Contrast ratio results

Contrast ratio 368:1
Monitor model
Submitted 05 Apr 2013 00:02 CEST, by 67.176.*.*
Camera model HTC One X
Processing remarks

Warning: image file 1: could not determine angle of view; assuming 38 mm lens (35 mm equivalent).
Warning: image file 1: Underexposed. Please increase the shutter time.
Note: image file 1: suggested exposure time: 0.3 s (Set EV to +2.2)
Warning: image file 2: could not determine angle of view; assuming 38 mm lens (35 mm equivalent).
Note: image file 2: suggested exposure time: 1/130 s (Set EV to -1.1)
Warning: Image ISO settings are not the same.

Black
Screen photo
Luminance 0.16 cd/m2
Luminance spread 0.08 cd/m2 (2 standard deviations)
Exposure value –4.75 stops   (aim for –2 to –3)
Exposure spread 0.72 stops
Area used for calculation 0.528 x 0.527
Camera settings Exposure time: 1/15   ISO: 1210   F-number: 2
Focal length: 0 mm   (35 mm equivalent)
Exposure compensation: 0
White
Screen photo
Luminance 58 cd/m2
Luminance spread 12 cd/m2 (2 standard deviations)
Exposure value –1.38 stops   (aim for –2 to –3)
Exposure spread 0.3 stops
Area used for calculation 0.528 x 0.527
Camera settings Exposure time: 1/60   ISO: 136   F-number: 2
Focal length: 0 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.