Contrast ratio results for Laptop ASUS Vivobook S15 S533 (11th Gen

Contrast ratio 84:1
Monitor model Laptop ASUS Vivobook S15 S533 (11th Gen
Submitted 06 May 2023 20:58 CEST, by 136.158.*.*
Camera model realme 8 Pro
Processing remarks

Warning: image file 1: could not determine angle of view; assuming 38 mm lens (35 mm equivalent).
image file 1: Warning: image includes screen edges or something that's not a monitor. Hold the camera close to the screen.
Warning: image file 2: could not determine angle of view; assuming 38 mm lens (35 mm equivalent).
Warning: image file 2: automatic white balance can cause inaccuracies.
image file 2: Warning: image includes screen edges or something that's not a monitor. Hold the camera close to the screen.
Warning: Image ISO settings are not the same.

Black
Screen photo
Luminance 0.32 cd/m2
Luminance spread 1.29 cd/m2 (2 standard deviations)
Exposure value –3.5 stops   (aim for –2 to –3)
Exposure spread 4.25 stops
Area used for calculation 0.528 x 0.671
Camera settings Exposure time: 1/13   ISO: 1620   F-number: 2.3
Focal length: 0 mm   (35 mm equivalent)
Exposure compensation: -1.17
White
Screen photo
Luminance 27 cd/m2
Luminance spread 46 cd/m2 (2 standard deviations)
Exposure value –1.93 stops   (aim for –2 to –3)
Exposure spread 3.72 stops
Area used for calculation 0.528 x 0.704
Camera settings Exposure time: 1/50   ISO: 219   F-number: 2.3
Focal length: 0 mm   (35 mm equivalent)
Exposure compensation: 1

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.