improve white balance adjustments #980

Job	Run time
windows-2019 / Release / cl	35m 43s
ubuntu-22.04 / Release / gcc-11	25m 51s
windows-2019 / Release / clang	37m 6s
macos-13 / Release / homebrew-clang	24m 25s
ubuntu-22.04 / Debug / gcc-11	22m 52s
windows-2019 / Release / clang-cl	39m 35s
macos-13 / Debug / homebrew-clang	17m 35s
ubuntu-22.04 / Release / gcc-12	31m 0s
windows-2019 / Debug / cl	29m 32s
macos-14 / Release / homebrew-clang	11m 33s
ubuntu-22.04 / Debug / gcc-12	27m 9s
windows-2019 / Debug / clang	31m 52s
macos-14 / Debug / homebrew-clang	8m 34s
ubuntu-22.04 / Release / gcc-13	31m 36s
windows-2019 / Debug / clang-cl	34m 5s
ubuntu-22.04 / Debug / gcc-13	30m 7s
ubuntu-22.04 / Release / clang-14	26m 22s
ubuntu-22.04 / Debug / clang-14	19m 47s
windows-2022 / Release / cl	41m 8s
ubuntu-22.04 / Release / clang-15	26m 4s
windows-2022 / Release / clang	41m 40s
ubuntu-22.04 / Debug / clang-15	21m 3s
windows-2022 / Release / clang-cl	40m 38s
ubuntu-22.04 / Release / clang-16	27m 55s
windows-2022 / Debug / cl	23m 26s
ubuntu-22.04 / Debug / clang-16	21m 16s
windows-2022 / Debug / clang	38m 12s
ubuntu-22.04 / Release / clang-17	28m 17s
windows-2022 / Debug / clang-cl	36m 3s
ubuntu-22.04 / Debug / clang-17	21m 12s
	14h 11m 38s

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