CN109686286A - Image-signal processing method and device, OLED display - Google Patents
Image-signal processing method and device, OLED display Download PDFInfo
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- 238000007476 Maximum Likelihood Methods 0.000 claims description 13
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- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
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- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
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- G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
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Abstract
The invention discloses a kind of image-signal processing methods comprising: 3 frames of delay or more are carried out to the multiple image signal sequentially input and are exported;Detection image signal whether there is failure frame;If so, being repaired to the failure frame, comprising: if detecting, nth frame picture signal is failure frame, calculates the pixel value difference of N-1 frame and N+1 frame image signal;Reparation frame image signal is calculated according to N-1 frame and N+1 frame image signal and the pixel value difference;The reparation frame image signal is replaced into the nth frame picture signal output;Wherein, N-1, N and N+1 are positive integer.The invention also discloses a kind of image signal processing apparatus and include the OLED display of the device, described image signal processing apparatus includes data reception module, data storage, data outputting module, fault detection module, data comparison module and data repair module, and described image signal processing apparatus is arranged to carry out image-signal processing method as described above.
Description
Technical Field
The invention relates to the technical field of displays, in particular to an image signal processing method and device, and an OLED display comprising the image signal processing method and device.
Background
Organic light-emitting diode (OLED) display panels have the advantages of self-luminescence, thin thickness, wide viewing angle, fast response speed, etc., and are representative of a new generation of flat panel display technologies, and are increasingly popular in the industry.
With the progress of display technology, the requirements of users for picture display are higher and higher, and digital video also tends to be the mainstream of video signals, but the transmission of full fidelity pictures cannot be carried out inevitably under the existing signal transmission technology. When a video signal is sampled and converted from a digital signal to an analog signal, a part of the signal is lost, and more seriously, the video signal is influenced by space noise when the video signal is transmitted over a long distance through the analog signal, so that the signal is damaged, and when sampling analysis and digital-to-analog conversion are carried out after the video analog signal is received, the video signal is influenced to a certain extent by static electricity, and finally, a picture seen by a client is seriously lost.
How to reduce the damaged image signal to the image displayed on the screen is a problem to be solved in the industry.
Disclosure of Invention
In view of the shortcomings of the prior art, the present invention provides an image signal processing method and apparatus to reduce the influence of the image signal of the failed frame on the screen display.
In order to achieve the purpose, the invention adopts the following technical scheme:
an image signal processing method, comprising:
delaying the sequentially input multi-frame image signals by more than 3 frames for output;
detecting whether the image signal has a fault frame; if so, repairing the fault frame, including:
if the image signal of the Nth frame is detected to be a fault frame, calculating a pixel difference value of the image signal of the (N-1) th frame and the image signal of the (N + 1) th frame;
calculating a repair frame image signal according to the image signals of the (N-1) th frame and the (N + 1) th frame and the pixel difference value;
replacing the N frame image signal with the repair frame image signal and outputting the repair frame image signal;
wherein N-1, N and N +1 are positive integers.
In an optimal scheme, the repairing the fault frame specifically includes:
capturing a maximum similar sub-matrix of the image signals of the (N-1) th frame and the (N + 1) th frame according to the image data matrix of the image signals of the (N-1) th frame and the (N + 1) th frame, and calculating a row offset delta x and a column offset delta y of the position of the maximum similar sub-matrix in the image data matrix of the (N + 1) th frame relative to the position in the image data matrix of the (N-1) th frame to form the pixel difference;
such that the position of the maximum likelihood sub-matrix is offset by a row from its position in the matrix of image data of frame N-1And column offset ofAs a reference, shifting all elements in the image data matrix of the (N + 1) th frame as a whole, and complementing the elements of the vacant positions by using the elements of the corresponding positions in the image data matrix of the (N-1) th frame to form an image data matrix of a repair frame, so as to obtain an image signal of the repair frame; or, so that the position of the maximum likelihood sub-matrix is offset by a row from its position in the image data matrix of the (N-1) th frameAnd column offset ofShifting the image data matrix of the N-1 th frame as a referenceAnd elements at the vacant positions are complemented by elements at corresponding positions in the image data matrix of the (N + 1) th frame to form an image data matrix of a repair frame, and an image signal of the repair frame is obtained;
wherein, ifAndif not, rounding the integer.
Specifically, if the pixel difference exceeds a display limit, the N +1 th frame image signal is used as the repair frame image signal; (ii) a Wherein, the pixel difference value exceeding the display limit means that the maximum similar submatrix does not exist in the image signals of the (N-1) th frame and the (N + 1) th frame.
Specifically, the number of elements in the maximum similarity submatrix is 20% or more of the total number of elements of the image data matrix.
The invention also provides an image signal processing device, which comprises a data receiving module, a data memory, a data output module, a fault detection module, a data comparison module and a data restoration module; wherein,
the data receiving module is used for receiving multi-frame image signals which are sequentially input from the outside;
the data storage is connected to the data receiving module to store image signals, and is configured to store continuous image signals with more than 3 frames;
the data output module is connected to the data storage and controls to output image signals according to a data enable signal, and the data enable signal is configured to delay each frame of image signals output by the data output module by more than 3 frames compared with each frame of image signals received by the data receiving module;
the fault detection module is connected to the data receiving module to detect whether a fault frame image signal exists; when detecting that the image signal of the Nth frame is a fault frame, the fault detection module generates a fault enabling signal and sends the fault enabling signal to the data restoration module and the data output module;
the data comparison module is connected to the fault detection module and used for calculating pixel difference values of image signals of an (N-1) th frame and an (N + 1) th frame and sending the pixel difference values to the data restoration module;
the data restoration module is connected to the data memory and the data comparison module, and when receiving the fault enabling signal, the data restoration module acquires image signals of an (N-1) th frame and an (N + 1) th frame from the data memory and calculates restoration frame image signals according to the image signals of the (N-1) th frame and the (N + 1) th frame and the pixel difference value;
the data output module is also connected to the data restoration module, and when receiving the fault enabling signal, the data output module acquires the restoration frame image signal from the data restoration module to replace the Nth frame image signal for output;
wherein N-1, N and N +1 are positive integers.
In a preferred embodiment, the calculating the pixel difference of the image signals of the (N-1) th frame and the (N + 1) th frame in the data comparison module includes: capturing a maximum similar sub-matrix of the image signals of the (N-1) th frame and the (N + 1) th frame according to the image data matrix of the image signals of the (N-1) th frame and the (N + 1) th frame, and calculating a row offset delta x and a column offset delta y of the position of the maximum similar sub-matrix in the image data matrix of the (N + 1) th frame relative to the position in the image data matrix of the (N-1) th frame to form the pixel difference;
in the data restoration module, calculating and acquiring a restoration frame image signal includes: such that the position of the maximum likelihood sub-matrix is offset by a row from its position in the matrix of image data of frame N-1And column offset ofAs a reference, shifting all elements in the image data matrix of the (N + 1) th frame as a whole, and complementing the elements of the vacant positions by using the elements of the corresponding positions in the image data matrix of the (N-1) th frame to form an image data matrix of a repair frame, so as to obtain an image signal of the repair frame; or, so that the position of the maximum likelihood sub-matrix is offset by a row from its position in the image data matrix of the (N-1) th frameAnd column offset ofAs a reference, shifting all elements in the image data matrix of the (N-1) th frame integrally, and complementing the elements of the vacant positions by using the elements of the corresponding positions in the image data matrix of the (N + 1) th frame to form an image data matrix of a repair frame, and obtaining the image signal of the repair frame; wherein, ifAndif not, rounding the integer.
Specifically, in the data recovery module, if the pixel difference exceeds a display limit, the N +1 th frame image signal is used as the recovery frame image signal; wherein, the pixel difference value exceeding the display limit means that the maximum similar submatrix does not exist in the image signals of the (N-1) th frame and the (N + 1) th frame.
Specifically, the number of elements in the maximum similarity submatrix is 20% or more of the total number of elements of the image data matrix.
When detecting that the image signal of the nth frame is a fault frame, the fault detection module further sends the fault enable signal to the data memory, and the data memory allows the data restoration module to read the fault enable signal when receiving the fault enable signal so as to acquire the image signals of the (N-1) th frame and the (N + 1) th frame.
Another aspect of the present invention is to provide an OLED display, including a display panel and a driving unit, the driving unit providing a driving signal to the display panel to make the display panel display an image, wherein the driving unit is provided therein with the image signal processing device as described above, and the driving signal includes an image signal.
According to the image signal processing method and device provided by the embodiment of the invention, firstly, a plurality of frames of image signals which are sequentially input are output in a delayed mode for more than 3 frames, then when a fault frame image signal is detected, a repair frame image signal is obtained through calculation according to the front and rear two frames of image signals of the fault frame image signal and the pixel difference value of the two frames of image signals, and the repair frame image signal obtained through calculation replaces the fault frame image signal to be output and driven to display. The repair frame image signal is obtained by calculation according to the front frame image signal and the rear frame image signal of the fault frame image signal, and has larger similarity with the front frame image signal and the rear frame image signal, so that a user cannot perceive picture defects when driving picture display, and the influence of the image signal of the fault frame on the picture display is reduced.
Drawings
Fig. 1 is a flowchart of an image signal processing method in an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of an image signal processing apparatus according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of an OLED display in an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention are described in detail below with reference to the accompanying drawings. Examples of these preferred embodiments are illustrated in the accompanying drawings. The embodiments of the invention shown in the drawings and described in accordance with the drawings are exemplary only, and the invention is not limited to these embodiments.
It should be noted that, in order to avoid obscuring the present invention with unnecessary details, only the structures and/or processing steps closely related to the scheme according to the present invention are shown in the drawings, and other details not so relevant to the present invention are omitted.
The present embodiment first provides an image signal processing method, as shown in fig. 1, the image signal processing method includes:
(a) image signal input: successive multi-frame image signals are sequentially input.
(b) And image signal delay processing: the input image signal is subjected to delay processing, so that the image signal can be output in a delay time of more than 3 frames compared with the input.
(c) Outputting an image signal: and outputting the image signal subjected to the time delay processing.
(d) And detecting whether the image signal has a fault frame: detecting whether a fault frame exists in a corresponding image signal while carrying out delay processing on an input image signal; if no fault frame exists, outputting the image signal after the time delay processing in the step (c); if the presence of the failure frame is detected, the following step (e) is performed.
(e) And image signal restoration: and (c) repairing the fault frame image signal to obtain a repair frame image signal, and outputting the repair frame image signal instead of the detected fault frame image signal in the step (c).
Wherein, repairing the fault frame image signal in the step (e) specifically comprises:
(1) and if the image signal of the Nth frame is detected to be a fault frame, calculating the pixel difference value of the image signal of the (N-1) th frame and the image signal of the (N + 1) th frame, wherein the N-1, the N and the N +1 are positive integers. Specifically, the pixel difference value is formed by grabbing the maximum similar sub-matrix of the image signals of the (N-1) th frame and the (N + 1) th frame according to the image data matrix of the image signals of the (N-1) th frame and the (N + 1) th frame, calculating the row offset delta x and the column offset delta y of the position of the maximum similar sub-matrix in the image data matrix of the (N + 1) th frame relative to the position in the image data matrix of the (N-1) th frame. For example, the maximum likelihood submatrix starts at row x1 and column y1 in the image data matrix of the N-1 th frame; the initial row of the maximum similarity sub-matrix in the image data matrix of the (N + 1) th frame is x2, and the initial column is y 2; then Δ x-x 2-x1 and Δ y-y 2-y 1.
And if not, judging that the maximum similar submatrix does not exist in the image signals of the (N-1) th frame and the (N + 1) th frame. More preferably, the number of elements in the maximum similarity submatrix is set to be 40% or more of the total number of elements of the image data matrix. It should be noted that, the larger the proportion of the number of elements in the maximum similarity sub-matrix is, the better, and the threshold value of the proportion can be adjusted according to the resolution of the display.
(2) And calculating a repair frame image signal according to the image signals of the (N-1) th frame and the (N + 1) th frame and the pixel difference value, and then replacing the image signal of the N frame with the repair frame image signal to output. Specifically, after the row shift amount Δ x and the column shift amount Δ y of the maximum similarity submatrix are calculated, the repair frame image signal is calculated and acquired in the following manner (i) or manner (ii):
manner (I) such that the row offset of the position of the maximum likelihood sub-matrix with respect to its position in the image data matrix of frame N-1 isAnd column offset ofAnd as a reference, wholly shifting all elements in the image data matrix of the (N + 1) th frame, complementing the elements of the vacant positions by using the elements of the corresponding positions in the image data matrix of the (N-1) th frame to form an image data matrix of a repair frame, and obtaining the image signal of the repair frame. For example, all elements in the image data matrix of the N +1 th frame are collectively shifted so that the starting row x2 and the starting column y2 of the maximum likelihood sub-matrix change toAndin the process of shifting, some element positions in the image data matrix are vacant (for example, the positions of matrix elements are wholly moved to the left, part of elements on the left side of the matrix are moved out of the matrix, and part of element positions on the right side of the matrix are vacant), at this time, the elements in the vacant positions are complemented by the elements in the corresponding positions in the image data matrix of the frame N-1, an image data matrix of a repair frame is formed, and the image signal of the repair frame is obtained.
Means (II) for shifting the position of the maximum likelihood sub-matrix by the row offset from its position in the image data matrix of the (N-1) th frameAnd column offset ofAnd as a reference, wholly shifting all elements in the image data matrix of the (N-1) th frame, complementing the elements of the vacant positions by using the elements of the corresponding positions in the image data matrix of the (N + 1) th frame to form an image data matrix of a repair frame, and obtaining the image signal of the repair frame. For example, all elements in the image data matrix of the N-1 th frame are collectively shifted so as to be maximumThe starting row x1 and starting column y1 of the similar submatrix respectively change toAndin the process of shifting, positions of some elements in the image data matrix are vacant (for example, the positions of the matrix elements are wholly moved to the right, part of the elements on the right side of the matrix are moved out of the matrix, and the positions of part of the elements on the left side of the matrix are vacant), and at this time, the elements in the vacant positions are complemented by the elements in the corresponding positions in the image data matrix of the (N + 1) th frame to form an image data matrix of a repair frame, and the image signal of the repair frame is obtained.
Wherein, ifAndif not, rounding the integer. For example, ifAnd if the calculated value is 20.5, rounding the calculated value to 20 or 21.
In the step (e), if the pixel difference exceeds the display limit, using the N +1 th frame image signal as the repair frame image signal; wherein, the pixel difference value exceeding the display limit means that the maximum similar submatrix does not exist in the image signals of the (N-1) th frame and the (N + 1) th frame.
The present embodiment also provides an image signal processing apparatus for executing the image signal processing method of the present embodiment as described above. As shown in fig. 2, the image signal processing apparatus 101 includes a data receiving module 10, a data storage 20, a data output module 30, a failure detection module 40, a data comparison module 50, and a data repair module 60.
The data receiving module 10 IS configured to receive a plurality of frames of image signals IS sequentially input from the outside.
Wherein the data memory 20 IS connected to the data receiving module 10, the data memory 20 IS used for storing the image signal IS input from the data receiving module 10, and the data memory 20 IS configured to be capable of storing continuous image signals of more than 3 frames, such as storing the image signals of the (N-1) th, the (N) th and the (N + 1) th frames. Wherein N-1, N and N +1 are positive integers.
Wherein the data output module 30 IS connected to the data storage 20 and controls the output of the image signal OS according to a data enable signal EN, and the data enable signal EN IS configured to delay the output of each frame of image signal OS output by the data output module 30 by more than 3 frames compared with each frame of image signal IS received by the data receiving module 10.
Wherein the failure detection module 40 is connected to the data receiving module 10 to detect whether the received image signal has a failure frame image signal: when detecting that there is a fault frame image signal, for example, when detecting that the nth frame image signal is a fault frame, the fault detection module 40 generates a fault enable signal EI and sends the fault enable signal EI to the data repair module 60 and the data output module 30; and if the fault frame image signal is not detected, not sending the fault enabling signal EI.
The data comparison module 50 is connected to the fault detection module 40, and the data comparison module 50 obtains two frames of image signals before and after the fault frame image signal from the fault detection module 40, that is, the N-1 th frame and the N +1 th frame of image signal, calculates a pixel difference AS between the N-1 th frame and the N +1 th frame of image signal, and sends the pixel difference AS to the data restoration module 60.
Wherein the data repair module 60 is connected to the data storage 20 and the data comparison module 50, and the data repair module 60 acquires the image signals of the (N-1) th frame and the (N + 1) th frame from the data storage 20 when receiving the fault enable signal EI, and calculates the repair frame image signal CS according to the image signals of the (N-1) th frame and the (N + 1) th frame and the pixel difference AS provided by the data comparison module 50.
Wherein the data output module 30 is further connected to the data repair module 60, and the data output module 30 acquires the repair frame image signal CS from the data repair module 60 to replace the nth frame image signal (the failure frame image signal) for output when receiving the failure enable signal EI.
In the data comparison module 50, calculating the pixel difference AS between the image signals of the (N-1) th frame and the (N + 1) th frame includes: and capturing the maximum similar sub-matrix of the image signals of the (N-1) th frame and the (N + 1) th frame according to the image data matrix of the image signals of the (N-1) th frame and the (N + 1) th frame, and calculating the row offset delta x and the column offset delta y of the position of the maximum similar sub-matrix in the image data matrix of the (N + 1) th frame relative to the position in the image data matrix of the (N-1) th frame to form the pixel difference value AS.
The data restoration module 60 obtains the restoration frame image signal by calculation according to the following mode (i) or mode (ii):
manner (I) such that the row offset of the position of the maximum likelihood sub-matrix with respect to its position in the image data matrix of frame N-1 isAnd column offset ofAnd as a reference, wholly shifting all elements in the image data matrix of the (N + 1) th frame, complementing the elements of the vacant positions by using the elements of the corresponding positions in the image data matrix of the (N-1) th frame to form an image data matrix of a repair frame, and obtaining the image signal of the repair frame.
Mode (II) such that the position of the maximum likelihood sub-matrix is relative to its position in the image data matrix of frame N-1The line offset isAnd column offset ofAnd as a reference, wholly shifting all elements in the image data matrix of the (N-1) th frame, complementing the elements of the vacant positions by using the elements of the corresponding positions in the image data matrix of the (N + 1) th frame to form an image data matrix of a repair frame, and obtaining the image signal of the repair frame.
Wherein, ifAndif not, rounding the integer. For example, ifAnd if the calculated value is 20.5, rounding the calculated value to 20 or 21.
In the data repairing module 60, if the pixel difference AS exceeds a display limit, the N +1 th frame image signal is used AS the repairing frame image signal; wherein, the pixel difference value exceeding the display limit means that the maximum similar submatrix does not exist in the image signals of the (N-1) th frame and the (N + 1) th frame.
In the present embodiment, as shown in fig. 2, when detecting that the image signal of the nth frame is a failure frame, the failure detection module 40 further sends the failure enable signal EI to the data memory 20, and the data memory 20 allows the data repair module 60 to read to acquire the image signals of the (N-1) th frame and the (N + 1) th frame when receiving the failure enable signal EI.
The image signal processing method and device provided by the above embodiment first delay a plurality of frames of image signals input in sequence for more than 3 frames to output, then when a fault frame image signal is detected, calculate and obtain a repair frame image signal according to two frames of image signals before and after the fault frame image signal and a pixel difference value between the two frames of image signals, and output and drive display by replacing the fault frame image signal with the repair frame image signal obtained by calculation. The repair frame image signal is obtained by calculation according to the front frame image signal and the rear frame image signal of the fault frame image signal, and has larger similarity with the front frame image signal and the rear frame image signal, so that a user cannot perceive picture defects when driving picture display, and the influence of the image signal of the fault frame on the picture display is reduced.
Another aspect of the present embodiment is to provide an OLED display, as shown in fig. 3, including a display panel 200 and a driving unit 100, wherein the driving unit 100 provides a driving signal to the display panel 200 to make the display panel 200 display an image. Wherein, the driving unit 100 is provided with the image signal processing device 101 as described above, and the driving signal provided by the driving unit 100 to the display panel 200 includes an image signal. By adopting the image signal processing device and the corresponding image signal processing method provided by the embodiment of the invention, the OLED display can reduce the influence of the image signal of the failed frame on the image display.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The foregoing is directed to embodiments of the present application and it is noted that numerous modifications and adaptations may be made by those skilled in the art without departing from the principles of the present application and are intended to be within the scope of the present application.
Claims (10)
1. An image signal processing method characterized by comprising:
delaying the sequentially input multi-frame image signals by more than 3 frames for output;
detecting whether the image signal has a fault frame; if so, repairing the fault frame, including:
if the image signal of the Nth frame is detected to be a fault frame, calculating a pixel difference value of the image signal of the (N-1) th frame and the image signal of the (N + 1) th frame;
calculating a repair frame image signal according to the image signals of the (N-1) th frame and the (N + 1) th frame and the pixel difference value;
replacing the N frame image signal with the repair frame image signal and outputting the repair frame image signal;
wherein N-1, N and N +1 are positive integers.
2. The image signal processing method according to claim 1, wherein the repairing the failed frame specifically comprises:
capturing a maximum similar sub-matrix of the image signals of the (N-1) th frame and the (N + 1) th frame according to the image data matrix of the image signals of the (N-1) th frame and the (N + 1) th frame, and calculating a row offset delta x and a column offset delta y of the position of the maximum similar sub-matrix in the image data matrix of the (N + 1) th frame relative to the position in the image data matrix of the (N-1) th frame to form the pixel difference;
such that the position of the maximum likelihood sub-matrix is offset by a row from its position in the matrix of image data of frame N-1And column offset ofAs a reference, shifting all elements in the image data matrix of the (N + 1) th frame as a whole, and complementing the elements of the vacant positions by using the elements of the corresponding positions in the image data matrix of the (N-1) th frame to form an image data matrix of a repair frame, so as to obtain an image signal of the repair frame;
or, so that the position of the maximum likelihood sub-matrix is offset by a row from its position in the image data matrix of the (N-1) th frameAnd column offset ofFor reference, all elements in the image data matrix of the N-1 th frame are shifted as a whole, andcomplementing elements of the vacant positions by using elements of corresponding positions in the image data matrix of the (N + 1) th frame to form an image data matrix of a repair frame and obtain an image signal of the repair frame;
wherein, ifAndif not, rounding the integer.
3. The image signal processing method according to claim 2, wherein if the pixel difference value exceeds a display limit, the N +1 frame image signal is used as the repair frame image signal; wherein, the pixel difference value exceeding the display limit means that the maximum similar submatrix does not exist in the image signals of the (N-1) th frame and the (N + 1) th frame.
4. The image signal processing method according to claim 2 or 3, wherein the number of elements in the maximum similarity submatrix is more than 20% of the total number of elements of the image data matrix.
5. An image signal processing device is characterized by comprising a data receiving module, a data memory, a data output module, a fault detection module, a data comparison module and a data restoration module; wherein,
the data receiving module is used for receiving multi-frame image signals which are sequentially input from the outside;
the data storage is connected to the data receiving module to store image signals, and is configured to store continuous image signals with more than 3 frames;
the data output module is connected to the data storage and controls to output image signals according to a data enable signal, and the data enable signal is configured to delay each frame of image signals output by the data output module by more than 3 frames compared with each frame of image signals received by the data receiving module;
the fault detection module is connected to the data receiving module to detect whether a fault frame image signal exists; when detecting that the image signal of the Nth frame is a fault frame, the fault detection module generates a fault enabling signal and sends the fault enabling signal to the data restoration module and the data output module;
the data comparison module is connected to the fault detection module and used for calculating pixel difference values of image signals of an (N-1) th frame and an (N + 1) th frame and sending the pixel difference values to the data restoration module;
the data restoration module is connected to the data memory and the data comparison module, and when receiving the fault enabling signal, the data restoration module acquires image signals of an (N-1) th frame and an (N + 1) th frame from the data memory and calculates restoration frame image signals according to the image signals of the (N-1) th frame and the (N + 1) th frame and the pixel difference value;
the data output module is also connected to the data restoration module, and when receiving the fault enabling signal, the data output module acquires the restoration frame image signal from the data restoration module to replace the Nth frame image signal for output;
wherein N-1, N and N +1 are positive integers.
6. The image signal processing apparatus of claim 5, wherein the data comparison module calculates the pixel difference of the image signals of the (N-1) th frame and the (N + 1) th frame comprises:
capturing a maximum similar sub-matrix of the image signals of the (N-1) th frame and the (N + 1) th frame according to the image data matrix of the image signals of the (N-1) th frame and the (N + 1) th frame, and calculating a row offset delta x and a column offset delta y of the position of the maximum similar sub-matrix in the image data matrix of the (N + 1) th frame relative to the position in the image data matrix of the (N-1) th frame to form the pixel difference;
in the data restoration module, calculating and acquiring a restoration frame image signal includes:
so thatThe row offset of the position of the maximum similar submatrix relative to the position of the maximum similar submatrix in the image data matrix of the N-1 th frame is obtainedAnd column offset ofAs a reference, shifting all elements in the image data matrix of the (N + 1) th frame as a whole, and complementing the elements of the vacant positions by using the elements of the corresponding positions in the image data matrix of the (N-1) th frame to form an image data matrix of a repair frame, so as to obtain an image signal of the repair frame;
or, so that the position of the maximum likelihood sub-matrix is offset by a row from its position in the image data matrix of the (N-1) th frameAnd column offset ofAs a reference, shifting all elements in the image data matrix of the (N-1) th frame integrally, and complementing the elements of the vacant positions by using the elements of the corresponding positions in the image data matrix of the (N + 1) th frame to form an image data matrix of a repair frame, and obtaining the image signal of the repair frame;
wherein, ifAndif not, rounding the integer.
7. The image signal processing apparatus according to claim 6, wherein in the data recovery module, if the pixel difference exceeds a display limit, the N +1 th frame image signal is used as the recovery frame image signal; wherein, the pixel difference value exceeding the display limit means that the maximum similar submatrix does not exist in the image signals of the (N-1) th frame and the (N + 1) th frame.
8. The image signal processing apparatus according to claim 6 or 7, wherein the number of elements in the maximum similarity submatrix is more than 20% of the total number of elements of the image data matrix.
9. The image signal processing apparatus according to claim 5, wherein the failure detection module further transmits the failure enable signal to the data memory when detecting that the image signal of the nth frame is a failure frame, the data memory allowing the data restoration module to read to acquire the image signals of the N-1 th frame and the N +1 th frame when receiving the failure enable signal.
10. An OLED display comprising a display panel and a driving unit for providing a driving signal to the display panel to make the display panel display an image, wherein the driving unit is provided with an image signal processing apparatus according to any one of claims 5 to 9, and the driving signal comprises an image signal.
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