choose gainmap application space adaptively basing on input gamuts #336
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during generateGainMap, the color spaces of hdr intent and sdr intent are unified. if a wider gamut space is converted to narrower-gamut this may result in pixel values less than zero and/or greater than 1. choosing offsets to keep the domain of log during gainmap computation is tricky. This can be mitigated by converting narrower gamut space data to wider gamut space. This yields lesser overrange values. current change implements this. for this to work as intended writing xmp metadata in the bitstream needs to be disabled. Test: ./ultrahdr_app options Co-authored-by: Vivek R Jadhav <vivek.jadhav@ittiam.com> Change-Id: I0155a1dc043f3c3e0493e04e5a6eabe160659476
DichenZhang1
approved these changes
Dec 5, 2024
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during generateGainMap, the color spaces of hdr intent and sdr intent are unified. if a wider gamut space is converted to narrower-gamut this may result in pixel values less than zero and/or greater than 1. choosing offsets to keep the domain of log during gainmap computation is tricky. This can be mitigated by converting narrower gamut space data to wider gamut space. This yields lesser overrange values. current change implements this.
for this to work as intended writing xmp metadata in the bitstream needs to be disabled.
Test: ./ultrahdr_app options
Change-Id: I0155a1dc043f3c3e0493e04e5a6eabe160659476