CN106847149A - A kind of tone mapping of high dynamic contrast image and display methods - Google Patents
A kind of tone mapping of high dynamic contrast image and display methods Download PDFInfo
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Abstract
The invention provides a kind of tone mapping of high dynamic contrast image and display methods, including：S101, acquisition display maximum gray corresponding brightness and minimum gray corresponding brightness；S102, the Luminance Distribution and its corresponding location of pixels of minimum brightness that obtain input two field picture；S103, all pixels to being input into two field picture calculate brightness step with second direction in the first direction respectively；S104, treatment is compressed to brightness step using gradient compression function；S105, the corresponding location of pixels of assignment minimum brightness are minimum gray corresponding brightness, and reconstruct whole two field picture with second direction in the first direction respectively；S106, obtain reconstruct after whole two field picture high-high brightness and calculate proportionality coefficient；S107, adoption rate coefficient modifying gradient compression function, and output display after step S104 and S105 is repeated once with revised gradient compression function.The present invention can obtain well-bedded topography's details.
Description
Technical field
The invention belongs to display control technology field, specifically, more particularly to a kind of color of high dynamic contrast image
Adjust mapping and display methods.
Background technology
The brightness range of nature is 1E-6 to 1.6E+9 nits, and contrast is up to 1015.The static contrast range of human eye
It is 1000:1-15000:1, but the luminous flux by changing the size of pupil to control different, and the dynamic contrast of human eye is high
Up to 1000000：1.And common display is generally encoded using 8bit, grey exponent number excursion is 0-255, and contrast only has
1000 or so, thus serious contrast distortion phenomenon, the main table of distortion phenomenon occurs when high dynamic contrast image is shown
Now for loss in detail, highlights overexposure or dark portion owe the features such as exposure.
In traditional Film technique, by the artificial light exposure for reducing highlights or increase the light exposure of dark portion come
Obtain the image detail of high-contrast, i.e., under-exposure and overexposure.Existing professional imaging device is detected with CCD or CMOS
The development of device technology, the contrast of part imaging device has reached 30000:1.But, the display of current high dynamic contrast
Device is not yet popularized completely, thus how to realize that the display of high dynamic contrast image just seems particularly heavy on traditional monitor
Will.
Given birth to corresponding to how to realize high dynamic contrast image problem, tone mapping application on traditional monitor.But
It is that tone mapping is still not all roses in terms of local detail is processed using traditional global variable method.
The content of the invention
To solve problem above, the invention provides a kind of tone mapping of high dynamic contrast image and display methods,
For obtaining well-bedded topography's details.
According to one embodiment of present invention, there is provided tone mapping and the display side of a kind of high dynamic contrast image
Method, including：
S101, acquisition display maximum gray corresponding brightness and minimum gray corresponding brightness；
S102, the Luminance Distribution and its corresponding location of pixels of minimum brightness that obtain input two field picture；
S103, all pixels to being input into two field picture calculate brightness step with second direction in the first direction respectively；
S104, treatment is compressed to the brightness step using gradient compression function；
S105, the corresponding location of pixels of assignment minimum brightness are minimum gray corresponding brightness, and will compression centered on it
Brightness step after treatment reconstructs whole two field picture along the first direction and the second direction respectively；
S106, the high-high brightness for obtaining whole two field picture after reconstruct, and combine display maximum gray corresponding brightness calculating ratio
Example coefficient；
S107, using gradient compression function described in the proportionality coefficient amendment, and with revised gradient compression function weight
Output display after multiple step a S104 and S105.
According to one embodiment of present invention, the first direction and the second direction are set as being respectively parallel to display
The adjacent both sides of device screen, wherein, the first direction and the second direction are vertical, and with level to the right and straight down
It is positive direction.
According to one embodiment of present invention, the gradient compression function is expressed as：
F (x)=A*x1/B
Wherein, A is real number, and B is positive integer, and x is brightness step.
According to one embodiment of present invention, the high-high brightness of whole two field picture after reconstructing is obtained, and it is maximum to combine display
GTG corresponding brightness calculates proportionality coefficient and further includes to calculate the proportionality coefficient k using following formula：
K=Lmax/Lummax
Wherein, LmaxRepresent display device maximum gray corresponding brightness, LummaxRepresent whole two field picture high-high brightness.
According to one embodiment of present invention, further wrapped using gradient compression function described in the proportionality coefficient amendment
Include：
F ' (x)=k*f (x)
Wherein, f (x) represents gradient compression function, and f ' (x) represents revised gradient compression function.
According to one embodiment of present invention, using following formula to be input into two field picture all pixels respectively in the first direction and
Second direction calculates brightness step：
D1 ' (m, n)=and L (m+1, n)-L (m, n) }/L (m, n)
D2 ' (m, n)={ L (m, n+1)-L (m, n) }/L (m, n)
Wherein, D1 ' (m, n) expressions first direction brightness step, D2 ' (m, n) expression second direction brightness steps, L (m+1,
N) denotation coordination (m+1, n) brightness of respective pixel, the brightness of L (m, n+1) denotation coordination (m, n+1) respective pixel, L (m, n)
The brightness of denotation coordination (m, n) respective pixel.
According to one embodiment of present invention, whole two field picture is reconstructed along the first direction and the second direction respectively to enter
One step includes：
Obtain the brightness ladder of the current pixel correspondence first direction and the second direction adjacent pixel in positive direction
Degree；
Respectively along the positive direction and the positive direction of the second direction of the first direction, brightness according to adjacent pixel and
Brightness step calculates the brightness of current pixel.
According to one embodiment of present invention, according to adjacent pixel brightness and brightness step calculates the bright of current pixel
Degree, and the brightness of current pixel is calculated using following formula：
L (x, y)={ L (x-1, y) (1+D1'(x-1, y))+L (x, y-1) (1+D2'(x, y-1)) }/2
Wherein, L (x, y) denotation coordination is the brightness of the pixel of (x, y), and (x-1, y) denotation coordination is (x-1, picture y) to L
Element brightness, L (x, y-1) denotation coordination for (x, y-1) pixel brightness, D1'(x-1, y) denotation coordination for (x, y) picture
Element and coordinate be (x-1, the brightness step of pixel y), D2'(x, y-1) denotation coordination for (x, y) pixel and coordinate for (x,
The brightness step of pixel y-1).
According to one embodiment of present invention, the corresponding location of pixels of the minimum brightness is obtained using search method.
According to one embodiment of present invention, when same input two field picture includes the corresponding pixel position of multiple minimum brightnesses
When putting, the corresponding location of pixels of first minimum brightness for searching is taken.
Beneficial effects of the present invention：
The present invention by reconstruct after whole two field picture high-high brightness correspond to the maximum gray of display so that whole frame figure
As having maximum brightness coverage, and then obtain well-bedded topography's details.
Other features and advantages of the present invention will be illustrated in the following description, also, the partly change from specification
Obtain it is clear that or being understood by implementing the present invention.The purpose of the present invention and other advantages can be by specification, rights
Specifically noted structure is realized and obtained in claim and accompanying drawing.
Brief description of the drawings
Technical scheme in order to illustrate more clearly the embodiments of the present invention, below embodiment will be described needed for want
Accompanying drawing does simple introduction：
Fig. 1 is method flow diagram according to an embodiment of the invention；
Fig. 2 is first direction according to an embodiment of the invention and second direction schematic diagram；
Fig. 3 is the schematic diagram that use gradient compression function according to an embodiment of the invention processes brightness step.
Specific embodiment
Describe embodiments of the present invention in detail below with reference to drawings and Examples, how the present invention is applied whereby
Technological means solves technical problem, and reaches the implementation process of technique effect and can fully understand and implement according to this.Need explanation
As long as not constituting conflict, each embodiment in the present invention and each feature in each embodiment can be combined with each other,
The technical scheme for being formed is within protection scope of the present invention.
The invention provides a kind of tone mapping of high dynamic contrast image and display methods, using human visual system
The characteristics of more sensitive compared to absolute brightness difference for local contrast, optimize the compression factor of different luminance contrasts, lead to
Cross sacrifice absolute brightness Distribution value and realize the maintenance of topography's contrast relative size, so as to obtain well-bedded part
Image detail.
It is as shown in Figure 1 the method flow diagram according to one embodiment of the present of invention, the present invention is entered below with reference to Fig. 1
Row is described in detail.
First, in step S101, display device maximum gray corresponding brightness and minimum gray corresponding brightness are obtained.
Specifically, corresponding to each specific display device, it has fixed GTG indication range, including maximum ash
Each GTG between rank, minimum gray and two GTGs, also with the brightness display range that it is fixed.Generally, show
The high-high brightness of the maximum gray correspondence display device of showing device, the minimum brightness of minimum gray correspondence display device.Based on
Upper setting, in the present invention, obtains the high-high brightness L that display device maximum gray corresponding brightness is display devicemax, minimum ash
The minimum brightness L of rank corresponding brightness and display devicemin。
Next, in step s 102, obtaining the corresponding pixel position of Luminance Distribution and its minimum brightness of input two field picture
Put.
Specifically, for each input two field picture, the GTG and monochrome information of each of which location of pixels can be obtained, from
And obtain the Luminance Distribution information of whole two field picture, it is possible to obtain the position of least bright pixels in the two field picture.
In the corresponding location of pixels of minimum brightness in obtaining a two field picture, searching algorithm can be taken.Specifically, initial
During remember present frame (0,0) pixel correspondence minimum brightness, be currency when search more low value to update minimum brightness coordinate.
When whole two field picture has multiple minimum brightness, first pixel coordinate for searching only is taken for brightness minimum coordinate (M, N).
Next, in step s 103, to be input into all pixels of two field picture respectively in the first direction with second direction meter
Calculate brightness step.
In one embodiment of the invention, first direction and second direction are respectively parallel to adjacent the two of indicator screen
Side, wherein, first direction and second direction are vertical, and with level to the right and straight down as positive direction, as shown in Figure 2.This
The level at place to vertically to the horizontal direction and vertical direction defined on the basis of in face of orientation substrate.Certainly, herein
One direction and second direction can also as needed be designed as other directions.
This is illustrated as a example by sentencing direction as shown in Figure 2, is marked in first direction and second direction such as figure, (M, N)
The corresponding coordinate of pixel intensity minimum in the two field picture is represented, (m, n) represents the corresponding coordinate of any pixel in the two field picture.
The brightness step of the first direction of coordinate (m, n) respective pixel can be calculated by following formula：
D1 ' (m, n)=and L (m+1, n)-L (m, n) }/L (m, n) (1)
Wherein, D1 ' (m, n) represents first direction brightness step, and (m+1, n) (m+1, n) respective pixel is bright for denotation coordination for L
Degree, the brightness of L (m, n) denotation coordination (m, n) respective pixel.
The brightness step of the second direction of coordinate (m, n) respective pixel can be calculated by following formula：
D2 ' (m, n)={ L (m, n+1)-L (m, n) }/L (m, n) (2)
Wherein, D2 ' (m, n) represent second direction brightness step, L (m, n+1) denotation coordination (m, n+1) respective pixel it is bright
Degree.
Next, in step S104, treatment is compressed to brightness step using gradient compression function.
Gradient compression function f (x) requirement for using in the present invention has significant feature, can carry to a certain extent
The Grad of height brightness step, so that the details for improving the gradual area of brightness is presented ability, while being significantly compression high brightness gradient
Grad, so as to reduce the contrast coverage in Liang An great changes area, play the effect of compression dynamic contrast.
In one embodiment of the invention, the gradient compression function of use is expressed as：
F (x)=A*x1/B (3)
Wherein, A is real number, and B is positive integer, and x is brightness step.Its corresponding canonical schema and the relative pass with y=x
System is as shown in Figure 3, it is clear that when Grad is smaller, D1 " (m, n)>D1 ' (m, n), enhancing details is presented ability, and Grad is larger
When, D1 " (m, n)<D1 ' (m, n), the compression gradient absolute value contrast range limited to adapt to traditional monitor.D1”(m,n)
Brightness step after expression compression treatment, D1 " (m, n) and dealing with relationship for D1 ' (m, n) are expressed as D1 " (m, n)=f (D1 ' (m,
n))。
Next, in step S105, the corresponding location of pixels of assignment minimum brightness be minimum gray corresponding brightness and with
Brightness step after compression is processed centered on it reconstructs whole two field picture with second direction in the first direction respectively.
Specifically, obtaining current pixel (x, y) correspondence first direction and the second direction adjacent pixel in positive direction first
Brightness step.Then distinguish the positive direction of positive direction in the first direction and second direction, brightness according to adjacent pixel and
Brightness step calculates the brightness of current pixel, and the brightness of current pixel can be calculated using following formula：
L (x, y)={ L (x-1, y) (1+D1'(x-1, y))+L (x, y-1) (1+D2'(x, y-1)) }/2 (4)
Wherein, L (x, y) denotation coordination is the brightness of the pixel of (x, y), and (x-1, y) denotation coordination is (x-1, picture y) to L
Element brightness, L (x, y-1) denotation coordination for (x, y-1) pixel brightness, D1'(x-1, y) denotation coordination for (x, y) picture
Element and coordinate be (x-1, the brightness step of pixel y), D2'(x, y-1) denotation coordination for (x, y) pixel and coordinate for (x,
The brightness step of pixel y-1), as shown in Figure 2.
Next, in step s 106, obtaining the high-high brightness of whole two field picture after reconstruct, and combine display maximum gray
Corresponding brightness calculates proportionality coefficient.
Specifically, calculating the proportionality coefficient using following formula：
K=Lmax/Lummax (5)
Wherein, k represents proportionality coefficient, LmaxRepresent display device maximum gray corresponding brightness, LummaxRepresent whole two field picture
High-high brightness.
Next, in step s 107, gradient compression function described in adoption rate coefficient amendment, and with revised gradient
Compression function is repeated once output display after step S104 and S105.
Specifically, adoption rate coefficient passes through following formula modifying gradient compression function：
F ' (x)=k*f (x) (6)
Wherein, f (x) represents gradient compression function, and f ' (x) represents revised gradient compression function.
After by gradient compression function amendment, return to step S104, using revised gradient compression function to brightness ladder
Degree is compressed treatment, and afterwards into step S105, the brightness step after being processed using the compression of modifying gradient function is along first
Direction and second direction reconstruct whole two field picture, finally export the image after reconstruct.It is noted that only need to circulation herein holding
Row step S104 and S105 are once.By more than process, by reconstruct after whole two field picture high-high brightness correspond to display
Maximum gray so that whole two field picture has maximum brightness coverage, and then obtain well-bedded topography
Details.
While it is disclosed that implementation method as above, but described content is only to facilitate understanding the present invention and adopting
Implementation method, is not limited to the present invention.Any those skilled in the art to which this invention pertains, are not departing from this
On the premise of the disclosed spirit and scope of invention, any modification and change can be made in the formal and details implemented,
But scope of patent protection of the invention, must be still defined by the scope of which is defined in the appended claims.
Claims (10)
1. a kind of tone of high dynamic contrast image maps and display methods, including：
S101, acquisition display maximum gray corresponding brightness and minimum gray corresponding brightness；
S102, the Luminance Distribution and its corresponding location of pixels of minimum brightness that obtain input two field picture；
S103, all pixels to being input into two field picture calculate brightness step with second direction in the first direction respectively；
S104, treatment is compressed to the brightness step using gradient compression function；
S105, the corresponding location of pixels of assignment minimum brightness are minimum gray corresponding brightness, and are processed compression centered on it
Brightness step afterwards reconstructs whole two field picture along the first direction and the second direction respectively；
S106, the high-high brightness for obtaining whole two field picture after reconstruct, and combine display maximum gray corresponding brightness calculating ratio system
Number；
S107, using gradient compression function described in the proportionality coefficient amendment, and with revised gradient compression function repeat one
Output display after secondary step S104 and S105.
2. method according to claim 1, it is characterised in that the first direction and the second direction are set as difference
Parallel to the adjacent both sides of indicator screen, wherein, the first direction and the second direction are vertical, and with level to the right
And straight down be positive direction.
3. method according to claim 1, it is characterised in that the gradient compression function is expressed as：
F (x)=A*x1/B
Wherein, A is real number, and B is positive integer, and x is brightness step.
4. method according to claim 3, it is characterised in that obtain the high-high brightness of whole two field picture after reconstruct, and combine
Display maximum gray corresponding brightness calculates proportionality coefficient and further includes to calculate the proportionality coefficient k using following formula：
K=Lmax/Lummax
Wherein, LmaxRepresent display device maximum gray corresponding brightness, LummaxRepresent whole two field picture high-high brightness.
5. method according to claim 4, it is characterised in that using gradient compression function described in the proportionality coefficient amendment
Further include：
F ' (x)=k*f (x)
Wherein, f (x) represents gradient compression function, and f ' (x) represents revised gradient compression function.
6. method according to claim 2, it is characterised in that using following formula to being input into all pixels of two field picture edge respectively
First direction and second direction calculate brightness step：
D1 ' (m, n)=and L (m+1, n)-L (m, n) }/L (m, n)
D2 ' (m, n)={ L (m, n+1)-L (m, n) }/L (m, n)
Wherein, D1 ' (m, n) represents first direction brightness step, and D2 ' (m, n) represents second direction brightness step, L (m+1, n) table
Show that (m+1, the n) brightness of respective pixel, the brightness of L (m, n+1) denotation coordination (m, n+1) respective pixel, L (m, n) is represented coordinate
The brightness of coordinate (m, n) respective pixel.
7. method according to claim 6, it is characterised in that reconstructed along the first direction and the second direction respectively
Whole two field picture is further included：
Obtain the brightness step of the current pixel correspondence first direction and the second direction adjacent pixel in positive direction；
Respectively along the positive direction and the positive direction of the second direction of the first direction, according to the brightness and brightness of adjacent pixel
The brightness of gradient calculation current pixel.
8. method according to claim 7, it is characterised in that brightness and brightness step according to adjacent pixel, and use
Following formula calculates the brightness of current pixel：
L (x, y)={ L (x-1, y) (1+D1'(x-1, y))+L (x, y-1) (1+D2'(x, y-1)) }/2
Wherein, L (x, y) denotation coordination is the brightness of the pixel of (x, y), L (x-1, y) denotation coordination for (x-1, pixel y)
Brightness, L (x, y-1) denotation coordination for (x, y-1) pixel brightness, D1'(x-1, y) denotation coordination for (x, y) pixel with
Coordinate is (x-1, the brightness step of pixel y), D2'(x, y-1) denotation coordination for the pixel and coordinate of (x, y) are (x, y-1)
Pixel brightness step.
9. method according to claim 1, it is characterised in that the corresponding pixel of the minimum brightness is obtained using search method
Position.
10. method according to claim 9, it is characterised in that when same input two field picture includes multiple minimum brightnesses
During corresponding location of pixels, the corresponding location of pixels of first minimum brightness for searching is taken.
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100157078A1 (en) * | 2008-12-19 | 2010-06-24 | Qualcomm Incorporated | High dynamic range image combining |
| CN101908207A (en) * | 2010-07-26 | 2010-12-08 | 北京理工大学 | Brightness stratification-based quick trilateral filter tone mapping method |
| CN102938837A (en) * | 2012-09-19 | 2013-02-20 | 中山大学 | Tone mapping method based on edge preservation total variation model |
| CN103400342A (en) * | 2013-07-04 | 2013-11-20 | 西安电子科技大学 | Mixed color gradation mapping and compression coefficient-based high dynamic range image reconstruction method |
| CN104751432A (en) * | 2015-03-09 | 2015-07-01 | 电子科技大学 | Image reconstruction based visible light and infrared image fusion method |
| CN105869112A (en) * | 2016-04-20 | 2016-08-17 | 西安理工大学 | Method for tone mapping of high dynamic range picture with edge kept minimized |
-
2016
- 2016-12-29 CN CN201611244390.2A patent/CN106847149B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100157078A1 (en) * | 2008-12-19 | 2010-06-24 | Qualcomm Incorporated | High dynamic range image combining |
| CN101908207A (en) * | 2010-07-26 | 2010-12-08 | 北京理工大学 | Brightness stratification-based quick trilateral filter tone mapping method |
| CN102938837A (en) * | 2012-09-19 | 2013-02-20 | 中山大学 | Tone mapping method based on edge preservation total variation model |
| CN103400342A (en) * | 2013-07-04 | 2013-11-20 | 西安电子科技大学 | Mixed color gradation mapping and compression coefficient-based high dynamic range image reconstruction method |
| CN104751432A (en) * | 2015-03-09 | 2015-07-01 | 电子科技大学 | Image reconstruction based visible light and infrared image fusion method |
| CN105869112A (en) * | 2016-04-20 | 2016-08-17 | 西安理工大学 | Method for tone mapping of high dynamic range picture with edge kept minimized |
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