I'm also investigating Gain Map's, and in addition to the documentation you are referring to, I also found this PDF from Adobe: https://helpx.adobe.com/content/dam/help/en/camera-raw/using/gain-map/jcr_content/root/content/flex/items/position/position-par/table/row-3u03dx0-column-4a63daf/download_section/download-1/Gain_Map_1_0d12.pdf In here here you will find pseudocode for both encoding and decoding. However, the problem is that Adobe's encoding calculates some values, that you are supposed to pass as metadata, and use in the decoding. At this point I'm unsure if Apple supports Adobe decoding using this metadata or only their own Maps and decoding? Also for both Apple and Adobe Gain Maps the real problem is that we have no way to write Gain Maps 100% using Apple API's. I found this discussion: https://gist.github.com/kiding/fa4876ab4ddc797e3f18c71b3c2eeb3a They suggest the usage of a non-public CIImageOption called: kCIImageRepresentationHDRGainMapImage. This brings us half the way, however we sti
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Media Technologies
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General
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