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US 12,120,473 B2Granted
Video signal processing method and apparatus
AssigneeHuawei Technologies Co., Ltd.
InventorsWeiwei Xu, Quanhe Yu, Hu Chen, Xiaodong Xu
Life of this patent
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Abstract
A chrominance adjustment method and apparatus, and a storage medium are provided. The method includes: determining a color adjustment coefficient of a chrominance component of a color signal based on a reference display device maximum luminance value (RML) and/or a source maximum luminance value (SML); and adjusting the chrominance component of the color signal based on the color adjustment coefficient.
Claims17
A chrominance adjustment method, comprising:
- determining a color adjustment coefficient of a chrominance component of a color signal based on at least one of a reference display device maximum luminance value (RML) or a source maximum luminance value (SML), wherein the color adjustment coefficient is determined based on the following formula:
- S
- =
- {
- B
- -
- C
-
-
- 2
- ×
- SatR
-
-
- 1
- ×
- f
-
- (
- (
- Y
- i
-
- n
- -
- A
- ×
- R
-
- M
-
- L
- )
- (
- R
-
- M
-
- L
- -
- A
- ×
- R
-
- M
-
- L
- )
- )
- ,
-
- R
-
-
- M
-
-
- L
- >
- Y
- i
-
- n
- >
- A
- ×
- R
-
-
- M
-
-
- L
- B
- -
- C
-
-
- 2
- ×
- SatR
-
-
- 1
- ,
-
- Y
- i
-
- n
- ≥
- R
-
-
- M
-
-
- L
- ,
- wherein
- S is the color adjustment coefficient, A is an adjustment range coefficient, B is a strength range coefficient, C2 is a second correction strength factor, Yin is a luminance component value of the color signal, f(x) is a monotonically increasing function when x is in an interval 0 to 1, and SatR1 is a first saturation adjustment coefficient;
- and
- adjusting the chrominance component of the color signal based on the color adjustment coefficient.
100 more elements
A chrominance adjustment method, comprising:
- determining a color adjustment coefficient of a chrominance component of a color signal based on at least one of a reference display device maximum luminance value (RML) or a source maximum luminance value (SML), wherein the color adjustment coefficient is determined based on the following formula:
- S
- =
- {
- B
- -
- C
-
-
- 2
- ×
- SatR
-
-
- 1
- ×
- (
- Y
- i
-
- n
- -
- A
- ×
- R
-
- M
-
- L
- )
- (
- R
-
- M
-
- L
- -
- A
- ×
- R
-
- M
-
- L
- )
-
- ,
-
- R
-
-
- M
-
-
- L
- >
- Y
- i
-
- n
- >
- A
- ×
- R
-
-
- M
-
-
- L
- B
- -
- C
-
-
- 2
- ×
- SatR
-
-
- 1
- ,
-
- Y
- i
-
- n
- ≥
- R
-
-
- M
-
-
- L
- ,
- wherein
- S is the color adjustment coefficient, A is an adjustment range coefficient, B is a strength range coefficient, C2 is a second correction strength factor, Yin is a luminance component value of the color signal, and SatR1 is a first saturation adjustment coefficient;
- and
- adjusting the chrominance component of the color signal based on the color adjustment coefficient.
97 more elements
A chrominance adjustment method, comprising:
- determining a color adjustment coefficient of a chrominance component of a color signal based on at least one of a reference display device maximum luminance value (RML) or a source maximum luminance value (SML), wherein the color adjustment coefficient is determined based on the following formula:
- S
- =
- {
- B
- -
- C
-
-
- 2
- ×
- SatR
-
-
- 1
- ×
- f
-
- (
- (
- Y
- i
-
- n
- -
- A
- ×
- R
-
- M
-
- L
- )
- (
- R
-
- M
-
- L
- -
- A
- ×
- R
-
- M
-
- L
- )
- )
- ,
- R
-
-
- M
-
-
- L
- >
- Y
- i
-
- n
- >
- A
- ×
- R
-
-
- M
-
-
- L
- B
- -
- C
-
-
- 2
- ×
- SatR
-
-
- 1
- -
- C
-
-
- 2
- ×
- SatR
-
-
- 2
- ×
- g
-
- (
- (
- Y
- i
-
- n
- -
- R
-
- M
-
- L
- )
- (
- S
-
- M
-
- L
- -
- R
-
- M
-
- L
- )
- )
- ,
-
- Y
- i
-
- n
- ≥
- R
-
-
- M
-
-
- L
- ,
- wherein
- S is the color adjustment coefficient, A is an adjustment range coefficient, B is a strength range coefficient, C2 is a second correction strength factor, Yin is a luminance component value of the color signal, f(x) is a monotonically increasing function when x is in an interval 0 to 1, and SatR1 is a first saturation adjustment coefficient, g(x) is a monotonically increasing function when x is in an interval 0 to 1, and SatR2 is a second saturation adjustment coefficient;
- and
- adjusting the chrominance component of the color signal based on the color adjustment coefficient.
139 more elements
An apparatus for a chrominance adjustment, comprising:
- a processor;
- and
- a memory coupled to the processor to store instructions, which when executed by the processor, cause the apparatus to
- determine a color adjustment coefficient of a chrominance component of a color signal based on at least one of a reference display device maximum luminance value (RML) or a source maximum luminance value (SML), wherein the color adjustment coefficient is determined based on the following formula:
- S
- =
- {
- B
- -
- C
-
-
- 2
- ×
- SatR
-
-
- 1
- ×
- f
-
- (
- (
- Y
- i
-
- n
- -
- A
- ×
- R
-
- M
-
- L
- )
- (
- R
-
- M
-
- L
- -
- A
- ×
- R
-
- M
-
- L
- )
- )
- ,
-
- R
-
-
- M
-
-
- L
- >
- Y
- i
-
- n
- >
- A
- ×
- R
-
-
- M
-
-
- L
- B
- -
- C
-
-
- 2
- ×
- SatR
-
-
- 1
- ,
-
- Y
- i
-
- n
- ≥
- R
-
-
- M
-
-
- L
- ,
- wherein
- S is the color adjustment coefficient, A is an adjustment range coefficient, B is a strength range coefficient, C2 is a second correction strength factor, Yin is a luminance component value of the color signal, f(x) is a monotonically increasing function when x is in an interval 0 to 1, and SatR1 is a first saturation adjustment coefficient;
- and
- adjust the chrominance component of the color signal based on the color adjustment coefficient.
103 more elements
Dependencies are inferred from the claim text.