说明

定义动态范围。

定义

HI_DYNAMIC_RANGE_SDR8  = 0
HI_DYNAMIC_RANGE_SDR10 = 1
HI_DYNAMIC_RANGE_HDR10 = 2
HI_DYNAMIC_RANGE_HLG   = 3
HI_DYNAMIC_RANGE_SLF   = 4
HI_DYNAMIC_RANGE_XDR   = 5
HI_DYNAMIC_RANGE_BUTT  = 6

成员

成员名称	描述
HI_DYNAMIC_RANGE_SDR8	8bit 数据的标准动态范围。
HI_DYNAMIC_RANGE_SDR10	10bit 数据的标准动态范围
HI_DYNAMIC_RANGE_HDR10	10bit 数据的高动态范围。
HI_DYNAMIC_RANGE_HLG	带有混合对数的Gamma。
HI_DYNAMIC_RANGE_SLF	暂时无效
HI_DYNAMIC_RANGE_XDR	10bit 数据，算法处理的一个中间类型数据，用户无需关心。
HI_DYNAMIC_RANGE_BUTT	保留值。

注意事项

各个动态范围对应的曲线如下：

Dynamic Range	Transfer Characteristic
SDR8/ SDR10	0.45 V = á * Lc − (á − 1)for 1 >= Lc >= â V = 4.500 * Lcfor â > Lc >= 0
HDR10	n n V = ( ( c1 + c2 * Lc ) ÷ ( 1 + c3 * Lc ) )m for all values of Lc c1 = c3 − c2 + 1 = 3424 ÷ 4096 = 0.8359375 c2 = 32 * 2413 ÷ 4096 = 18.8515625 c3 = 32 * 2392 ÷ 4096 = 18.6875 m = 128 * 2523 ÷ 4096 = 78.84375 n = 0.25 * 2610 ÷ 4096 = 0.1593017578125 for which Lc equal to 1 for peak white is ordinarily intended to correspond to a reference output luminance level of 10000 candelas per square metre
HLG	V = a * Ln( 12 * Lc − b ) + c for 1 >= Lc > 1 ÷ 12 V = Sqrt( 3 ) * Lc0.5 for 1 ÷ 12 >= Lc >= 0 a = 0.17883277, b = 0.28466892, c = 0.55991073

Dynamic Range

Transfer Characteristic

SDR8/ SDR10

0.45

V = á * Lc − (á − 1)for 1 >= Lc >= â

V = 4.500 * Lcfor â > Lc >= 0

HDR10

n n

V = ( ( c1 + c2 * Lc ) ÷ ( 1 + c3 * Lc ) )m for all values of Lc

c1 = c3 − c2 + 1 = 3424 ÷ 4096 = 0.8359375

c2 = 32 * 2413 ÷ 4096 = 18.8515625

c3 = 32 * 2392 ÷ 4096 = 18.6875

m = 128 * 2523 ÷ 4096 = 78.84375

n = 0.25 * 2610 ÷ 4096 = 0.1593017578125

for which Lc equal to 1 for peak white is ordinarily intended to

correspond to a reference output luminance level of 10000

candelas per square metre

HLG

V = a * Ln( 12 * Lc − b ) + c for 1 >= Lc > 1 ÷ 12

V = Sqrt( 3 ) * Lc0.5 for 1 ÷ 12 >= Lc >= 0

a = 0.17883277, b = 0.28466892, c = 0.55991073

hi_dynamic_range

说明

定义

成员

注意事项