2 0 H a M e s i l a S t . , N e s h e r 3 6 8 8 5 2 0 , I s r a e l
P O B 2 5 0 0 4 , H a i f a 3 1 2 5 0 0 1 , I s r a e l
T e l : ( + 9 7 2 ) - 7 2 - 2 7 2 3 5 0 0 F a x : ( + 9 7 2 ) - 7 2 - 2 7 2 3 5 1 1
Page no. 42 | Appendix No. 1
8.11.17
lut_fast_gamma <gamma>
The fast gamma function uses the same formula as the lut_fun_rec709 command, but the user only has to specify
the desired gamma value. All other values are fixed or computed as needed.
Value
Minimal
Maximal
REC.709
Gamma
1100
3000
2222
Remarks:
1.
The value is normalized to a range from 0.0 to 1.0 and multiplied by a scaling coefficient of 1000.
2.
Setting a value of 2222 will result in the default REC.709 gamma curve.
Example:
lut_mode 1
// select lut mode 1 (Fast gamma mode)
lut_enable 0 1
// make sure lut is enabled
lut_fast_gamma 2222
8.11.18
lut_fixed_mode <mode>
The fixed gamma mode contains three presets which are shown in the table below:
Mode
Description
0 (default)
REC.709 gamma curve
1
PQ gamma curve specified in ITU-R BT.2100 which can be used for HDR content
2
HLG gamma curve specified in ITU-R BT.2100 which can be used for HDR content
Examples:
lut_mode 2
// select lut mode 2 (
Fixed gamma mode)
lut_enable 0 1
// make sure lut is enabled
lut_fixed_mode 0
// select fixed lut mode 0 (REC.709 gamma curve)
8.12
Image statistic commands
8.12.1
stat_rgb
Dumps the average image value for each color channel (RGB). Ranges from 0 to 4095.
Examples:
Command: stat_rgb
Response: stat_rgb 1040 896 1200