CN116403536A - Method for improving definition of electrophoresis display picture - Google Patents
Method for improving definition of electrophoresis display picture Download PDFInfo
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- CN116403536A CN116403536A CN202310293849.1A CN202310293849A CN116403536A CN 116403536 A CN116403536 A CN 116403536A CN 202310293849 A CN202310293849 A CN 202310293849A CN 116403536 A CN116403536 A CN 116403536A
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- 238000000034 method Methods 0.000 title claims abstract description 32
- 238000001962 electrophoresis Methods 0.000 title claims abstract description 7
- 239000011159 matrix material Substances 0.000 claims abstract description 60
- 238000003384 imaging method Methods 0.000 claims abstract description 4
- 230000008569 process Effects 0.000 claims description 6
- 230000009467 reduction Effects 0.000 claims description 3
- 238000011426 transformation method Methods 0.000 description 3
- 230000007423 decrease Effects 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- 241001584785 Anavitrinella pampinaria Species 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- 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
- G09G3/34—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 by control of light from an independent source
- G09G3/3433—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 by control of light from an independent source using light modulating elements actuated by an electric field and being other than liquid crystal devices and electrochromic devices
- G09G3/344—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 by control of light from an independent source using light modulating elements actuated by an electric field and being other than liquid crystal devices and electrochromic devices based on particles moving in a fluid or in a gas, e.g. electrophoretic devices
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/02—Improving the quality of display appearance
- G09G2320/0271—Adjustment of the gradation levels within the range of the gradation scale, e.g. by redistribution or clipping
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D10/00—Energy efficient computing, e.g. low power processors, power management or thermal management
Abstract
The invention relates to a method for improving the definition of an electrophoresis display picture, which comprises the following steps: determining the gray value of each pixel in the display picture, acquiring a gray value matrix A determined by the display picture, and setting a threshold value according to the gray value distribution rule of all pixels in the display picture; formulating a processing sequence for elements in the gray value matrix A; first element a from gray value matrix A 11 Firstly, sequentially processing each element in the gray value matrix A according to a processing sequence to obtain a gray value matrix B; replacing all elements in a first row, a first column, an nth row and an mth column in the gray value matrix B with 0 to form a gray value matrix C, and then carrying out imaging processing on the gray value inverse matrix C and outputting; according to the technical scheme, the pixels with gray values near the threshold value are considered, and the picture definition is improved.
Description
Technical Field
The invention relates to the field of electrophoretic display, in particular to a method for improving the definition of an electrophoretic display picture.
Background
In the process of using electronic paper, the phenomenon of blurring of image display is easy to occur, and in order to improve the display definition, an image is usually processed by adopting a gray level conversion method. The gray scale transformation refers to a method of changing the gray scale value of each pixel in the source image point by point according to a certain transformation relationship according to a certain target condition. Common gray scale transformation methods are a thresholding method, a linear transformation method, and a nonlinear transformation method.
In the electrophoretic display process, a thresholding method is typically used to process the image, so that the image sharpness is improved. This method is typically to set a threshold in the digital image, which is converted to zero for pixels in the digital image having a gray value less than the threshold, and to 255 for pixels having a gray value greater than or equal to the threshold.
However, this method is too rough for the pixels whose gray values are near the threshold, especially for those pixels whose gray values have a small difference from the threshold, and lacks special consideration, and thus easily causes distortion in the image quality.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a method for improving the definition of an electrophoresis display picture.
The invention provides a method for improving the definition of an electrophoresis display picture, which has the following technical scheme that:
a method for improving the definition of an electrophoretic display, comprising the steps of:
step one, determining the gray value of each pixel in a display picture, obtaining a gray value matrix A determined by the display picture, and setting a threshold value according to the gray value distribution rule of all the pixels in the display picture,
a ij representing the corresponding gray values of the ith row and the jth column of the display area in the display picture, wherein i is more than or equal to 1 and less than or equal to n, and j is more than or equal to 1 and less than or equal to m;
step two, formulating a processing sequence for elements in the gray value matrix A;
step three, first element a from gray value matrix A 11 Initially, each element in the gray value matrix a is sequentially processed according to the processing sequence, and the processing rule is as follows:
if the element a in the gray value matrix A ij Less than the threshold, the element a is then ij Replacing with 0, and substituting element a in the gray value matrix A i+k j+l The value does not exceed the value a by an increment ij Then processing the next element in the gray value matrix a in the processing order;
if the element a in the gray value matrix A ij Is not smallAt the threshold value, the element is then
a ij Replaced with 255 and the element a in the gray value matrix A is replaced by i+k j+1 The value is reduced in a manner that the reduction does not exceed the value delta, wherein,
Δ＝255-a ij
subsequently processing the next element in the gray value matrix a in the processing order;
wherein 1.ltoreq.i.ltoreq.n, 1.ltoreq.j.ltoreq.m, i+k.ltoreq.n, j+l.ltoreq.m, and (k, l) ∈ { (0, 1), (1, 0), (1, 1) }
Replacing all elements in the gray value matrix A according to the processing rule to form a gray value matrix B;
step four, replacing all elements in a first row, a first column, a last row and a last column in the gray value matrix B with 0 to form a gray value matrix C;
and fifthly, imaging the gray value matrix C and outputting the processed gray value matrix C as a display picture.
By adopting the technical scheme, compared with the prior art, the technical scheme provided by the invention has the following beneficial effects: the threshold is set according to the gray value distribution rule of all pixels in the display picture, and each element in the pixel value matrix A is replaced according to the processing rule, so that the pixels with small difference between the gray value and the threshold are well considered while the threshold is scientifically defined, the pixels are not arbitrarily binarized, and the picture display definition is effectively ensured by the processing of replacing the frame elements in the pixel value matrix B with 0.
Preferably, in the first step, the process of setting the threshold according to the gray value distribution rule of all the pixels in the display screen includes the following steps:
step 1.1, acquiring the median of the gray value of the display picture according to the gray value distribution information of the display picture;
step 1.2, setting the median as a threshold value;
the method considers the distribution rule of the pixels of the display picture when determining the threshold value, and scientifically and reasonably distinguishes dark spots and bright spots in the display picture by searching the median of the gray value and setting the median as the threshold value.
Preferably, the processing sequence comprises a first sequence τ 1 Or a second order tau 2 The first order tau 1 The method comprises the following steps:
a 11 →a 12 →…→a 1m →a 21 →…→a 2m →…→a nm
the second order tau 2 The method comprises the following steps:
a 11 →a 21 →…→a n1 →a 12 →…→a n2 →…→a nm ；
this ensures an orderly operation of the algorithm program and reduces the operational complexity.
Drawings
FIG. 1 is a flow chart of a method for improving the definition of an electrophoretic display screen according to the present invention;
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.
Example 1
The method for improving the definition of the electrophoresis display picture provided by the embodiment of the invention comprises the following steps:
step one, obtaining gray values of a display area in a display picture through digital processing, forming a gray value matrix A corresponding to the display picture, and setting a threshold value according to gray value distribution rules of all pixels in the display picture, wherein,
a ij representing the corresponding gray values of the ith row and the jth column of the display area in the display picture, wherein i is more than or equal to 1 and less than or equal to n, and j is more than or equal to 1 and less than or equal to m.
In this embodiment, the step one, namely, the process of setting the threshold according to the gray value distribution rule of all pixels in the display screen, includes the following steps:
step 1.1, obtaining the median of the gray value of the display picture according to the gray value distribution information of the display picture;
and step 1.2, setting the median as a threshold value.
And step two, formulating a processing sequence for the elements in the gray value matrix A.
Processing sequence τ in the present embodiment 1 The method comprises the following steps:
a 11 →a 12 →…→a 1m →a 21 →…→a 2m →…→a nm
step three, first element a from gray value matrix A 11 Initially, in a processing sequence τ 1 Each element in the gray value matrix a is processed in turn in a prescribed order, with the following processing rules:
when element a in gray value matrix A ij When the value is smaller than the threshold value, the element a is added ij Replace with 0 and replace element a in gray value matrix A i+k j+l The value does not exceed the value a by an increment ij After the processing is finished, processing the next element in the gray value matrix A according to the processing sequence;
when element a in gray value matrix A ij When not less than the threshold value, element a is ij Replaced with 255 and the element a in the gray value matrix A i+k j+l The value is reduced in a manner that the reduction does not exceed the value delta, wherein,
Δ＝255-a ij
after the processing is finished, processing the next element in the gray value matrix A according to the processing sequence;
wherein i is not less than 1 and not more than n, j is not less than 1 and not more than m, i+k is not less than n, j+l is not less than m,
(k，l)∈{(0，1)，(1，0)，(1，1)}
replacing all elements in the gray value matrix A according to the processing rule to form a gray value matrix B;
step four, replacing all elements in a first row, a first column, an nth row and an mth column in the gray value matrix B with 0 to form a gray value matrix C;
and fifthly, imaging the gray value matrix C and outputting the processed gray value matrix C as a display picture.
Example two
The processing order in this embodiment adopts the order τ 2 In which the order τ 2 The method comprises the following steps:
a 11 →a 21 →…→a n1 →a 12 →…→a n2 →…→a nm 。
the remainder is the same as in the first embodiment.
Whether embodiment one or embodiment two, wherein the element a in the gray value matrix a is i+kj+l The number of increases or decreases may be formulated according to energy distribution or delivery rules, provided that the respective requirements are met. For the case where i+k > n or j+l > m, an increase or decrease amount cannot be allocated since there is no corresponding element of the pixel value matrix a.
In general, although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (3)
1. A method for improving the definition of an electrophoresis display picture is characterized by comprising the following steps: the method comprises the following steps:
step one, determining the gray value of each pixel in a display picture, obtaining a gray value matrix A determined by the display picture, and setting a threshold value according to the gray value distribution rule of all the pixels in the display picture,
a ij representing the corresponding gray values of the ith row and the jth column of the display area in the display picture, wherein i is more than or equal to 1 and less than or equal to n, and j is more than or equal to 1 and less than or equal to m;
step two, formulating a processing sequence for elements in the gray value matrix A;
step three, first element a from gray value matrix A 11 Initially, each element in the gray value matrix a is sequentially processed according to the processing sequence, and the processing rule is as follows:
if the element a in the gray value matrix A ij Less than the threshold, the element a is then ij Replacing with 0, and substituting element a in the gray value matrix A i+k j+1 The value does not exceed the value a by an increment ij Then processing the next element in the gray value matrix a in the processing order;
if the element a in the gray value matrix A ij Not less than the threshold, then the element a ij Replaced with 255 and the element a in the gray value matrix A is replaced by i+k j+l The value is reduced in a manner that the reduction does not exceed the value delta, wherein,
Δ＝255-a ij subsequently processing the next element in the gray value matrix a in the processing order;
wherein i is not less than 1 and not more than n, j is not less than 1 and not more than m, i+k is not less than n, j+l is not less than m,
(k, l) e { (0, 1), (1, 0), (1, 1) } replacing all elements in the gray value matrix a according to the processing rule to form a gray value matrix B;
step four, replacing all elements in a first row, a first column, a last row and a last column in the gray value matrix B with 0 to form a gray value matrix C;
and fifthly, imaging the gray value matrix C and outputting the processed gray value matrix C as a display picture.
2. The method for improving definition of an electrophoretic display according to claim 1, wherein: in the first step, the process of setting the threshold according to the gray value distribution rule of all the pixels in the display screen includes the following steps:
step 1.1, acquiring the median of the gray value of the display picture according to the gray value distribution information of the display picture;
and step 1.2, setting the median as a threshold value.
3. The method for improving definition of an electrophoretic display according to claim 2, wherein: the processing sequence comprises a first sequence tau 1 Or a second order tau 2 The first order tau 1 The method comprises the following steps:
a 11 →a 12 →…→a 1m →a 21 →…→a 2m →…→a nm the second order tau 2 The method comprises the following steps:
a 11 →a 21 →…→a n1 →a 12 →…→a n2 →…→a nm 。
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| CN202310293849.1A CN116403536A (en) | 2023-03-24 | 2023-03-24 | Method for improving definition of electrophoresis display picture |
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| CN202310293849.1A CN116403536A (en) | 2023-03-24 | 2023-03-24 | Method for improving definition of electrophoresis display picture |
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