes in color space.
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