Contrast ratio results

Contrast ratio 7272:1
Monitor model
Submitted 31 May 2018 06:10 CEST, by 24.0.*.*
Camera model samsung SM-G955U
Processing remarks

image file 1: Note: image seems to be noisy. Try reducing the ISO setting or increasing the exposure time.
image file 2: Note: image seems to be noisy. Try reducing the ISO setting or increasing the exposure time.
Note: image file 2: suggested exposure time: 1/210 s (Set EV to -1.8)
Warning: Image ISO settings are not the same.

Black
Screen photo
Luminance 0.01 cd/m2
Luminance spread 0.01 cd/m2 (2 standard deviations)
Exposure value –2.33 stops   (aim for –2 to –3)
Exposure spread 0.64 stops
Area used for calculation 0.334 x 0.517
Camera settings Exposure time: 10   ISO: 400   F-number: 1.7
Focal length: 26 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
Luminance 90 cd/m2
Luminance spread 14 cd/m2 (2 standard deviations)
Exposure value –0.73 stops   (aim for –2 to –3)
Exposure spread 0.23 stops
Area used for calculation 0.345 x 0.46
Camera settings Exposure time: 1/60   ISO: 100   F-number: 1.7
Focal length: 26 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.