CN105611196B - Dead pixel points of images compensation method, device and terminal device - Google Patents
Dead pixel points of images compensation method, device and terminal device Download PDFInfo
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Abstract
The present invention proposes a kind of dead pixel points of images compensation method, device and terminal device, wherein, the imaging sensor being provided previously by includes：Photosensitive pixel array, and the optical filter being arranged on photosensitive pixel array, optical filter include filter unit array, and each filter unit covers m*n photosensitive pixel and constitutes merging pixel, wherein m*n>1；Method includes：When the output for reading the photosensitive pixel array generates full size image, whether the first photosensitive pixel that current detection is determined according to preset strategy is bad point；If it is determined that first photosensitive pixel is bad point, then first belonged to according to first photosensitive pixel merges the output of the output compensation bad point of normal point in pixel.The detection to bad point on imaging sensor and compensation are realized, the quality and definition of output image is improved.
Description
Technical field
Set the present invention relates to technical field of image processing, more particularly to a kind of dead pixel points of images compensation method, device and terminal
It is standby.
Background technology
With the development of science and technology and manufacturing process, the pixel of imaging sensor increasingly increases, the picture of so big quantity
Element inevitably produces bad point during the manufacturing.Bad point in sensor, refers to its numerical value not with illuminance
Change, is presented the pixel of same color all the time.The presence of bad point, can substantially reduce the quality of image, detect bad point, and to bad
Point is compensated, it is possible to increase the quality of image.
At present, management and control is carried out to the quality of imaging sensor according to bad point number, if bad point number exceedes predetermined threshold value,
The product is unable to shipment；Another management and control parameter of bad point is the bad point number no more than threshold in any unit area simultaneously
Value, such management and control scope is to prevent bad point from excessively concentrating, excessively concentrate some region entirety of image can be caused completely black or
Quan Bai, it is impossible to recognize.Even if but the bad point in so management and control, the imaging sensor dispatched from the factory exists all the time.The presence of bad point, meeting
Substantially reduce the quality of image.
The content of the invention
It is contemplated that at least solving one of technical problem in correlation technique to a certain extent.
Therefore, first purpose of the present invention is to propose a kind of dead pixel points of images compensation method, it the method achieve to figure
As the detection and compensation of bad point on sensor, the quality and definition of output image are improved.
Second object of the present invention is to propose a kind of dead pixel points of images compensation device.
Third object of the present invention is to propose a kind of terminal device.
For up to above-mentioned purpose, first aspect present invention embodiment proposes a kind of dead pixel points of images compensation method, including：In advance
The imaging sensor of offer includes：Photosensitive pixel array, and the optical filter being arranged on the photosensitive pixel array, wherein,
The optical filter includes filter unit array, and each filter unit covers m*n photosensitive pixel and constitutes merging pixel, wherein m*
n>1；It the described method comprises the following steps：
When the output for reading the photosensitive pixel array generates full size image, current detection is determined according to preset strategy
The first photosensitive pixel whether be bad point；If it is determined that first photosensitive pixel is bad point, then according to first photosensitive pixel
The first of ownership merges the output of the output compensation bad point of normal point in pixel.
The dead pixel points of images compensation method of the embodiment of the present invention, when the output generation for reading the photosensitive pixel array is full-scale
During image, whether the first photosensitive pixel that current detection is determined according to preset strategy is bad point；If it is determined that first light-sensitive image
Element is bad point, then the output that first belonged to according to first photosensitive pixel merges normal point in pixel compensates the bad point
Output.Hereby it is achieved that detection and compensation to bad point on imaging sensor, improve the quality and definition of output image.
For up to above-mentioned purpose, second aspect of the present invention embodiment proposes a kind of dead pixel points of images compensation device, including：Image
Sensor and image processor, wherein,
Described image sensor includes：Photosensitive pixel array, and the optical filter being arranged on the photosensitive pixel array,
Wherein, the optical filter includes filter unit array, and each filter unit covers m*n photosensitive pixel and constitutes merging pixel,
Wherein m*n>1；
Described image processor includes：First detection module, for when the output generation for reading the photosensitive pixel array
During full size image, whether the first photosensitive pixel that current detection is determined according to preset strategy is bad point；First compensating module, is used
In if it is determined that first photosensitive pixel is bad point, then first belonged to according to first photosensitive pixel merges normal in pixel
The output of the output compensation bad point of point.
The dead pixel points of images compensation device of the embodiment of the present invention, when the output generation for reading the photosensitive pixel array is full-scale
During image, whether the first photosensitive pixel that current detection is determined according to preset strategy is bad point；If it is determined that first light-sensitive image
Element is bad point, then the output that first belonged to according to first photosensitive pixel merges normal point in pixel compensates the bad point
Output.Hereby it is achieved that detection and compensation to bad point on imaging sensor, improve the quality and definition of output image.
For up to above-mentioned purpose, third aspect present invention embodiment proposes a kind of terminal device, including figure as described above
As compensating bad point device.
The terminal device of the embodiment of the present invention, when the output for reading the photosensitive pixel array generates full size image,
Whether the first photosensitive pixel that current detection is determined according to preset strategy is bad point；If it is determined that first photosensitive pixel is bad
Point, then first belonged to according to first photosensitive pixel merges the output of the output compensation bad point of normal point in pixel.
Hereby it is achieved that detection and compensation to bad point on imaging sensor, improve the quality and definition of output image.
Brief description of the drawings
Of the invention above-mentioned and/or additional aspect and advantage will become from the following description of the accompanying drawings of embodiments
Substantially and be readily appreciated that, wherein：
Fig. 1 is the dimensional structure diagram of imaging sensor provided in an embodiment of the present invention；
Fig. 2 is the flow chart of the dead pixel points of images compensation method of one embodiment of the invention；
Fig. 3 is the flow chart of the dead pixel points of images compensation method of one embodiment of the invention；
Fig. 4 is the flow chart of the dead pixel points of images compensation method of one embodiment of the invention；
Fig. 5 is that a red filter unit covers multiple photosensitive pixels and constitutes the schematic diagram for merging pixel；
Fig. 6 is the flow chart of the dead pixel points of images compensation method of one embodiment of the invention；
Fig. 7 is the filter unit array schematic diagram in the imaging sensor that the present invention is provided；
Fig. 8 is the merging pel array schematic diagram that the present invention is provided；
Fig. 9 is the flow chart of the dead pixel points of images compensation method of one embodiment of the invention；
Figure 10 is the structural representation of the dead pixel points of images compensation device of one embodiment of the invention；
Figure 11 is the structural representation of the dead pixel points of images compensation device of another embodiment of the present invention；
Figure 12 is the structural representation of the terminal device of one embodiment of the invention；
Figure 13 is the structural representation of the terminal device of another embodiment of the present invention.
Embodiment
Embodiments of the invention are described below in detail, the example of the embodiment is shown in the drawings, wherein from beginning to end
Same or similar label represents same or similar element or the element with same or like function.Below with reference to attached
The embodiment of figure description is exemplary, it is intended to for explaining the present invention, and be not considered as limiting the invention.
Below with reference to the accompanying drawings dead pixel points of images compensation method, device and the terminal device of the embodiment of the present invention described.
Specifically, the dead pixel points of images compensation method that the present embodiment is provided is configured in the terminal device with imaging sensor
In be specifically described.It should be noted that the type of terminal device is a lot, such as：Mobile phone, IPAD, Intelligent worn device etc..
Fig. 1 is the dimensional structure diagram of imaging sensor provided in an embodiment of the present invention.
The imaging sensor 1 set in advance in terminal device, wherein, imaging sensor 1 can be that CCD or CMOS is passed
Sensor.
Referring to Fig. 1, imaging sensor 1 includes：Photosensitive pixel array 11, and be arranged on the photosensitive pixel array 11
Optical filter, wherein, the optical filter includes filter unit array 12, and each filter unit 121 covers m*n photosensitive pixel
111 and constitute merging pixel, wherein m*n>1.
Because ambient brightness is to influence a key factor of imaging sensor image quality, when the brightness of photo environment
When too low, there is excessive image noise in the image of generation so that fogging image.
In order to solve the above problems, the imaging sensor provided based on Fig. 1 in the present embodiment can detect ring of taking pictures in real time
The bright situation in border, it is determined whether according to the output of photosensitive pixel array 11, by m*n photosensitive pixel in same merging pixel
111 output, which is added to obtain, merges pixel value, the image for the bright situation respective pixel that exports and take pictures.
Therefore, the imaging sensor and different image formation modes provided based on above-mentioned Fig. 1, is implemented the present invention and provided
Dead pixel points of images compensation method.It is specific as follows：
Fig. 2 is the flow chart of the dead pixel points of images compensation method of one embodiment of the invention.
As shown in Fig. 2 the present embodiment is the situation that generation full size image is exported for imaging sensor, the dead pixel points of images
Compensation method comprises the following steps：
Step 101, when the output for reading the photosensitive pixel array generates full size image, determined according to preset strategy
Whether the first photosensitive pixel of current detection is bad point.
Specifically, referring to Fig. 1, when the light-inletting quantity of each photosensitive pixel 111 in photosensitive pixel array 11 in imaging sensor
Larger, photosensitive degree is preferable, when the image of output is very clear, without the output to merging m*n photosensitive pixel 111 in pixel
Merge processing.But directly according to the output of each photosensitive pixel in photosensitive pixel array 11, generate full size image.
The full size image generated for imaging sensor, the first photosensitive pixel of current detection is determined according to preset strategy
Whether it is bad point.Wherein it is possible to set different inspection policies according to specific application scenarios, the first sense of current detection is determined
Whether light pixel is bad point, is illustrated below：
Inspection policies can be the output for the first photosensitive pixel that current detection is matched by default data area, its
In, default data area can be determined according to the output of the photosensitive pixel adjacent with the first photosensitive pixel, wherein, it is adjacent
Photosensitive pixel filter unit color corresponding with the first photosensitive pixel it is identical.
If the output of the first photosensitive pixel is in default data area, it is determined that the first photosensitive pixel is normal point；
If the output of the first photosensitive pixel is not in default data area, it is determined that the first photosensitive pixel is bad point.
Step 102, however, it is determined that first photosensitive pixel is bad point, then first belonged to according to first photosensitive pixel
Merge the output of the output compensation bad point of normal point in pixel.
If it is determined that the first photosensitive pixel of current detection is bad point, then first belonged to according to the first photosensitive pixel merges
The output of the output compensation bad point (i.e. the first photosensitive pixel) of normal point in pixel.
It should be noted that because the first merging pixel that the first photosensitive pixel belongs to covers m*n photosensitive pixel
111, wherein m*n>1.With m*n change, first merges the quantity and the number of normal point of the photosensitive pixel 111 of pixel covering
Amount is also different.Therefore, the mode compensated to bad point according to the output of normal point is also different.
After output by the output of normal point in the first merging pixel to bad point (i.e. the first photosensitive pixel) is compensated,
The output of the first photosensitive pixel is set to meet normal data area, it is to avoid bright spot or the corresponding output of dim spot to be used, so as to carry
The quality and definition of height output image.
The dead pixel points of images compensation method that the present embodiment is provided, when the output generation for reading the photosensitive pixel array is full-scale
During image, whether the first photosensitive pixel that current detection is determined according to preset strategy is bad point, however, it is determined that first light-sensitive image
Element is bad point, then the output that first belonged to according to first photosensitive pixel merges normal point in pixel compensates the bad point
Output.The detection to the bad point on imaging sensor and compensation are realized, the quality and definition of output image is improved.
Based on above-described embodiment, because the first merging pixel that the first photosensitive pixel belongs to covers m*n photosensitive pixel
111, wherein m*n>1.With m*n change, first merges the quantity and the number of normal point of the photosensitive pixel 111 of pixel covering
Amount is also different.It therefore, it can set different strategy detection bad points, and bad point compensated.It is described as follows：
Fig. 3 is the flow chart of the dead pixel points of images compensation method of one embodiment of the invention.
As shown in figure 3, the present embodiment is directed to as m*n=2, the first of current first photosensitive pixel ownership to be detected closes
And pixel includes：First photosensitive pixel of current detection and second photosensitive pixel, for step 101, when the reading sense
During the output generation full size image of light image pixel array, the dead pixel points of images compensation method comprises the following steps：
Step 201, the first average is obtained according to the output of first photosensitive pixel and second photosensitive pixel.
Step 202, output and the first poor absolute value of first average of first photosensitive pixel are obtained.
Step 203, if first absolute value is more than or equal to default first threshold, it is determined that first light-sensitive image
Element is bad point.
Step 204, the output of first photosensitive pixel is replaced with into the output of second photosensitive pixel.
Specifically, the present embodiment covers the situation of m*n=2 photosensitive pixel for each filter unit, then Mei Gehe
And pixel includes two pixels.Accordingly, it is emphasized that, the present embodiment is at most only having in each merging pixel
The situation of one bad point is illustrated, if each merging in pixel has two bad points, does not meet the management and control ginseng of product export
Number, therefore it is not belonging to the scope that the present invention is discussed.
The present embodiment is mainly merges average the first photosensitive pixel of detection that each photosensitive pixel is exported in pixel according to first
Whether it is bad point, detailed process is as follows：
First, obtained according to the output of the first photosensitive pixel of current detection and the output of another the second photosensitive pixel
First average.Then, output and the first poor absolute value of first average of the first photosensitive pixel of current detection are obtained.
Compare the size of the first absolute value and default first threshold, wherein, the set-up mode of first threshold has a lot, can
To be set or be generated according to default mathematical modeling according to experimental data, for example：It is equal according to above-mentioned first
Value and default first coefficient determine the first threshold, wherein, first coefficient is more than 0 and less than 1.
Know that the first absolute value is more than or equal to default first threshold if compared, it is determined that the first photosensitive pixel is bad
Point, and the output of first photosensitive pixel is replaced with to the output of second photosensitive pixel, so as to be mended to bad point
Repay.Know that the first absolute value is less than default first threshold if compared, it is determined that the first photosensitive pixel is normal point, it is not necessary to
Compensate.
The dead pixel points of images compensation method that the present embodiment is provided, when the output generation for reading the photosensitive pixel array is full-scale
During image, the first average is obtained according to the output of first photosensitive pixel and second photosensitive pixel, described first is obtained
The output of photosensitive pixel and the first poor absolute value of first average, if first absolute value is more than or equal to default
First threshold, it is determined that first photosensitive pixel is bad point, and the output of first photosensitive pixel is replaced with into described second
The output of photosensitive pixel.The detection to bad point on imaging sensor and compensation are realized, the quality of output image is improved and clear
Clear degree.
Fig. 4 is the flow chart of the dead pixel points of images compensation method of one embodiment of the invention.
As shown in figure 4, the present embodiment is for working as m*n>When=4, the first of current first photosensitive pixel ownership to be detected
Merging pixel includes：First photosensitive pixel of current detection and multiple second photosensitive pixels, it is described when reading for step 101
During the output generation full size image of photosensitive pixel array, the dead pixel points of images compensation method comprises the following steps：
Step 301, according to the output of the multiple second photosensitive pixel, it is determined that the output adjacent with maximum output Rmax
Rmax-1。
Step 302, output and Rmax-1 the second poor absolute value of first photosensitive pixel are obtained.
Step 303, judge whether second absolute value is less than default Second Threshold, if it is not, step 304 is performed, if
It is to perform step 305.
Step 304, it is bad point to determine first photosensitive pixel, and the output of first photosensitive pixel is replaced with
Rmax-1。
Step 305, it is determined that the output Rmin+1 adjacent with minimum output Rmin.
Step 306, output and Rmin+1 the 3rd poor absolute value of first photosensitive pixel are obtained.
Step 307, if the 3rd absolute value is more than or equal to default 3rd threshold value, it is determined that first light-sensitive image
Element is bad point.
Step 308, the output of first photosensitive pixel is replaced with into Rmin+1.
Specifically, the present embodiment covers m*n for each filter unit>The situation of=4 photosensitive pixels, then Mei Gehe
And pixel includes at least four pixels.Accordingly, it is emphasized that, the present embodiment is to merge for each in pixel at most
The situation of only two bad points is illustrated, if each merging in pixel has more than two bad points, is not met product and is gone out
The management and control parameter of factory, therefore it is not belonging to the scope that the present invention is discussed.
The present embodiment is mainly determines current detection according to the first output for merging multiple second photosensitive pixels in pixel
Whether the first photosensitive pixel is bright spot type in bad point, if bright spot, it is determined that the first photosensitive pixel is bad point, if not
It is bright spot, then determines whether the first photosensitive pixel is dim spot type in bad point, if dim spot, it is determined that the first photosensitive pixel
It is bad point, detailed process is as follows：
Fig. 5 is that a red filter unit covers multiple photosensitive pixels and constitutes the schematic diagram for merging pixel.
Merge picture referring to shown in Fig. 1 and Fig. 5, red filter unit 121 covers m*n photosensitive pixel 111 and constitutes first
Element, wherein, m*n>=4.Assuming that the point of current detection is the Rij in the first merging pixel, comprise the following steps that：
First, the output that first merges remaining m*n-1 the second photosensitive pixels in pixel is arranged as follows in sequence
(for example sorting from small to large)：Rmin, Rmin+1, Rmin+2......Rmax-2, Rmax-1, Rmax；
Then, it is determined that the output Rmax-1 adjacent with maximum output Rmax, obtains output and the Rmax- of the first photosensitive pixel
1 the second poor absolute value.
And then, judge whether the second absolute value is less than default Second Threshold, wherein, the set-up mode of Second Threshold has very
It is many, it is being set according to experimental data or generated according to default mathematical modeling, for example：
Second average is obtained according to the output that first merges remaining m*n-1 the second photosensitive pixels in pixel, according to institute
State the second average and default second coefficient determines the Second Threshold, wherein, second coefficient is more than 0 and less than 1.
If it is determined that the second absolute value is more than or equal to default Second Threshold, it is determined that first photosensitive pixel is bright
Point, i.e. the first photosensitive pixel are bad point, the output of first photosensitive pixel are replaced with into Rmax-1, so as to be mended to bad point
Repay.
Further, if it is determined that the second absolute value is less than default Second Threshold, it is determined that the first photosensitive pixel is not
Bright spot, and then detect whether the first photosensitive pixel is dim spot, it is specially：
First, the adjacent output Rmin+1 of minimum output Rmin are determined in the order described above, obtain first light-sensitive image
The output of element and Rmin+1 the 3rd poor absolute value.
And then, judge whether the 3rd absolute value is less than default 3rd threshold value, wherein, the set-up mode of the 3rd threshold value has very
It is many, it is being set according to experimental data or generated according to default mathematical modeling, for example：
Second average is obtained according to the output that first merges remaining m*n-1 the second photosensitive pixels in pixel, according to institute
State the second average and default 3rd coefficient determines the 3rd threshold value, wherein, the 3rd coefficient is more than 0 and less than 1.
If it is determined that the 3rd absolute value is more than or equal to default 3rd threshold value, it is determined that the first photosensitive pixel is dim spot, i.e.,
First photosensitive pixel is bad point.The output of first photosensitive pixel is replaced with into Rmin+1, so as to be compensated to bad point.
If it is determined that the 3rd absolute value is less than default 3rd threshold value, it is determined that the first photosensitive pixel neither bright spot not yet
It is dim spot, i.e. the first photosensitive pixel is normal point, it is not necessary to compensate processing.
The dead pixel points of images compensation method that the present embodiment is provided, when the output generation for reading the photosensitive pixel array is full-scale
During image, detect whether the first photosensitive pixel is bright according to the first adjacent output Rmax-1 merged in pixel with maximum output
Point, if it is, being compensated with Rmax-1 to the first merging pixel, if it is not, further according in the first merging pixel and most
The adjacent output Rmin+1 of small output detects whether the first photosensitive pixel is dim spot, if it is, being closed with Rmin+1 to first
And pixel is compensated.The detection to bad point on imaging sensor and compensation are realized, the quality of output image is improved and clear
Clear degree.
Fig. 6 is the flow chart of the dead pixel points of images compensation method of one embodiment of the invention.
As shown in fig. 6, the present embodiment is to export the situation that generation merges image for imaging sensor, the dead pixel points of images is mended
Compensation method comprises the following steps：
Step 401, it is photosensitive by m*n belonged in same merging pixel when the output according to the photosensitive pixel array
When the output of pixel is added acquisition merging pixel value generation merging image, determine current detection according to preset strategy first merges
Whether pixel is bad point.
Specifically, referring to Fig. 1, when each photosensitive pixel 111 in photosensitive pixel array 11 is known in imaging sensor in detection
Light-inletting quantity it is smaller, photosensitive degree is poor, and image noise is more, cause output image it is very unclear.Accordingly, it would be desirable to according to
The output of each photosensitive pixel 111 in photosensitive pixel array 11, the output of multiple photosensitive pixels in same merging pixel is carried out
Merging treatment generation merges image, to improve light-inletting quantity, makes up the not enough defect of single photosensitive pixel light-inletting quantity, improves output figure
The definition of picture.
For the merging image of imaging sensor generation, the first merging pixel for determining current detection according to preset strategy is
No is bad point.Wherein it is possible to set different inspection policies according to specific application scenarios, determine that the first of current detection merges
Whether pixel is bad point, is illustrated below：
Inspection policies can be to match the first of the current detection merging for merging pixel by default data area to merge
Pixel value, wherein, default data area can be determined according to the output of the merging pixel adjacent with the first merging pixel,
Wherein, adjacent merging pixel filter unit color corresponding with the first merging pixel is identical.
If first merges the merging pixel value of pixel in default data area, it is determined that first merges pixel for just
Chang Dian；If first merges the merging pixel value of pixel not in default data area, it is determined that the first merging pixel is bad
Point.
Step 402, however, it is determined that described first to merge pixel be bad point, then merge adjacent many of pixel according to described first
Individual second merges the output for merging bad point described in pixel compensation value of pixel, wherein, described first merges pixel and described second
Merge the filter unit of pixel correspondence same color.
If it is determined that the first of current detection to merge pixel be bad point, then according to first to merge pixel adjacent multiple the
Two merge the output of the merging pixel compensation value bad point (i.e. first merges pixel) of pixel, wherein, first merges pixel and second
Merge the filter unit of pixel correspondence same color.
It is emphasized that the merging of the multiple second merging pixels adjacent with the described first merging pixel mentioned above
Pixel value can merge pixel for multiple second in preset range, for example：In 5*5 matrixes centered on the first merging pixel
It is multiple second merge pixels.
The merging pixel value of bad point (the i.e. first merging pixel) is entered by the merging pixel value of the multiple second merging pixels
After row compensation, the merging pixel value of the first merging pixel is set to meet normal data area, it is to avoid to use bright spot or dim spot pair
The output answered, so as to improve the quality and definition of output image.
The dead pixel points of images compensation method that the present embodiment is provided, it is same by belonging to when the output according to the photosensitive pixel array
When the one output addition acquisition merging pixel value generation for merging m*n photosensitive pixel in pixel merges image, according to default plan
Slightly determine that the first of current detection merges whether pixel is bad point, it is if bad point, then adjacent according to pixel is merged with described first
It is multiple second merge pixels merge pixel compensation value described in bad point output, wherein, it is described first merge pixel with it is described
Second merges the filter unit of pixel correspondence same color.Realize the bad point detection and benefit to merging pixel on imaging sensor
Repay, improve the quality and definition of the merging image of output.
In order to more clearly describe the bad point detection to merging pixel and compensation, it is described as follows with reference to Fig. 7-Fig. 9：
Fig. 7 is the filter unit array schematic diagram in the imaging sensor that the present invention is provided.
Fig. 8 is the merging pel array schematic diagram that the present invention is provided.
Referring to Fig. 1 and Fig. 7, illustrated so that each filter unit 121 covers 2*2 photosensitive pixel 111 as an example：
The output for the 2*2 photosensitive pixel that each filter unit 121 is covered is added, in other words, will be adjacent respectively
The output of color identical photosensitive pixel merge into a monochromatic pixel.Due to the fine difference of illumination, each photosensitive pixel
Output corresponding to 111 may also be different, therefore merge the output integrated output of its 2*2 photosensitive pixel 111 of pixel.It is raw
Into the pixel of image be reduced by as original 1/4, referring to Fig. 8.
For example：If the photosensitive pixel array of imaging sensor is 16M, the 2*2 that each filter unit 121 is covered photosensitive
Pixel 111 and the merging pixel constituted, the output of 4 photosensitive pixels in each merging pixel is added and reads merging pixel
Value, the pixel of the image of generation is reduced by as 4M.
Fig. 9 is the flow chart of the dead pixel points of images compensation method of one embodiment of the invention.
As shown in figure 9, the present embodiment is the merging pel array for Fig. 8, the dead pixel points of images compensation method includes following
Step：
Step 501, the 3rd is obtained according to multiple second merging pixel values for merging pixel adjacent with the first merging pixel
Average.
Step 502, obtain first and merge the merging pixel value of pixel and the 4th poor absolute value of the 3rd average.
Step 503, if the 4th absolute value is more than or equal to default 4th threshold value, it is determined that described first, which merges pixel, is
Bad point, the 3rd average is replaced with by the output of the described first merging pixel.
Specifically, for the merging pel array shown in Fig. 8, it is assumed that Ra merges pixel for the first of current detection, according to
It is multiple with first merge pixel it is adjacent second merge pixels merging pixel values obtain the 3rd average, that is, ask for Rb, Rd, Re,
4 pixel of Rf average ravg=(Rb+Rd+Re+Rf)/4；
Determine the 4th threshold value previously according to the 3rd average and default 4th coefficient, wherein, the 4th coefficient be more than 0 and
Less than 1.That is the 4th threshold value rth=ravg*0.2 (coefficient is it is assumed herein that be 0.2)
Obtain first and merge the merging pixel value of pixel and the 4th poor absolute value of the 3rd average, if the 4th absolute value
More than or equal to default 4th threshold value, it is determined that described first merges pixel for bad point.By the described first output for merging pixel
Replace with the 3rd average.Even | Ra-ravg | less than or equal to rth, then Ra is normal point, is not required to compensation, if | Ra-ravg |
More than rth, then it is bad point to show Ra, replaces Ra to compensate with ravg.
In order to realize above-described embodiment, the present invention also proposes a kind of dead pixel points of images compensation device.
Figure 10 is the structural representation of the dead pixel points of images compensation device of one embodiment of the invention.
Shown in Figure 10, the dead pixel points of images compensation device includes：
Imaging sensor 1 and image processor 2, wherein,
The concrete structure of described image sensor 1 is specifically included referring to Fig. 1：Photosensitive pixel array 11, and be arranged on described
Optical filter on photosensitive pixel array 11, wherein, the optical filter includes filter unit array 12, and each filter unit 121 covers
M*n photosensitive pixel 111 of lid simultaneously constitutes merging pixel, wherein m*n>1；
Described image processor 2 includes：
First detection module 21, for detecting whether photo environment reaches predetermined luminance；
First compensating module 22, for if it is determined that first photosensitive pixel is bad point, then according to first light-sensitive image
The first of element ownership merges the output of the output compensation bad point of normal point in pixel.
In one embodiment, as m*n=2, the first merging pixel includes：First photosensitive pixel of current detection
With second photosensitive pixel；
The first detection module 21 is used for：
First average is obtained according to the output of first photosensitive pixel and second photosensitive pixel；
Obtain output and the first poor absolute value of first average of first photosensitive pixel；
If first absolute value is more than or equal to default first threshold, it is determined that first photosensitive pixel is bad
Point；
First compensating module 22 is used for：
The output of first photosensitive pixel is replaced with into the output of second photosensitive pixel.
Further, the first detection module 21 is additionally operable to：
The first threshold is determined according to first average and default first coefficient, wherein, first coefficient is big
In 0 and less than 1.
In another embodiment, m*n is worked as>When=4, the first merging pixel includes：The first of current detection is photosensitive
Pixel and multiple second photosensitive pixels；
The first detection module 21 is used for：
According to the output of the multiple second photosensitive pixel, it is determined that the output Rmax-1 adjacent with maximum output Rmax；
Obtain output and Rmax-1 the second poor absolute value of first photosensitive pixel；
If second absolute value is more than or equal to default Second Threshold, it is determined that first photosensitive pixel is bad
Point；
First compensating module 22 is used for：
The output of first photosensitive pixel is replaced with into Rmax-1.
Further, the first detection module 21 is additionally operable to：
If second absolute value is less than the Second Threshold, it is determined that the output Rmin adjacent with minimum output Rmin
+1；
Obtain output and Rmin+1 the 3rd poor absolute value of first photosensitive pixel；
If the 3rd absolute value is more than or equal to default 3rd threshold value, it is determined that first photosensitive pixel is bad
Point；
First compensating module 22 is additionally operable to：
The output of first photosensitive pixel is replaced with into Rmin+1.
Further, the first detection module 21 is additionally operable to：
Second average is obtained according to the output of the multiple second photosensitive pixel；
The Second Threshold is determined according to second average and default second coefficient, wherein, second coefficient is big
In 0 and less than 1；
3rd threshold value is determined according to second average and default 3rd coefficient, wherein, the 3rd coefficient is big
In 0 and less than 1；
It should be noted that the foregoing explanation to dead pixel points of images compensation method embodiment is also applied for the embodiment
Dead pixel points of images compensation device, here is omitted.
The dead pixel points of images compensation device of the embodiment of the present invention, when the output generation for reading the photosensitive pixel array is full-scale
During image, whether the first photosensitive pixel that current detection is determined according to preset strategy is bad point, however, it is determined that first light-sensitive image
Element is bad point, then the output that first belonged to according to first photosensitive pixel merges normal point in pixel compensates the bad point
Output.The detection to the bad point on imaging sensor and compensation are realized, the quality and definition of output image is improved.
Figure 11 is the structural representation of the dead pixel points of images compensation device of another embodiment of the present invention.
As shown in figure 11, based on embodiment illustrated in fig. 10, described image processor 2 also includes：
Second detection module 23, for that when the output according to the photosensitive pixel array, will belong in same merging pixel
The output of m*n photosensitive pixel be added and obtain when merging pixel value generation and merging image, current inspection is determined according to preset strategy
First surveyed merges whether pixel is bad point；
Second compensating module 24, for if it is determined that described first merges pixel for bad point, then basis to merge with described first
The output for merging bad point described in pixel compensation value of the adjacent multiple second merging pixels of pixel, wherein, described first merges picture
The filter unit of plain same color corresponding with the described second merging pixel.
It should be noted that the multiple second merging pixels adjacent with the described first merging pixel, including：
The multiple second merging pixels adjacent with the described first merging pixel in preset range.
In one embodiment, second detection module 23 is used for：
3rd average is obtained according to the merging pixel value that the multiple second merges pixel；
Obtain the described first merging pixel value and the 4th poor absolute value of the 3rd average for merging pixel；
If the 4th absolute value is more than or equal to default 4th threshold value, it is determined that the first merging pixel is bad
Point；
Second compensating module 24 is used for：
The output of described first merging pixel is replaced with into the 3rd average.
Further, second detection module 23 is additionally operable to：
4th threshold value is determined according to the 3rd average and default 4th coefficient, wherein, the 4th coefficient is big
In 0 and less than 1.
It should be noted that the foregoing explanation to dead pixel points of images compensation method embodiment is also applied for the embodiment
Dead pixel points of images compensation device, here is omitted.
The dead pixel points of images compensation device of the embodiment of the present invention, it is same by belonging to when the output according to the photosensitive pixel array
When the one output addition acquisition merging pixel value generation for merging m*n photosensitive pixel in pixel merges image, according to default plan
Slightly determine that the first of current detection merges whether pixel is bad point, it is if bad point, then adjacent according to pixel is merged with described first
It is multiple second merge pixels merge pixel compensation value described in bad point output, wherein, it is described first merge pixel with it is described
Second merges the filter unit of pixel correspondence same color.Realize the bad point detection and benefit to merging pixel on imaging sensor
Repay, improve the quality and definition of the merging image of output.
In order to realize above-described embodiment, the present invention also proposes a kind of terminal device.The terminal device includes：Example is performed as described above
The dead pixel points of images compensation device carried.
Wherein, the terminal equipment type is a lot, for example including：Mobile phone, IPAD or, Intelligent worn device.
It should be noted that the foregoing explanation to dead pixel points of images compensation method embodiment is also applied for the embodiment
Terminal device, here is omitted.
The terminal device of the embodiment of the present invention, when the output for reading the photosensitive pixel array generates full size image,
Whether the first photosensitive pixel that current detection is determined according to preset strategy is bad point, however, it is determined that first photosensitive pixel is bad
Point, then first belonged to according to first photosensitive pixel merges the output of the output compensation bad point of normal point in pixel.
The detection to the bad point on imaging sensor and compensation are realized, the quality and definition of output image is improved.
Figure 12 is the structural representation of the terminal device of one embodiment of the invention, as shown in figure 12, the terminal device bag
Include：Dead pixel points of images compensation device 10, the central processing unit 20 and external memory 30 being connected with described image compensating bad point device 10,
The central processing unit 20 is used to control the storage image of external memory 30.
It should be noted that the foregoing explanation to dead pixel points of images compensation method embodiment is also applied for the embodiment
Terminal device, its realization principle is similar, and here is omitted.
Figure 13 is the structural representation of the terminal device of another embodiment of the present invention, as shown in figure 13, the terminal device
Including：Dead pixel points of images compensation device 10, the central processing unit 20 being connected with described image compensating bad point device 10 and display device
40, the central processing unit 20 is used to control the display image of display device 40.
It should be noted that the foregoing explanation to dead pixel points of images compensation method embodiment is also applied for the embodiment
Terminal device, its realization principle is similar, and here is omitted.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means to combine specific features, structure, material or the spy that the embodiment or example are described
Point is contained at least one embodiment of the present invention or example.In this manual, to the schematic representation of above-mentioned term not
Identical embodiment or example must be directed to.Moreover, specific features, structure, material or the feature of description can be with office
Combined in an appropriate manner in one or more embodiments or example.In addition, in the case of not conflicting, the skill of this area
Art personnel can be tied the not be the same as Example or the feature of example and non-be the same as Example or example described in this specification
Close and combine.
In addition, term " first ", " second " are only used for describing purpose, and it is not intended that indicating or implying relative importance
Or the implicit quantity for indicating indicated technical characteristic.Thus, define " first ", the feature of " second " can express or
Implicitly include at least one this feature.In the description of the invention, " multiple " are meant that at least two, such as two, three
It is individual etc., unless otherwise specifically defined.
Any process described otherwise above or method description are construed as in flow chart or herein, represent to include
Module, fragment or the portion of the code of one or more executable instructions for the step of realizing specific logical function or process
Point, and the scope of the preferred embodiment of the present invention includes other realization, wherein can not be by shown or discussion suitable
Sequence, including according to involved function by it is basic simultaneously in the way of or in the opposite order, carry out perform function, this should be of the invention
Embodiment person of ordinary skill in the field understood.
Represent in flow charts or logic and/or step described otherwise above herein, for example, being considered use
In the order list for the executable instruction for realizing logic function, it may be embodied in any computer-readable medium, for
Instruction execution system, device or equipment (such as computer based system including the system of processor or other can be held from instruction
The system of row system, device or equipment instruction fetch and execute instruction) use, or combine these instruction execution systems, device or set
It is standby and use.For the purpose of this specification, " computer-readable medium " can any can be included, store, communicate, propagate or pass
Defeated program is for instruction execution system, device or equipment or the dress for combining these instruction execution systems, device or equipment and using
Put.The more specifically example (non-exhaustive list) of computer-readable medium includes following：Electricity with one or more wirings
Connecting portion (electronic installation), portable computer diskette box (magnetic device), random access memory (RAM), read-only storage
(ROM), erasable edit read-only storage (EPROM or flash memory), fiber device, and portable optic disk is read-only deposits
Reservoir (CDROM).In addition, can even is that can be in the paper of printing described program thereon or other are suitable for computer-readable medium
Medium, because can then enter edlin, interpretation or if necessary with it for example by carrying out optical scanner to paper or other media
His suitable method is handled electronically to obtain described program, is then stored in computer storage.
It should be appreciated that each several part of the present invention can be realized with hardware, software, firmware or combinations thereof.Above-mentioned
In embodiment, the software that multiple steps or method can in memory and by suitable instruction execution system be performed with storage
Or firmware is realized.If, and in another embodiment, can be with well known in the art for example, realized with hardware
Any one of row technology or their combination are realized：With the logic gates for realizing logic function to data-signal
Discrete logic, the application specific integrated circuit with suitable combinational logic gate circuit, programmable gate array (PGA), scene
Programmable gate array (FPGA) etc..
Those skilled in the art are appreciated that to realize all or part of step that above-described embodiment method is carried
Rapid to can be by program to instruct the hardware of correlation to complete, described program can be stored in a kind of computer-readable storage medium
In matter, the program upon execution, including one or a combination set of the step of embodiment of the method.
In addition, each functional unit in each embodiment of the invention can be integrated in a proxy module, can also
That unit is individually physically present, can also two or more units be integrated in a module.Above-mentioned integrated mould
Block can both be realized in the form of hardware, it would however also be possible to employ the form of software function module is realized.The integrated module is such as
Fruit is realized using in the form of software function module and as independent production marketing or in use, can also be stored in a computer
In read/write memory medium.
Storage medium mentioned above can be read-only storage, disk or CD etc..Although having been shown and retouching above
Embodiments of the invention are stated, it is to be understood that above-described embodiment is exemplary, it is impossible to be interpreted as the limit to the present invention
System, one of ordinary skill in the art can be changed to above-described embodiment, change, replace and become within the scope of the invention
Type.
Claims (8)
1. a kind of dead pixel points of images compensation method, it is characterised in that the imaging sensor being provided previously by includes：Photosensitive pixel array,
And the optical filter on the photosensitive pixel array is arranged on, wherein, the optical filter includes filter unit array, each to filter
Unit covers m*n photosensitive pixel and constitutes merging pixel, wherein m*n>1；It the described method comprises the following steps：
When the output for reading the photosensitive pixel array generates full size image, the of current detection is determined according to preset strategy
Whether one photosensitive pixel is bad point；
If it is determined that first photosensitive pixel is bad point, then first belonged to according to first photosensitive pixel merges in pixel just
The output for the output compensation bad point often put, wherein,
Work as m*n>When=4, the first merging pixel includes：First photosensitive pixel of current detection and multiple second light-sensitive images
Element；
Whether first photosensitive pixel that current detection is determined according to preset strategy is bad point, including：
According to the output of the multiple second photosensitive pixel, it is determined that the output Rmax-1 adjacent with maximum output Rmax；
Obtain output and Rmax-1 the second poor absolute value of first photosensitive pixel；
If second absolute value is more than or equal to default Second Threshold, it is determined that first photosensitive pixel is bad point；
First output for merging normal point in pixel belonged to according to first photosensitive pixel compensates the defeated of the bad point
Go out, including：
The output of first photosensitive pixel is replaced with into Rmax-1；
If second absolute value is less than the Second Threshold, it is determined that the output Rmin+1 adjacent with minimum output Rmin；
Obtain output and Rmin+1 the 3rd poor absolute value of first photosensitive pixel；
If the 3rd absolute value is more than or equal to default 3rd threshold value, it is determined that first photosensitive pixel is bad point；
First output for merging normal point in pixel belonged to according to first photosensitive pixel compensates the defeated of the bad point
Go out, including：
The output of first photosensitive pixel is replaced with into Rmin+1.
2. the method as described in claim 1, it is characterised in that also include：
Second average is obtained according to the output of the multiple second photosensitive pixel；
The Second Threshold is determined according to second average and default second coefficient, wherein, second coefficient be more than 0 and
Less than 1；
3rd threshold value is determined according to second average and default 3rd coefficient, wherein, the 3rd coefficient be more than 0 and
Less than 1.
3. a kind of dead pixel points of images compensation device, it is characterised in that including：Imaging sensor and image processor, wherein,
Described image sensor includes：Photosensitive pixel array, and the optical filter being arranged on the photosensitive pixel array, its
In, the optical filter includes filter unit array, and each filter unit covers m*n photosensitive pixel and constitutes merging pixel, its
Middle m*n>1；
Described image processor includes：
First detection module, for when the output for reading the photosensitive pixel array generates full size image, according to default plan
Whether the first photosensitive pixel for slightly determining current detection is bad point；
First compensating module, for if it is determined that first photosensitive pixel is bad point, then according to first photosensitive pixel ownership
First merge normal point in pixel the output compensation bad point output, wherein,
Work as m*n>When=4, the first merging pixel includes：First photosensitive pixel of current detection and multiple second light-sensitive images
Element；
The first detection module is used for：
According to the output of the multiple second photosensitive pixel, it is determined that the output Rmax-1 adjacent with maximum output Rmax；
Obtain output and Rmax-1 the second poor absolute value of first photosensitive pixel；
If second absolute value is more than or equal to default Second Threshold, it is determined that first photosensitive pixel is bad point；
First compensating module is used for：
The output of first photosensitive pixel is replaced with into Rmax-1；
The first detection module is additionally operable to：
If second absolute value is less than the Second Threshold, it is determined that the output Rmin+1 adjacent with minimum output Rmin；
Obtain output and Rmin+1 the 3rd poor absolute value of first photosensitive pixel；
If the 3rd absolute value is more than or equal to default 3rd threshold value, it is determined that first photosensitive pixel is bad point；
First compensating module is additionally operable to：
The output of first photosensitive pixel is replaced with into Rmin+1.
4. device as claimed in claim 3, it is characterised in that the first detection module is additionally operable to：
Second average is obtained according to the output of the multiple second photosensitive pixel；
The Second Threshold is determined according to second average and default second coefficient, wherein, second coefficient be more than 0 and
Less than 1；
3rd threshold value is determined according to second average and default 3rd coefficient, wherein, the 3rd coefficient be more than 0 and
Less than 1；
5. a kind of terminal device, it is characterised in that including：Dead pixel points of images compensation device as described in claim 3-4 is any.
6. equipment as claimed in claim 5, it is characterised in that the terminal device includes：
Mobile phone, IPAD or, Intelligent worn device.
7. equipment as claimed in claim 5, it is characterised in that also include：In being connected with described image compensating bad point device
Central processor and external memory, the central processing unit are used to control the external memory storage image.
8. equipment as claimed in claim 5, it is characterised in that also include：In being connected with described image compensating bad point device
Central processor and display device, the central processing unit are used to control the display device display image.
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| CN106210712B (en) * | 2016-08-11 | 2018-07-10 | 上海大学 | A kind of dead pixel points of images detection and processing method |
| CN106328010B (en) * | 2016-09-23 | 2019-01-04 | 歌尔科技有限公司 | Show equipment, electronic equipment, luminescence unit break treat with method and apparatus |
| CN107948392B (en) * | 2016-10-12 | 2021-02-19 | 中兴通讯股份有限公司 | Terminal and display fault processing method |
| CN106791477B (en) * | 2016-11-29 | 2019-07-19 | Oppo广东移动通信有限公司 | Image processing method, image processing apparatus, imaging device and manufacturing method |
| CN108231009B (en) * | 2017-11-03 | 2019-10-25 | 天津大学 | A kind of LED backlight bad point restorative procedure based on liquid crystal pixel compensation |
| CN110807731B (en) * | 2018-07-20 | 2023-06-30 | 宁波舜宇光电信息有限公司 | Method, device, system and storage medium for compensating image dead pixel |
| CN110035281B (en) * | 2019-04-29 | 2021-04-13 | 昆山丘钛微电子科技有限公司 | Dead pixel detection method and device and electronic equipment |
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