Contrast ratio results

Contrast ratio 87:1
Monitor model
Submitted 31 Jan 2022 07:08 CET, by 180.247.*.*
Camera model Google Pixel 4
Processing remarks

Warning: image file 1: automatic white balance can cause inaccuracies.
Warning: image file 2: automatic white balance can cause inaccuracies.
Note: image file 2: suggested exposure time: 1/270 s (Set EV to -1.9)
Warning: Image ISO settings are not the same.

Black
Screen photo
Luminance 0.73 cd/m2
Luminance spread 1.83 cd/m2 (2 standard deviations)
Exposure value –3.04 stops   (aim for –2 to –3)
Exposure spread 4.25 stops
Area used for calculation 0.39 x 0.39
Camera settings Exposure time: 1/43   ISO: 1760   F-number: 1.7
Focal length: 27 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
Luminance 63 cd/m2
Luminance spread 5 cd/m2 (2 standard deviations)
Exposure value –0.65 stops   (aim for –2 to –3)
Exposure spread 0.11 stops
Area used for calculation 0.39 x 0.39
Camera settings Exposure time: 1/76   ISO: 189   F-number: 1.7
Focal length: 27 mm   (35 mm equivalent)
Exposure compensation: 0

The luminance values in cd/m2 are not very reliable, since camera sensitivities can easily differ up to 50% from their nominal value. Typically, the real luminance is 30% lower than this number. The area used for calculation is chosen such that it corresponds to a viewing angle of ±14° horizontally and ±10.5° vertically, which is equivalent to viewing the screen from a distance of about 1.5 times the diagonal size.

Unfortunately, there is a lot of variation in how cameras use EXIF settings. If photos from your camera your produce unusable results, try coming back in a few days. I review submitted pictures regularly and try to fix problems.