Contrast ratio results for nec

Contrast ratio 3285:1 (edge: 2462:1)
Monitor model nec
Submitted 08 Sep 2017 14:42 CEST, by 212.233.*.*
Camera model Xiaomi MI 5s
Processing remarks

Warning: image file 1: camera was zoomed out too much.
Warning: image file 1: automatic white balance can cause inaccuracies.
image file 1: Note: image seems to be noisy. Try reducing the ISO setting or increasing the exposure time.
Warning: image file 1: Underexposed. Please increase the shutter time.
Note: image file 1: suggested exposure time: 0.4 s (Set EV to +2.9)
Warning: image file 2: camera was zoomed out too much.
Warning: image file 2: automatic white balance can cause inaccuracies.
Note: image file 2: suggested exposure time: 1/300 s (Set EV to -1.6)
Warning: image file 3: camera was zoomed out too much.
Warning: image file 3: automatic white balance can cause inaccuracies.
image file 3: Note: image seems to be noisy. Try reducing the ISO setting or increasing the exposure time.
Warning: image file 3: Underexposed. Please increase the shutter time.
Note: image file 3: suggested exposure time: 0.3 s (Set EV to +2.5)
Warning: Image ISO settings are not the same.

Black
Screen photo
Luminance 0.02 cd/m2
Luminance spread 0 cd/m2 (2 standard deviations)
Exposure value –5.37 stops   (aim for –2 to –3)
Exposure spread 0.28 stops
Area used for calculation 0.1 x 0.1
Camera settings Exposure time: 1/17   ISO: 6400   F-number: 2
Focal length: 5 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
Luminance 72 cd/m2
Luminance spread 1 cd/m2 (2 standard deviations)
Exposure value –0.93 stops   (aim for –2 to –3)
Exposure spread 0.03 stops
Area used for calculation 0.1 x 0.1
Camera settings Exposure time: 1/100   ISO: 250   F-number: 2
Focal length: 5 mm   (35 mm equivalent)
Exposure compensation: 0
Black at screen edge
Screen photo
Luminance 0.03 cd/m2
Luminance spread 0 cd/m2 (2 standard deviations)
Exposure value –4.96 stops   (aim for –2 to –3)
Exposure spread 0.22 stops
Area used for calculation 0.1 x 0.1
Camera settings Exposure time: 1/17   ISO: 6400   F-number: 2
Focal length: 5 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.