HDR PQ Test Pattern for Measuring Phone EOTF Tracking (10% window)
19I created this test pattern in order to be able to profile the accuracy of HDR Phones.
To use this test pattern, place colorimeter at the circle and run a measuring program on PC to continuously read values (I recommend hcfr: https://sourceforge.net/projects/hcfr/ ).
I recommend using this test pattern at 25% playback speed for easier pausing and resuming.
Every other frame is a black frame to prevent OLED auto dimming on static content, and because I noticed my QD-OLED (at least) displays somewhat different brightness if value moves from eg 74% to 75% brightness than it does when value moves from 0% to 75%. Black frames ensure that all values are compared on equal footing, and not being biased by the previously shown value.
I sized this pattern to cover 10% area of standard 4k 19:9 aspect ratio screen.
This is the google sheet I created to be used with this test pattern with the purpose of creating EOTF graphs: https://docs.google.com/spreadsheets/d/18IGWDipM6Im5l22ihRl8FMRbFqykcBuCpOccSwV7yD0/edit?usp=sharing
PQ nits (cd/m²)
0 0.0000
0.01 0.0023
0.02 0.0087
0.03 0.0198
0.04 0.0365
0.05 0.0600
0.06 0.0914
0.07 0.1320
0.08 0.1833
0.09 0.2469
0.10 0.3246
0.11 0.4183
0.12 0.5303
0.13 0.6630
0.14 0.8189
0.15 1.0011
0.16 1.2127
0.17 1.4572
0.18 1.7386
0.19 2.0610
0.20 2.4293
0.21 2.8484
0.22 3.3239
0.23 3.8622
0.24 4.4698
0.25 5.1542
0.26 5.9234
0.27 6.7863
0.28 7.7525
0.29 8.8326
0.30 10.0382
0.31 11.3819
0.32 12.8775
0.33 14.5401
0.34 16.3861
0.35 18.4336
0.36 20.7022
0.37 23.2134
0.38 25.9906
0.39 29.0594
0.40 32.4479
0.41 36.1865
0.42 40.3086
0.43 44.8505
0.44 49.8521
0.45 55.3567
0.46 61.4117
0.47 68.0689
0.48 75.3849
0.49 83.4213
0.50 92.2457
0.51 101.9318
0.52 112.5601
0.53 124.2188
0.54 137.0039
0.55 151.0206
0.56 166.3842
0.57 183.2202
0.58 201.6663
0.59 221.8730
0.60 244.0052
0.61 268.2431
0.62 294.7842
0.63 323.8448
0.64 355.6618
0.65 390.4947
0.66 428.6282
0.67 470.3742
0.68 516.0750
0.69 566.1060
0.70 620.8794
0.71 680.8477
0.72 746.5079
0.73 818.4061
0.74 897.1427
0.75 983.3779
0.76 1077.8378
0.77 1181.3220
0.78 1294.7106
0.79 1418.9731
0.80 1555.1784
0.81 1704.5047
0.82 1868.2520
0.83 2047.8554
0.84 2244.8994
0.85 2461.1351
0.86 2698.4983
0.87 2959.1303
0.88 3245.4014
0.89 3559.9366
0.90 3905.6447
0.91 4285.7513
0.92 4703.8357
0.93 5163.8717
0.94 5670.2746
0.95 6227.9535
0.96 6842.3706
0.97 7519.6074
0.98 8266.4406
0.99 9090.4270
1 10000.0000