CN108495054A - Processing method, device and the computer storage media of high dynamic range signal - Google Patents
Processing method, device and the computer storage media of high dynamic range signal Download PDFInfo
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- CN108495054A CN108495054A CN201810299436.3A CN201810299436A CN108495054A CN 108495054 A CN108495054 A CN 108495054A CN 201810299436 A CN201810299436 A CN 201810299436A CN 108495054 A CN108495054 A CN 108495054A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/70—Circuitry for compensating brightness variation in the scene
- H04N23/741—Circuitry for compensating brightness variation in the scene by increasing the dynamic range of the image compared to the dynamic range of the electronic image sensors
Abstract
The embodiment of the present invention provides a kind of processing method of high dynamic range signal, device and computer storage media.The processing method of the high dynamic range signal of the present invention, including：Obtain the maximum brightness value of display screen, the greatest content brightness degree and largest frames average illumination level of high dynamic range signal；Judge whether the corresponding brightness value of the greatest content brightness degree is more than the maximum brightness value；If the corresponding brightness value of the greatest content brightness degree is more than the maximum brightness value, the first mapping curve is generated according to the largest frames average illumination level, electro-optic conversion is carried out to the high dynamic range signal according to first mapping curve.The embodiment of the present invention can promote the display effect of HDR contents on a display screen.
Description
Technical field
The present embodiments relate to image display technology more particularly to a kind of processing method of high dynamic range signal, dresses
It sets and computer storage media.
Background technology
High dynamic range (High-Dynamic Range, abbreviation HDR) image can provide compared with common image
More dynamic ranges and image detail, according to the low-dynamic range of different time for exposure (Low-Dynamic Range,
LDR) image synthesizes final HDR image using the LDR image of corresponding best details of each time for exposure, can be better
Reflect the visual effect in true environment.
HDR contents (such as video content) make type it is various, such as HDR contents greatest content brightness degree
(Maximum Content Light Level, Max CLL) corresponding brightness value have 4000 nits (nit), 3000nit,
1000nit, 800nit, 300nit etc. map (Tone Mapping) link, theoretically with complete in HDR brightness
SMPTE2084 curves are restored, the SMPTE2084 curves ranging from 0 to 10000nit, however most in view of display screen
Big brightness value is concentrated mainly on 1000nit hereinafter, HDR contents are tended not to the corresponding brightness values of Max CLL as 10000nit
It is made, but 600nit, 1000nit, 4000nit etc. is fabricated to according to actual conditions, therefore, it is necessary to be mapped by brightness
(Tone Mapping) processing, the corresponding brightness values of Max CLL of HDR contents is correspondings with the maximum brightness value of display screen
Come, to reach better display effect.
Specifically, by the way of stretching or compressing the SMPTE2084 curves of interception, for example, the Max CLL of HDR contents
For 4000nit, then 0 to 4000nit part of 2084 curves of SMPTE is intercepted, i.e., is not believe in 4000-10000nit ranges
Number input, linear state, Fig. 1 be interception after curve schematic diagram, Fig. 2 be brightness map after curve schematic diagram,
Curve as shown in Figure 1 is the curve after intercepting, wherein ordinate 4000nit corresponds to abscissa 0.9, in practice for cross
The later region of coordinate 0.9 does not have signal input, and practical has been maximum value, therefore does a corresponding brightness mapping
0.9 corresponding output valve of abscissa is mapped to the output of ordinate 1.0 by (Tone Mapping) processing, such as Fig. 2.
However electro-optic conversion is carried out using the curve after stretched, the corresponding brightness value of signal can be made to be amplified,
The brightness of low bright part can be elevated, and overall contrast reduces so that the poor display effect of display screen.
Invention content
The embodiment of the present invention provides a kind of processing method of high dynamic range signal, device and computer storage media, with
Promote the display effect of HDR contents on a display screen.
In a first aspect, the embodiment of the present invention provides a kind of processing method of high dynamic range signal, including：
It is average to obtain the maximum brightness value of display screen, the greatest content brightness degree of high dynamic range signal and largest frames
Brightness degree；
Judge whether the corresponding brightness value of the greatest content brightness degree is more than the maximum brightness value；
If the corresponding brightness value of the greatest content brightness degree is more than the maximum brightness value, according to the largest frames
Average illumination level generates the first mapping curve, and electric light is carried out to the high dynamic range signal according to first mapping curve
Conversion.
With reference to first aspect, in a kind of possible realization method of first aspect, if the greatest content brightness degree
Corresponding brightness value is not more than the maximum brightness value, then carries out electricity to the high dynamic range signal according to the second mapping curve
Light is converted.
With reference to first aspect or a kind of possible realization method of first aspect, in the alternatively possible reality of first aspect
It is described that first mapping curve is generated according to the largest frames average illumination level in existing mode, including：
Judge whether the corresponding brightness value of the largest frames average illumination level is more than the maximum brightness value；
If the corresponding brightness value of the largest frames average illumination level is more than the maximum brightness value, according to the maximum
Brightness value generates first mapping curve；If being not more than, according to the Luminance Distribution information of the high dynamic range signal and
The maximum brightness value generates first mapping curve.
With reference to first aspect or any possible realization method of first aspect, in the alternatively possible of first aspect
It is described that first mapping curve is generated according to the maximum brightness value in realization method, including：
Mapping point is determined according to the maximum brightness value and the greatest content brightness degree；
The first curve break is determined according to the maximum brightness value and the first preset ratio；
First mapping curve is generated according to the mapping point, first curve break and standard handovers curve.
With reference to first aspect or any possible realization method of first aspect, in the alternatively possible of first aspect
In realization method, 0 between first curve break, first mapping curve and the standard handovers curve phase
Together, in first curve break between the mapping point, first mapping curve is linearly or nonlinearly function pair
The line segment answered.
With reference to first aspect or any possible realization method of first aspect, in the alternatively possible of first aspect
It is described to generate described the according to the Luminance Distribution information of the high dynamic range signal and the maximum brightness value in realization method
One mapping curve, including：
Mapping point is determined according to the maximum brightness value and the greatest content brightness degree；
The second curve break is determined according to the Luminance Distribution information and the second preset ratio；
First mapping curve is generated according to the mapping point, second curve break and standard handovers curve.
With reference to first aspect or any possible realization method of first aspect, in the alternatively possible of first aspect
It is described that second curve break is determined according to the Luminance Distribution information and the second preset ratio in realization method, including：
Turnover brightness value is determined according to the Luminance Distribution information and the second preset ratio；
It regard the corresponding point of the turnover brightness value on the standard handovers curve as second curve break.
With reference to first aspect or any possible realization method of first aspect, in the alternatively possible of first aspect
In realization method, 0 between second curve break, first mapping curve and the standard handovers curve phase
Together, in second curve break between the mapping point, first mapping curve is linearly or nonlinearly function pair
The line segment answered.
With reference to first aspect or any possible realization method of first aspect, in the alternatively possible of first aspect
In realization method, the method further includes：
Obtain the content histogram information of the high dynamic range signal；
The Luminance Distribution information is determined according to the content histogram information.
Second aspect, the embodiment of the present invention provide a kind of processing unit of high dynamic range signal, including：
Memory, for storing computer program；
Processor, for executing the computer program, to realize as first aspect or first aspect are any possible
Method described in realization method.
The third aspect, the embodiment of the present invention provide a kind of computer storage media, including：The computer storage media is used
In storage computer program, the computer program is any possible for realizing such as first aspect or first aspect when executing
Method described in realization method.
Processing method, device and the computer storage media of the high dynamic range signal of the embodiment of the present invention, pass through acquisition
The maximum brightness value of display screen, the greatest content brightness degree of high dynamic range signal and largest frames average illumination level, sentence
Whether the corresponding brightness value of the greatest content brightness degree that breaks is more than the maximum brightness value, if described greatest content brightness etc.
The corresponding brightness value of grade is not more than the maximum brightness value, then it is bent to generate the first mapping according to the largest frames average illumination level
Line carries out electro-optic conversion, i.e., according to greatest content brightness etc. according to first mapping curve to the high dynamic range signal
The corresponding brightness value of grade and largest frames average brightness, adjustment mapping curve carry out electro-optic conversion to HDR signals, can promote this
The display effect of HDR contents on a display screen.
Description of the drawings
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technology description to be briefly described, it should be apparent that, the accompanying drawings in the following description is this hair
Some bright embodiments for those of ordinary skill in the art without having to pay creative labor, can be with
Obtain other attached drawings according to these attached drawings.
Fig. 1 is the schematic diagram of the curve after interception；
Fig. 2 is the schematic diagram of the curve after brightness mapping；
Fig. 3 is a kind of application scenarios schematic diagram of the processing method of the high dynamic range signal of the embodiment of the present invention；
Fig. 4 is the flow chart of the processing method embodiment one of the high dynamic range signal of the present invention；
Fig. 5 is the schematic diagram of the second mapping curve of the present invention；
Fig. 6 is the flow chart of the processing method embodiment two of the high dynamic range signal of the present invention；
Fig. 7 A are a kind of schematic diagram of first mapping curve of the present invention；
Fig. 7 B are the schematic diagram of the first mapping curve of another kind of the present invention；
Fig. 8 is the structural schematic diagram of the processing unit embodiment one of the high dynamic range signal of the present invention.
Specific implementation mode
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art
The every other embodiment obtained without creative efforts, shall fall within the protection scope of the present invention.
"and/or" involved by this paper describes the incidence relation of affiliated partner, indicates may exist three kinds of relationships, for example,
A and/or B can be indicated：Individualism A exists simultaneously A and B, these three situations of individualism B.
Fig. 3 is a kind of application scenarios schematic diagram of the processing method of the high dynamic range signal of the embodiment of the present invention, such as Fig. 3
Shown, which includes terminal and server, and terminal can obtain content to be played from server, to the content to be played
After the processing such as being parsed, being decoded, in the display screen display of the terminal content to be played, which can be specifically
HDR contents, the terminal can be promoted the HDR contents and shown by the processing method of the HDR signals of the execution embodiment of the present invention
Presentation quality on screen.Its specific implementation process may refer to the specific explanations explanation of following embodiments.
It should be noted that the content to be played can be obtained from server, can also be what the terminal local stored
Content, it is not limited in the embodiment of the present invention.
The terminal of the embodiment of the present invention is referred to as terminal device, user equipment (user equipment, UE), movement
Platform (mobile station, MS), mobile terminal (mobile terminal, MT) etc..Terminal can be TV (TV), mobile phone
(mobile phone), tablet computer (Pad), the computer with radio transmission-receiving function, virtual reality (Virtual Reality,
VR) the nothing in terminal, augmented reality (Augmented Reality, AR) terminal, Industry Control (industrial control)
In line terminal, the wireless terminal in unmanned (self driving), remote operation (remote medical surgery)
Wireless terminal, the wireless terminal in intelligent grid (smart grid), in transportation safety (transportation safety)
Wireless terminal, the wireless terminal in smart city (smart city), the wireless terminal in wisdom family (smart home)
Etc..
Fig. 4 is the flow chart of the processing method embodiment one of the high dynamic range signal of the present invention, as shown in figure 4, this reality
The method for applying example may include：
Step 101 obtains the maximum brightness value of display screen, the greatest content brightness degree of high dynamic range signal and most
Big frame average illumination level.
Wherein, the maximum brightness value of display screen is the build-in attribute of the display screen, the greatest content of high dynamic range signal
Brightness degree (Maximum Content Light Level, Max CLL) and largest frames average illumination level (Maximum
Frame Average Light Level, Max FALL) it can be obtained from metadata, i.e., metadata is parsed, is obtained
Max CLL and Max FALL.The high dynamic range signal can be video content signal, which may include
Metadata and at least a frame image.
Step 102 judges whether the corresponding brightness value of the greatest content brightness degree is more than the maximum brightness value, if
It is no, 103 are thened follow the steps, if so then execute step 104.
Specifically, comparing the maximum brightness value of Max the CLL corresponding brightness value and display screen, if the Max CLL are corresponded to
Brightness value be not more than the maximum brightness value of display screen, if then execute the corresponding brightness values of 103 Max CLL of following step be more than it is aobvious
The maximum brightness value of display screen then executes following step 104.
If step 103, the corresponding brightness value of the greatest content brightness degree are not more than the maximum brightness value, basis
Second mapping curve carries out electro-optic conversion to the high dynamic range signal.
Wherein, which can be the part of SMPTE2084 curves, that is, use the SMPTE2084 curves
Part carries out electro-optic conversion to the HDR signals.Fig. 5 is the schematic diagram of the second mapping curve of the present invention, as shown in figure 5, this
Two mapping curves are the parts of SMPT2084 curves, and horizontal axis represents the HDR signals of input, that is, the electric signal inputted, such as code
It is worth (code value), range is indicated using 0-1, and the bit wide of different chips is variant, such as 10bit (0-1023), 12bit (0-
4095), the longitudinal axis represents the optical information of display screen, such as brightness value, ranging from 0-1 marks.It can be corresponding according to Max CLL
Brightness value intercepts the part of SMPTE2084 curves as second mapping curve, i.e., HDR letters are determined on second mapping curve
Number corresponding brightness value.
I.e. when the corresponding brightness values of Max CLL are not more than the maximum brightness value of display screen, which can completely go back
Former HDR signals, in order to ensure that electro-optic conversion function (Electoro-Optical Transfer Function, EOTF) follows
SMPTE2084 curves then may be used SMPTE2084 curves and carry out electro-optic conversion to HDR signals.
Step 104, if more than, then according to the largest frames average illumination level generate the first mapping curve, according to described
First mapping curve carries out electro-optic conversion to the high dynamic range signal.
If specifically, the corresponding brightness value of the greatest content brightness degree is more than the maximum brightness value, according to Max
FALL generates the first mapping curve, and the corresponding brightness value of HDR signals is determined on first mapping curve, completes electro-optic conversion.
Each frame image of HDR signals includes the code value (code value) of multiple pixels, that is, the electric signal inputted leads to
It crosses step 103 and step 104 and the code value (code value) of multiple pixels is converted into corresponding brightness value, with the brightness value
Image is presented on a display screen.
The present embodiment, by obtaining the maximum brightness value of display screen, the greatest content brightness degree of high dynamic range signal
And largest frames average illumination level, it is described most light to judge whether the corresponding brightness value of the greatest content brightness degree is more than
Angle value, it is flat according to the largest frames if the corresponding brightness value of the greatest content brightness degree is more than the maximum brightness value
Equal brightness degree generates the first mapping curve, and carrying out electric light to the high dynamic range signal according to first mapping curve turns
Change, i.e., according to the corresponding brightness value of greatest content brightness degree and largest frames average brightness, adjustment mapping curve to HDR signals into
Row electro-optic conversion can promote the display effect of HDR contents on a display screen.
Several specific embodiments are used below, and the technical solution of embodiment of the method shown in Fig. 4 is described in detail.
Fig. 6 is the flow chart of the processing method embodiment two of the high dynamic range signal of the present invention, and Fig. 7 A are of the invention
A kind of schematic diagram of first mapping curve, Fig. 7 B are the schematic diagram of the first mapping curve of another kind of the present invention, as shown in fig. 6,
The method of the present embodiment may include：
Step 201 obtains the maximum brightness value of display screen, the greatest content brightness degree of high dynamic range signal and most
Big frame average illumination level.
Step 202 judges whether the corresponding brightness value of the greatest content brightness degree is more than the maximum brightness value, if
It is no, 203 are thened follow the steps, if so then execute step 204.
If step 203, the corresponding brightness value of the greatest content brightness degree are not more than the maximum brightness value, basis
Second mapping curve carries out electro-optic conversion to the high dynamic range signal.
Wherein, the specific explanations of step 201 to step 203 illustrate to may refer to the step 101 of embodiment illustrated in fig. 4 to step
Rapid 103, details are not described herein again.
Step 204 judges whether the corresponding brightness value of the largest frames average illumination level is more than the maximum brightness value,
If so, 205 are thened follow the steps, if it is not, thening follow the steps 206.
I.e. when the corresponding brightness value of the greatest content brightness degree is more than the maximum brightness value, institute is further judged
The maximum brightness value whether corresponding brightness value of largest frames average illumination level (Max FALL) is more than display screen is stated, if so,
Step 205 is executed, if it is not, thening follow the steps 206.
If step 205, the corresponding brightness value of the largest frames average illumination level are more than the maximum brightness value, basis
The maximum brightness value generates first mapping curve.
Wherein, a kind of specifically achievable mode for first mapping curve being generated according to the maximum brightness value is：
Mapping point is determined according to the maximum brightness value and the greatest content brightness degree；It is pre- according to the maximum brightness value and first
If the first curve break of ratio-dependent；It is generated according to the mapping point, first curve break and standard handovers curve
First mapping curve.
The standard handovers curve can be SMPT2084 curves.
Specifically, 0 between first curve break, first mapping curve and the standard handovers curve phase
Together, in first curve break between the mapping point, first mapping curve is linearly or nonlinearly function pair
The line segment answered.
For example, the maximum brightness value of display screen is 1000nit, and the corresponding brightness values of Max CLL of the HDR signals are big
In 1000nit, for example, 1500nit, the corresponding brightness values of Max FALL are more than 1000nit, and for example, 1100, then pass through step
After 202 judgment step, step 204 is executed, compares whether the corresponding brightness values of Max FALL are more than the most light of display screen
Angle value thens follow the steps 205 since 1100nit is more than 1000nit, in step 205, can be according to the most light of display screen
Angle value (1000nit) and Max CLL determine mapping point, i.e., the maximum brightness value (1000nit) of Max CLL and display screen is right
It answers, i.e. when the corresponding brightness values of code value of HDR contents is equal to Max CLL corresponding brightness values, the code value of the HDR contents carries out electricity
After light conversion, the brightness value of obtained display screen is 1000nit, for example, mapping point as shown in Figure 7 A, most according to display screen
Big brightness value (1000nit) and the first preset ratio determine the first curve break, specifically, assuming that the first preset ratio is
80%, then use the maximum brightness value (1000nit) of display screen to be multiplied by 80%, i.e. 800nit, the 800nit is in SMPTE2084 songs
Corresponding point is the first curve break on line, it is specific as shown in Figure 7 A, can mapping point and the first curve break it
Between smoothed curve is set, first mapping curve between 0 to the first curve break with SMPTE2084 curve identicals,
Smoothed curve as shown in Figure 7 A between one curve break and mapping point.It will be understood, Fig. 7 A are only a kind of citing
Illustrate, can also be straight line or broken line etc. between first curve break and mapping point, differ an illustration herein.
If step 206, the corresponding brightness value of the largest frames average illumination level are not more than the maximum brightness value, root
First mapping curve is generated according to the Luminance Distribution information of the high dynamic range signal and the maximum brightness value.
Wherein, described first is generated according to the Luminance Distribution information of the high dynamic range signal and the maximum brightness value
A kind of specifically achievable mode of mapping curve is：It is determined according to the maximum brightness value and the greatest content brightness degree
Mapping point；The second curve break is determined according to the Luminance Distribution information and the second preset ratio；According to the mapping point, institute
It states the second curve break and standard handovers curve generates first mapping curve.
Specifically, this step is different from the first curve break in step 205, this step according to Luminance Distribution information and
Second preset ratio determines second curve break.
It is described that second curve break is determined according to the Luminance Distribution information and the second preset ratio, one kind it is specific
Achievable mode includes：Turnover brightness value is determined according to the Luminance Distribution information and the second preset ratio；The standard is turned
The corresponding point of the turnover brightness value changed on curve is used as second curve break.
The Luminance Distribution information includes all brightness value distributed intelligences of the HDR signals, such as comprising brightness value is 0
To 20nit accounting of the pixel in entire HDR signals, 20 to 50nit accounting etc. of the pixel in entire HDR signals
Deng, it is assumed that second preset ratio is 90%, then determines that 0 to X nit pixel is believed in entire HDR according to Luminance Distribution information
Accounting in number is 90%, then the X is brightness value of transferring.
Specifically, 0 between second curve break, first mapping curve and the standard handovers curve
Identical, in second curve break between the mapping point, first mapping curve is linearly or nonlinearly function
Corresponding line segment.
For example, the maximum brightness value of display screen is 1000nit, and the corresponding brightness values of Max CLL of the HDR signals are big
In 1000nit, for example, 1500nit, the corresponding brightness values of Max FALL are less than 1000nit, and for example, 500, then pass through step
After 202 judgment step, step 204 is executed, compares whether the corresponding brightness values of Max FALL are more than the most light of display screen
Angle value thens follow the steps 206 since 900nit is less than 1000nit, in step 206, can be according to the maximum brightness of display screen
Value (1000nit) and Max CLL determine mapping point, i.e., Max CLL is corresponding with maximum brightness value (1000nit) of display screen,
That is when the corresponding brightness value of code value of HDR contents is equal to Max CLL corresponding brightness values, the code value of the HDR contents carries out electric light
After conversion, the brightness value of obtained display screen is 1000nit, for example, mapping point as shown in Figure 7 B, according to Luminance Distribution information
The second curve break is determined with the second preset ratio, specifically, assuming that the second preset ratio is 90%, then according to Luminance Distribution
Information and the second preset ratio determine the second curve break, it is assumed that are 900nit, the 900nit is right on SMPTE2084 curves
The point answered is the second curve break, specific as shown in Figure 7 B, can be arranged between mapping point and the second curve break
Smoothed curve, first mapping curve between 0 to the second curve break with SMPTE2084 curve identicals, in the second curve
Smoothed curve as shown in Figure 7 B between turning point and mapping point.It will be understood, Fig. 7 B are only a kind of for example, should
Can also be straight line or broken line etc. between first curve break and mapping point, differ an illustration herein.
Step 207 carries out electro-optic conversion according to first mapping curve to the high dynamic range signal.
Wherein, which can be generated by step 205 or step 206.It is bent using first mapping
Line carries out electro-optic conversion to HDR signals.
Such as the example above, by step 206 so that this part 900nit to 1500nit in HDR signals passes through display screen
900nit to 1000nit restored, can not only ensure the authenticity of main brightness partial reduction, but also will not cause whole
The loss of body signal.
Optionally, a kind of method of determination of above-mentioned Luminance Distribution information is：Obtain the content of the high dynamic range signal
Histogram information determines the Luminance Distribution information according to the content histogram information.
Optionally, first preset ratio and second preset ratio are any number, for example, the first preset ratio
It is 90% with the second preset ratio.
The present embodiment, by obtaining the maximum brightness value of display screen, the greatest content brightness degree of high dynamic range signal
And largest frames average illumination level, it is described most light to judge whether the corresponding brightness value of the greatest content brightness degree is more than
Angle value, it is bent according to the second mapping if the corresponding brightness value of the greatest content brightness degree is not more than the maximum brightness value
Line carries out electro-optic conversion to the high dynamic range signal, if more than then judging that the largest frames average illumination level is corresponding
Whether brightness value is more than the maximum brightness value, if the corresponding brightness value of the largest frames average illumination level is more than the maximum
Brightness value then generates first mapping curve according to the maximum brightness value, if the largest frames average illumination level corresponds to
Brightness value be not more than the maximum brightness value, then according to the Luminance Distribution information of the high dynamic range signal and the maximum
Brightness value generates first mapping curve.Electro-optic conversion is carried out to HDR signals using different mapping curves, this can be promoted
The display effect of HDR contents on a display screen.
Compared to use it is stretched after curve carry out electro-optic conversion, overall contrast can be promoted.
Fig. 8 is the structural schematic diagram of the processing unit embodiment one of the high dynamic range signal of the present invention, as shown in figure 8,
The device of the present embodiment may include：Memory 11 and processor 12, wherein memory 11, for storing computer program；Place
Device 12 is managed, for executing the computer program, to realize the method as described in above-mentioned any embodiment.
The device of the present embodiment can be used for executing the technical solution of above method embodiment, realization principle and technology
Effect is similar, and details are not described herein again.
The embodiment of the present invention also provides a kind of computer storage media, and the computer storage media is for storing computer
Program, for realizing the method as described in above-mentioned any embodiment when the computer program executes.Its realization principle and technology
Effect is similar, and details are not described herein again.
One of ordinary skill in the art will appreciate that：Realize that all or part of step of above-mentioned each method embodiment can lead to
The relevant hardware of program instruction is crossed to complete.Program above-mentioned can be stored in a computer read/write memory medium.The journey
When being executed, execution includes the steps that above-mentioned each method embodiment to sequence；And storage medium above-mentioned includes：ROM, RAM, magnetic disc or
The various media that can store program code such as person's CD.
Finally it should be noted that：The above embodiments are only used to illustrate the technical solution of the present invention., rather than its limitations；To the greatest extent
Present invention has been described in detail with reference to the aforementioned embodiments for pipe, it will be understood by those of ordinary skill in the art that：Its according to
So can with technical scheme described in the above embodiments is modified, either to which part or all technical features into
Row equivalent replacement；And these modifications or replacements, various embodiments of the present invention technology that it does not separate the essence of the corresponding technical solution
The range of scheme.
Claims (10)
1. a kind of processing method of high dynamic range signal, which is characterized in that including：
Obtain the maximum brightness value of display screen, the greatest content brightness degree and largest frames average brightness of high dynamic range signal
Grade；
Judge whether the corresponding brightness value of the greatest content brightness degree is more than the maximum brightness value；
If the corresponding brightness value of the greatest content brightness degree is more than the maximum brightness value, average according to the largest frames
Brightness degree generates the first mapping curve, and carrying out electric light to the high dynamic range signal according to first mapping curve turns
It changes.
2. according to the method described in claim 1, it is characterized in that, the method further includes：
If the corresponding brightness value of the greatest content brightness degree is not more than the maximum brightness value, according to the second mapping curve
Electro-optic conversion is carried out to the high dynamic range signal.
3. method according to claim 1 or 2, which is characterized in that described to be given birth to according to the largest frames average illumination level
At the first mapping curve, including：
If the corresponding brightness value of the largest frames average illumination level is more than the maximum brightness value, according to the maximum brightness
Value generates first mapping curve；If being not more than, according to the Luminance Distribution information of the high dynamic range signal and described
Maximum brightness value generates first mapping curve.
4. according to the method described in claim 3, it is characterized in that, described reflect according to maximum brightness value generation described first
Curve is penetrated, including：
Mapping point is determined according to the maximum brightness value and the greatest content brightness degree；
The first curve break is determined according to the maximum brightness value and the first preset ratio；
First mapping curve is generated according to the mapping point, first curve break and standard handovers curve.
5. according to the method described in claim 4, it is characterized in that, 0 between first curve break, described first
Mapping curve and the standard handovers curve identical, in first curve break between the mapping point, described first
Mapping curve is the linearly or nonlinearly corresponding line segment of function.
6. according to the method described in claim 3, it is characterized in that, the Luminance Distribution according to the high dynamic range signal
Information and the maximum brightness value generate first mapping curve, including：
Mapping point is determined according to the maximum brightness value and the greatest content brightness degree；
The second curve break is determined according to the Luminance Distribution information and the second preset ratio；
First mapping curve is generated according to the mapping point, second curve break and standard handovers curve.
7. according to the method described in claim 6, it is characterized in that, described according to the default ratio of the Luminance Distribution information and second
Example determines the second curve break, including：
Turnover brightness value is determined according to the Luminance Distribution information and the second preset ratio；
It regard the corresponding point of the turnover brightness value on the standard handovers curve as second curve break.
8. the method according to the description of claim 7 is characterized in that 0 between second curve break, described first
Mapping curve and the standard handovers curve identical, in second curve break between the mapping point, described first
Mapping curve is the linearly or nonlinearly corresponding line segment of function.
9. a kind of processing unit of high dynamic range signal, which is characterized in that including：
Memory, for storing computer program；
Processor, for executing the computer program, to realize such as method described in any item of the claim 1 to 8.
10. a kind of computer storage media, which is characterized in that including：The computer storage media is for storing computer journey
Sequence, for realizing method such as described in any item of the claim 1 to 8 when the computer program executes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810299436.3A CN108495054B (en) | 2018-03-30 | 2018-03-30 | Method and device for processing high dynamic range signal and computer storage medium |
Applications Claiming Priority (1)
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Cited By (4)
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| CN109873957A (en) * | 2019-02-20 | 2019-06-11 | 南京航空航天大学 | A kind of processing and display methods of high dynamic range images |
| CN113178165A (en) * | 2021-03-26 | 2021-07-27 | 卡莱特云科技股份有限公司 | LED display screen correction method and device in HDR mode |
| CN113674718A (en) * | 2021-08-10 | 2021-11-19 | 北京小米移动软件有限公司 | Display brightness adjusting method, device and storage medium |
| CN113906497A (en) * | 2019-05-24 | 2022-01-07 | 交互数字Ce专利控股公司 | Apparatus and method for converting between brightness levels |
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| WO2017110823A1 (en) * | 2015-12-25 | 2017-06-29 | シャープ株式会社 | Display device, method for controlling display device, control program, and recording medium |
| CN107203974A (en) * | 2016-03-16 | 2017-09-26 | 汤姆逊许可公司 | The methods, devices and systems of HDR HDR to the HDR tones mapping of extension |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109873957A (en) * | 2019-02-20 | 2019-06-11 | 南京航空航天大学 | A kind of processing and display methods of high dynamic range images |
| CN113906497A (en) * | 2019-05-24 | 2022-01-07 | 交互数字Ce专利控股公司 | Apparatus and method for converting between brightness levels |
| CN113178165A (en) * | 2021-03-26 | 2021-07-27 | 卡莱特云科技股份有限公司 | LED display screen correction method and device in HDR mode |
| CN113178165B (en) * | 2021-03-26 | 2022-03-18 | 卡莱特云科技股份有限公司 | LED display screen correction method and device in HDR mode |
| CN113674718A (en) * | 2021-08-10 | 2021-11-19 | 北京小米移动软件有限公司 | Display brightness adjusting method, device and storage medium |
| CN113674718B (en) * | 2021-08-10 | 2022-10-18 | 北京小米移动软件有限公司 | Display brightness adjusting method, device and storage medium |
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