White balance error on Sony RX100

[kmaddock]

When opening a raw file, the White Balance information is not correctly read. The image was shot underwater with custom white balance, so I would guess that the temperature recorded in the Exif data is out of the expected range.

On the white balance tab, I see: Temperature: 1500 Tint: 0.020 Blue/Red: 1.0

In the Exif metadata: Temperature: 9900

Manually setting the white balance temperature to 9900 and Tint to 1.0 corrects the image. Setting the white balance method to Auto fails (sets Temperature: 1500, Tint: 0.020)

Test Files: https://drive.google.com/open?id=0B3VUZ5xw6XpKZWVPc2RRVlhSY0U

RawTherapee Version: Version: 5.1 Branch: 5.1 Commit: f23d70fd Commit date: 2017-05-15 Compiler: gcc 6.3.0 Processor: generic x86 System: Windows Bit depth: 64 bits Gtkmm: V3.22.0 Build type: release Build flags: -m64 -mwin32 -mthreads -Werror=unused-label -Werror=unknown-pragmas -Wno-aggressive-loop-optimizations -std=c++11 -mtune=generic -Werror=unused-label -fopenmp -Werror=unknown-pragmas -Wall -Wno-unused-result -Wno-deprecated-declarations -mwindows -DNDEBUG -msse2 -O3 Link flags: -m64 -mthreads -static-libgcc -mtune=generic -mwindows -s -O3 OpenMP support: ON MMAP support: ON

Downloaded from: http://www.rawtherapee.com/shared/builds/windows/RawTherapee_5.1_WinVista_64.zip

System: Windows 10 Enterprise 64-bit Intel Xeon E5-2630v4 x2 @2.2GHz 64Gb ram

[heckflosse]

Bug confirmed.

[Desmis]

With the current gray auto WB, it is impossible to build a correct WB

2 ways

1. increase "Blue red equalizer" for example to 1.35, then activate "auto", in this case we get

   • temp = 43178
   • tint = 1.207

2. Or used one of the 2 preset "underwater"

   • underwater1 give a middle result, and auto does not work
   • underwater2 give : temp = 48000 tint = 0.63 and blue/red equalizer = 1.38 If you activared "auto" : temp = 34129 tint = 1.366 equal = 1.38