CN118264781A - Frame processing and displaying method and device for color image data - Google Patents

Frame processing and displaying method and device for color image data Download PDF

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Publication number
CN118264781A
CN118264781A CN202410330495.8A CN202410330495A CN118264781A CN 118264781 A CN118264781 A CN 118264781A CN 202410330495 A CN202410330495 A CN 202410330495A CN 118264781 A CN118264781 A CN 118264781A
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frame
image
sub
pixel
color image
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王鹏
王鹍
时大鑫
王修齐
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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
    • 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
    • G09G3/2007—Display of intermediate tones
    • G09G3/2018—Display of intermediate tones by time modulation using two or more time intervals
    • G09G3/2022—Display of intermediate tones by time modulation using two or more time intervals using sub-frames
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G5/00—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/64—Circuits for processing colour signals
    • H04N9/74—Circuits for processing colour signals for obtaining special effects
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2300/00—Aspects of the constitution of display devices
    • G09G2300/04—Structural and physical details of display devices
    • G09G2300/0439—Pixel structures
    • G09G2300/0452—Details of colour pixel setup, e.g. pixel composed of a red, a blue and two green components
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2310/00—Command of the display device
    • G09G2310/04—Partial updating of the display screen
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2340/00—Aspects of display data processing

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Image Processing (AREA)

Abstract

The application provides a framing processing and displaying method and device of color image data, wherein the method comprises the following steps: continuously receiving color video images, and acquiring three primary color values corresponding to each pixel in each frame of color image; splitting each frame of color image into a plurality of sub-frame images correspondingly; the plurality of sub-frame images are processed in different channels respectively and then displayed individually or in combination. According to the application, the received color video images are processed, each frame of color image is split, a plurality of sub-frame images are processed and then sequentially displayed, and the obtained display images can be normally watched by human eyes, but when shooting is carried out on the display images by using shooting equipment, the complete display images cannot be obtained; the application can prevent the display picture from being obtained and transmitted by the shooting equipment while ensuring that the viewer can normally watch the display picture, thereby playing a secret effect on the display content.

Description

Frame processing and displaying method and device for color image data
Technical Field
The present invention relates to the field of image processing technologies, and in particular, to a method and an apparatus for processing and displaying color image data in frames.
Background
The image in a conventional digital camera, computer or mobile phone is generally composed of pixels arranged in a matrix. Each pixel is usually represented by three components of red (R), green (G) and blue (B), the values of the components are between 0 and 255, and the three components are mixed together according to different proportions to form various colors, so that various images are formed.
In the electronic technology currently prevailing in digital signals, various graphic image and audio-video signals are stored, processed and transmitted in binary digital format. In general, transmission and display of images are performed in units of "frames", and all data of one frame of image is transmitted and displayed as a whole.
The existing graphic images and videos are easy to record by the shooting equipment when displayed and played, but in a scene needing to be watched in a secret mode, in order to prevent the outward transmission, the shooting equipment needs to be prevented from shooting the display picture. Therefore, how to avoid the shooting device from recording the display screen without affecting the normal viewing of the screen by the viewer is a problem to be solved.
Disclosure of Invention
The invention provides a framing processing and displaying method and device for color image data, which solve the problem of how to record a display picture by shooting equipment without influencing the normal watching picture of a viewer under the scene of secret watching when images and videos are output and displayed.
In order to solve the technical problems, the technical scheme adopted by the invention is to provide a framing processing and displaying method of color image data, which comprises the following steps: continuously receiving color video images, and acquiring three primary color values corresponding to each pixel in each frame of color image; correspondingly splitting the color image of each frame into a plurality of sub-frame images, wherein the three primary color values of each pixel in the color image are equal to the sum of the three primary color values of the corresponding pixels of the plurality of sub-frame images; and respectively processing the plurality of sub-frame images in different channels, and then performing single display or combined display.
In some embodiments, in the step of splitting each frame of the color image into a plurality of sub-frame images, each frame of the color image is split into a first sub-frame image and a second sub-frame image; wherein the three primary color values of each pixel in the odd-numbered lines of the first subframe image are equal to the three primary color values of the corresponding pixels in the odd-numbered lines of the color image, and the three primary color values of each pixel in the even-numbered lines of the first subframe image are equal to 0; the three primary color values of each pixel of the even lines of the second subframe image are equal to the three primary color values of the corresponding pixels of the even lines of the color image, and the three primary color values of each pixel of the odd lines of the second subframe image are equal to 0.
In some embodiments, in the step of splitting each frame of the color image into a plurality of sub-frame images, each frame of the color image is split into a first sub-frame image and a second sub-frame image; wherein the three primary color values of each pixel of the odd columns of the first subframe image are equal to the three primary color values of the corresponding pixels of the odd columns of the color image, and the three primary color values of each pixel of the even columns of the first subframe image are equal to 0; the three primary color values of each pixel of the even columns of the second subframe image are equal to the three primary color values of the corresponding pixels of the even columns of the color image, and the three primary color values of each pixel of the odd columns of the second subframe image are equal to 0.
In some embodiments, in the step of splitting each frame of the color image into a plurality of sub-frame images, each frame of the color image is split into a first sub-frame image and a second sub-frame image; wherein the three primary color values of each pixel of the odd columns in the odd rows and each pixel of the even columns in the even rows of the first subframe image are equal to the three primary color values of the corresponding pixels of the odd columns in the odd rows and the corresponding pixels of the even columns in the even rows of the color image, and the three primary color values of each pixel of the even columns in the odd rows and each pixel of the odd columns in the even rows of the first subframe image are equal to 0; the three primary color values of each pixel of the even columns in the odd rows and each pixel of the odd columns in the even rows of the second subframe image are equal to the three primary color values of the corresponding pixels of the even columns in the odd rows and the corresponding pixels of the odd columns in the even rows of the color image, and the three primary color values of each pixel of the odd columns in the odd rows and each pixel of the even columns in the odd rows of the second subframe image are equal to 0.
In some embodiments, in the step of splitting each frame of the color image correspondence into a plurality of sub-frame images, each frame of the color image correspondence is split into a first sub-frame image, a second sub-frame image, and a third sub-frame image; wherein the three primary color values include a red color value, a green color value, and a blue color value; the red value of each pixel in the first subframe image is equal to the red value of the corresponding pixel in the color image, and the green value and the blue value of each pixel in the first subframe image are both equal to 0; the green value of each pixel in the second subframe image is equal to the green value of the corresponding pixel in the color image, and the red value and the blue value of each pixel in the second subframe image are both equal to 0; and the blue value of each pixel in the third sub-frame image is equal to the blue value of the corresponding pixel in the color image, and the red value and the green value of each pixel in the third sub-frame image are both equal to 0.
In some embodiments, the combined display includes: and after the color video image is output and displayed in sequence, the refresh rate of the display terminal is a first refresh rate, the refresh rate of the display terminal is a second refresh rate, the second refresh rate is n times of the first refresh rate, and n is an integer greater than or equal to 2.
In some embodiments, the plurality of the subframe images are processed separately in different channels, including: inputting the split sub-frame images into different channels, and respectively scrambling the sub-frame images to obtain a plurality of sub-frame scrambled images.
In some embodiments, the individual display includes: if the user is an illegal user, a plurality of sub-frame scrambling images are displayed independently; the combined display includes: if the user is legal, descrambling and combining the plurality of sub-frame scrambling images through the secret key to obtain the color image, and outputting and displaying the color image.
In some embodiments, the combined display further comprises: the number of legal users is multiple, the keys of each legal user are different, the scrambling images of the subframes are descrambled and combined through different keys, so that a plurality of different display images corresponding to the legal users are obtained, and the display images are output and displayed respectively.
The invention also provides a framing processing and displaying device of the color image data, which comprises: a receiving unit for continuously receiving color video images and obtaining three primary color values corresponding to each pixel in each frame of color image; a splitting unit, configured to split each frame of the color image into a plurality of sub-frame images, where the three primary color values of each pixel in the color image are equal to the sum of the three primary color values of the corresponding pixels in the plurality of sub-frame images; and the display unit is used for outputting the plurality of sub-frame images respectively in different channels for single display or combined display.
The beneficial effects of the invention are as follows: the invention discloses a framing processing and displaying method and device of color image data, wherein the method comprises the following steps: continuously receiving color video images, and acquiring three primary color values corresponding to each pixel in each frame of color image; splitting each frame of color image into a plurality of sub-frame images correspondingly, wherein the three primary color values of each pixel in the color image are equal to the sum of the three primary color values of the corresponding pixels of the plurality of sub-frame images; the plurality of sub-frame images are processed in different channels respectively and then displayed individually or in combination. The device comprises: a receiving unit for continuously receiving color video images and obtaining three primary color values corresponding to each pixel in each frame of color image; a splitting unit, configured to split each frame of color image into a plurality of sub-frame images, where the three primary color values of each pixel in the color image are equal to the sum of the three primary color values of the corresponding pixels of the plurality of sub-frame images; and the display unit is used for respectively outputting the plurality of sub-frame images in different channels for single display or combined display. According to the invention, the received color video images are processed, each frame of color image is split, a plurality of sub-frame images are processed and then sequentially displayed, the obtained display images can be normally watched by human eyes, but when the shooting equipment shoots the display images, the complete display images cannot be obtained; the invention prevents the shooting equipment from recording the display picture and has the effect of confidentiality on the display picture while ensuring that the viewer can watch the picture normally.
Drawings
FIG. 1 is a flow chart of a method for framing and displaying color image data according to an embodiment of the present application;
FIG. 2 is a schematic diagram of two states of a color image in a framing processing and displaying method of color image data according to an embodiment of the present application;
FIG. 3 is a schematic diagram showing another state of a color image in a framing processing and displaying method of color image data according to an embodiment of the present application;
FIG. 4 is a schematic diagram of an embodiment of color image splitting in a method for framing and displaying color image data according to an embodiment of the present application;
FIG. 5 is a schematic diagram of another embodiment of color image splitting in a method for framing and displaying color image data according to an embodiment of the present application;
FIG. 6 is a schematic diagram of another embodiment of color image splitting in a method for framing and displaying color image data according to an embodiment of the present application;
FIG. 7 is a schematic diagram of a first sub-frame image of another embodiment of color image splitting in a method for framing and displaying color image data according to an embodiment of the present application;
FIG. 8 is a schematic diagram of a second sub-frame image of another embodiment of color image splitting in a method for framing and displaying color image data according to an embodiment of the present application;
FIG. 9 is a schematic diagram of a third sub-frame image of another embodiment of color image splitting in a method for framing and displaying color image data according to an embodiment of the present application;
FIG. 10 is a schematic diagram of the two sub-frame images of FIG. 4 after scrambling;
FIG. 11 is a schematic diagram of a plurality of display images in a method for framing and displaying color image data according to an embodiment of the present application;
fig. 12 is a schematic diagram of a frame processing and display device for color image data according to an embodiment of the present application.
Detailed Description
In order that the invention may be readily understood, a more particular description thereof will be rendered by reference to specific embodiments that are illustrated in the appended drawings. Preferred embodiments of the present invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and/or" as used in this specification includes any and all combinations of one or more of the associated listed items.
In order to facilitate an understanding of the present application, embodiments of the present application will be briefly described herein:
Pixels are the fundamental units of an image, and an image is composed of a plurality of pixels, and the size of the image is generally expressed by the number of pixels. Each pixel of a color image is represented by three components of red (R), green (G), and blue (B), each corresponding to a set of 8-bit binary numbers in a computer, that is, the three components of red (R), green (G), and blue (B) each have 2 8 =256 colors, so that the computer can exhibit 256×256×256=16777216 colors in total.
Fig. 1 shows a flowchart of the implementation of the framing processing and displaying method of color image data provided by the present application, including the steps of:
s1: and continuously receiving the color video images, and acquiring three primary color values corresponding to each pixel in each frame of color image.
S2: splitting each frame of color image into multiple sub-frame images, wherein the three primary color values of each pixel in the color image are equal to the sum of the three primary color values of the corresponding pixels of the multiple sub-frame images.
S3: the plurality of sub-frame images are processed in different channels respectively and then displayed individually or in combination.
The application processes the received color video image, and splits each frame of color image to obtain a plurality of sub-frame images, which are sequentially displayed in sequence, and the obtained display picture can be normally watched by human eyes, but when the shooting equipment shoots the display picture, the complete display picture cannot be obtained. The application prevents the shooting equipment from recording the display picture and has the effect of confidentiality on the display picture while ensuring that the viewer can watch the picture normally.
The present application will be described in detail with reference to fig. 1 to 12.
As shown in fig. 1, the method for framing and displaying color image data according to the embodiment of the present application is described in detail as follows:
s1: and continuously receiving the color video images, and acquiring three primary color values corresponding to each pixel in each frame of color image.
Wherein the color video image comprises a plurality of frames of color image 1. Fig. 2 and 3 show three representation modes of the color image 1: the left half of fig. 2 shows a visualized color image 1 which can be directly observed by the human eye; the right half of fig. 2 represents a color image 1 composed of a plurality of pixels 2 arranged in a matrix; fig. 3 shows a color image 1 formed by three primary color values 21 (i.e., three components of red (R), green (G), and blue (B)) corresponding to each pixel 2 in fig. 2, wherein the three primary color values 21 include a red color value 22, a green color value 23, and a blue color value 24.
Color video images are continuously received from electronic devices including, but not limited to, computers, cameras, cell phones, and the like, all media capable of storing images.
And transmitting the received color video image to a controller to be further split.
S2: splitting each frame of color image into multiple sub-frame images, wherein the three primary color values of each pixel in the color image are equal to the sum of the three primary color values of the corresponding pixels of the multiple sub-frame images.
Splitting each frame of color image 1 into L (L is an integer not less than 2) sub-frame images, and then the three primary color values 21 of each pixel 2 in each frame of color image 1 are equal to the sum of the three primary color values 21 of the corresponding pixels 2 of the L sub-frame images. That is, the red value 22 of each pixel 2 in each frame of color image 1 is equal to the sum of the red values 22 of the corresponding pixels 2 of the L sub-frame images; the green value 23 of each pixel 2 in each frame of color image 1 is equal to the sum of the green values 23 of the corresponding pixels 2 of the L sub-frame images; the blue value 24 of each pixel 2 in each frame of color image 1 is equal to the sum of the blue values 24 of the corresponding pixels 2 of the L sub-frame images. The above can be expressed by the following formula:
dRl(m,n)＝kl(m,n)×dR(m,n)
dGl(m,n)＝tl(m,n)×dG(m,n)
dBl(m,n)＝pl(m,n)×dB(m,n)
Where d represents any one of the pixels 2 in the color image 1, (m, n) represents the abscissa of this pixel 2, l represents the first sub-frame image, its value range is (1, l), R represents the red value 22 of the pixel 2, g represents the green value 23 of the pixel 2, b represents the blue value 24 of the pixel 2, k, t, p represent the proportion of the red value 22, the green value 23 and the blue value 24 of the pixel 2 of each sub-frame image to the corresponding values in the color image 1, dR (m, n), dG (m, n) and dB (m, n) represent the red value 22, the green value 23 and the blue value 24 of any one of the pixels 2 in the color image 1, dR l(m,n)＝、dGl (m, n) and dB l (m, n) represent the red value 22, the green value 23 and the blue value 24 of the corresponding pixel 2 in the first sub-frame image, respectively, and the above-mentioned requirements are satisfied:
Specifically, as an alternative embodiment of the present application, as shown in fig. 4, each frame of color image 1 is split into a first sub-frame image 11 and a second sub-frame image 12, respectively.
Wherein the three primary color value 21 of each pixel 2 of the odd lines of the first sub-frame image 11 is equal to the three primary color value 21 of the corresponding pixel 2 of the odd lines of the color image 1, and the three primary color value 21 of each pixel 2 of the even lines of the first sub-frame image 11 is equal to 0.
The three primary color value 21 of each pixel 2 of the even lines of the second sub-frame image 12 is equal to the three primary color value 21 of the corresponding pixel 2 of the even lines of the color image 1, and the three primary color value 21 of each pixel 2 of the odd lines of the second sub-frame image 12 is equal to 0.
As can be seen from the foregoing formulas, in this embodiment, k, t, p of all pixels 2 of the odd-numbered rows of the first sub-frame image 11 and the second sub-frame image 12 need to satisfy: k 1＝1,t1＝1,p1＝1;k2＝0,t2＝0,p2 = 0. While k, t, p of all pixels 2 of even rows of the first sub-frame image 11 and the second sub-frame image 12 need to satisfy: k 1＝0,t1＝0,p1＝0;k2＝1,t2＝1,p2 =1.
As another alternative embodiment of the present application, as shown in fig. 5, each frame of color image 1 is split into a first sub-frame image 11 and a second sub-frame image 12, respectively.
Wherein the three primary color value 21 of each pixel 2 of the odd columns of the first sub-frame image 11 is equal to the three primary color value 21 of the corresponding pixel 2 of the odd columns of the color image 1, and the three primary color value 21 of each pixel 2 of the even columns of the first sub-frame image 11 is equal to 0.
The three primary color value 21 of each pixel 2 of the even columns of the second sub-frame image 12 is equal to the three primary color value 21 of the corresponding pixel 2 of the even columns of the color image 1, and the three primary color value 21 of each pixel 2 of the odd columns of the second sub-frame image 12 is equal to 0.
As can be seen from the foregoing formulas, in this embodiment, k, t, p of all pixels 2 of the odd columns of the first sub-frame image 11 and the second sub-frame image 12 need to satisfy: k 1＝1,t1＝1,p1＝1;k2＝0,t2＝0,p2 = 0. While k, t, p of all pixels 2 of even columns of the first sub-frame image 11 and the second sub-frame image 12 need to satisfy: k 1＝0,t1＝0,p1＝0;k2＝1,t2＝1,p2 =1.
As another alternative embodiment of the present application, as shown in fig. 6, each frame of color image 1 is split into a first sub-frame image 11 and a second sub-frame image 12, respectively.
Wherein the three primary color value 21 of each pixel2 of the odd columns in the odd rows and each pixel2 of the even columns in the even rows of the first subframe image 11 is equal to the three primary color value 21 of the corresponding pixel2 of the odd columns in the odd rows and the corresponding pixel2 of the even columns in the even rows of the color image 1, and the three primary color value 21 of each pixel2 of the even columns in the odd rows and each pixel2 of the odd columns in the even rows of the first subframe image 11 is equal to 0.
The three primary color value 21 of each pixel 2 of the even columns in the odd rows and each pixel 2 of the odd columns in the even rows of the second subframe image 12 is equal to the three primary color value 21 of the corresponding pixel 2 of the even columns in the odd rows and the corresponding pixel 2 of the odd columns in the even rows of the color image 1, and the three primary color value 21 of each pixel 2 of the odd columns in the odd rows and each pixel 2 of the even columns in the odd rows of the second subframe image 12 is equal to 0.
As can be seen from the foregoing formulas, in this embodiment, k, t, p of each pixel 2 of the odd columns in the odd rows and each pixel 2 of the even columns in the even rows of the first sub-frame image 11 and the second sub-frame image 12 need to satisfy: k 1＝1,t1＝1,p1＝1;k2＝0,t2＝0,p2 = 0. While k, t, p of each pixel 2 of even columns in odd rows and each pixel 2 of odd columns in even rows of the first sub-frame image 11 and the second sub-frame image 12 need to satisfy: k 1＝0,t1＝0,p1＝0;k2＝1,t2＝1,p2 =1.
As another alternative embodiment of the present application, as shown in fig. 7 to 9, each frame of color image 1 is split into a first sub-frame image 11, a second sub-frame image 12, and a third sub-frame image 13, respectively.
Referring to fig. 3, the three primary color values 21 include a red color value 22, a green color value 23, and a blue color value 24.
The red value 22 of each pixel 2 in the first sub-frame image 11 is equal to the red value 22 of the corresponding pixel 2 in the color image 1, and the green value 23 and the blue value 24 of each pixel 2 in the first sub-frame image 11 are equal to 0.
The green value 23 of each pixel 2 in the second sub-frame image 12 is equal to the green value 23 of the corresponding pixel 2 in the color image 1, and the red value 22 and the blue value 24 of each pixel 2 in the second sub-frame image 12 are equal to 0.
The blue value 24 of each pixel 2 in the third sub-frame image 13 is equal to the blue value 24 of the corresponding pixel 2 in the color image 1, and the red value 22 and the green value 23 of each pixel 2 in the third sub-frame image 13 are equal to 0.
As can be seen from the foregoing formula, in this embodiment, k, t, p of all pixels 2 of the first sub-frame image 11 need to satisfy: k 1＝1,t1＝0,p1 =0; the k, t, p of all pixels 2 of the second sub-frame image 12 have to be: k 2＝0,t2＝1,p2 =0; the k, t, p of all pixels 2 of the third sub-frame image 13 need to satisfy: k 3＝0,t3＝0,p3 =1.
It should be noted that, the method for splitting the color image 1 provided by the present application includes, but is not limited to, the above embodiment, and may be adjusted according to actual needs, for example, splitting all pixels 2 of the color image 1 into a plurality of portions according to different shapes, or splitting the color image 1 according to different widths of the pixels 2, where the above method ensures that all split sub-frame images can be combined to form the original color image 1.
S3: the plurality of sub-frame images are processed in different channels respectively and then displayed individually or in combination.
Specifically, in this embodiment, the multiple sub-frame images split in the step S2 are input into different channels, and scrambling processing is performed on the multiple sub-frame images respectively, so as to obtain multiple sub-frame scrambled images.
The scrambling may be to add noise to the sub-frame image, to regularly rearrange pixels of the sub-frame image, to change the three primary color values of a plurality of pixels of the sub-frame image differently, or the like.
Taking the split first sub-frame image 11 and second sub-frame image 12 in fig. 4 as an example, they are subjected to scrambling processing respectively: i.e. adding x or y to the three primary color values 21 of all pixels 2 in even lines of the first sub-frame image 11, and adding the interference data to obtain a first sub-frame scrambled image 14 as shown in fig. 10; the interference data is superimposed by adding x or y to the three primary color values 21 of all pixels 2 of the odd-numbered rows of the second sub-frame image 12, respectively, to obtain a second sub-frame scrambled image 15 as shown in fig. 10.
Further, for different users, the scrambled images of the plurality of subframes after scrambling processing are respectively processed and displayed.
When the user is an illegal user, the user does not have a key capable of descrambling the plurality of sub-frame scrambled images, and therefore the plurality of sub-frame scrambled images are directly displayed separately (i.e., the illegal user cannot see the original color image 1 as shown in fig. 2).
When the user is a legal user, the user has a key capable of descrambling the plurality of sub-frame scrambled images, and then descrambles and combines the plurality of sub-frame scrambled images by the key to obtain the original color image 1 shown in fig. 2, and outputs and displays the original color image.
Further, when the number of legal users is multiple, the keys of each legal user are different, and the scrambling images of the subframes are respectively descrambled and combined through different keys to obtain a plurality of different display images corresponding to the legal users, and the display images are respectively output and displayed.
As shown in fig. 11, the above procedure is suitable for the occasion where the computer is required to perform the examination, and fig. 11 shows an examination scene, in which a plurality of computers are placed side by side, including a computer display screen 3, a keyboard 31 and an examination screen 32. The plurality of examinees correspond to a plurality of legal users, the secret keys of each examinee are different, and the examination pictures 32 (namely the display images) of the seen computer display screen 3 are also different, so that the mutual watching among the adjacent examinees is effectively prevented, and the authenticity of the examination results is ensured.
Further, if multiple examinees want to see the same examination picture 32 and ensure that they cannot watch each other, the examinees can wear special glasses (e.g. polarized glasses) corresponding to the examinees, and after all the examinees wear the glasses corresponding to the examinees, the examination picture 32 on the computer display screen 3 of the examinees can be changed, and different glasses can change the examination picture 32 corresponding to the examinees, and finally, the examination picture 32 can be converted into a uniform examination picture 32, namely, the color image 1 shown in fig. 2.
As another optional embodiment of the present application, after the plurality of sub-frame images are processed in different channels, a combined display is performed, including: after the color video image is output, the refresh rate of the display terminal is a first refresh rate, a plurality of sub-frame images are sequentially output and combined to be displayed according to time sequence, the refresh rate of the display terminal is a second refresh rate, the second refresh rate is n times of the first refresh rate, and n is an integer greater than or equal to 2.
The refresh rate refers to the number of times each pixel data in the display image is updated per second, in short, the refresh rate is the number of times the screen is refreshed per second, and the higher the refresh rate, the better the stability of the displayed image (picture). Display terminals include, but are not limited to, liquid crystal displays, LED displays, and the like, all media capable of displaying images.
Referring to fig. 1 to 9, the color video image received in S1, which is not split, has a refresh rate at the display terminal of a first refresh rate. In S2, splitting each frame of color image 1 in the color video images, outputting and displaying the split sub-frame images sequentially according to time sequence, and the refresh rate at the display terminal is the second refresh rate. The second refresh rate is n times the first refresh rate, n is an integer greater than or equal to 2, and n simultaneously represents the number of sub-frames of the color image 1 after splitting.
Specifically, in this embodiment, the first refresh rate is 60Hz. Further combining several embodiments in S2, when each frame of color image 1 is split into two sub-frame images, all the split sub-frame images are arranged and output according to a correct sequence, and the second refresh rate at the display terminal is 120Hz, which is twice the first refresh rate; when each frame of color image 1 is split into three sub-frame images, all the split sub-frame images are arranged and output according to the correct sequence, and the second refresh rate of the display terminal is 180Hz and is three times of the first refresh rate; and so on, splitting the color image 1 into n sub-frame images, the second refresh rate is n times the first refresh rate.
Further, after the color image 1 is split, when the display terminal displays, the human eyes are used for directly watching, and the split sub-frame images are displayed in a front-back split way due to the visual persistence effect of the human eyes, but can be synthesized into a complete color image 1 in the brain, so that the normal watching of a viewer is not influenced. When the photographing device is used for photographing, the frequency of the photographing device is high, and the plurality of sub-frame images are displayed in a front-back separated mode, so that only part of sub-frame images in the sub-frame images can be photographed, and a complete color image 1 cannot be obtained. The frequency of the photographing apparatus generally refers to the refresh rate of its photosensitive element, that is, the number of frames of images that the photographing apparatus can photograph per second. Therefore, the application can effectively prevent the color video image being displayed from being recorded by the shooting equipment by changing the refresh rate of the display terminal by acquiring the color video image and splitting each frame of color image 1 and outputting and displaying the color video image in sequence, and meanwhile, the normal watching of human eyes is not influenced, the function of secret watching is played, and the leakage and propagation of confidential files are prevented.
Fig. 12 is a schematic diagram showing the composition of a frame processing and displaying device for color image data according to an embodiment of the present application, and only the portions related to the embodiment of the present application are shown for convenience of explanation.
Referring to fig. 12, the framing processing and displaying device of color image data includes:
A receiving unit 4 for continuously receiving color video images, acquiring three primary color values 21 corresponding to the respective pixels 2 in each frame of the color image 1.
A splitting unit 5, configured to split each frame of color image 1 into a plurality of sub-frame images, where the three primary color values 21 of each pixel 2 in the color image 1 are equal to the sum of the three primary color values 21 of the corresponding pixels 2 of the plurality of sub-frame images.
And a display unit 6 for outputting the plurality of sub-frame images in different channels respectively, and performing single display or combined display.
It should be noted that, because the foregoing framing processing and displaying device of color image data is based on the same concept as the embodiment of the method of the present application, specific functions, processes of implementing respective functions by each unit, and technical effects thereof may be specifically referred to the description of the embodiment of the foregoing framing processing and displaying method of color image data, which is not repeated herein.
The invention discloses a framing processing and displaying method and device of color image data, wherein the method comprises the following steps: continuously receiving color video images, and acquiring three primary color values corresponding to each pixel in each frame of color image; splitting each frame of color image into a plurality of sub-frame images correspondingly, wherein the three primary color values of each pixel in the color image are equal to the sum of the three primary color values of the corresponding pixels of the plurality of sub-frame images; the plurality of sub-frame images are processed in different channels respectively and then displayed individually or in combination. The device comprises: a receiving unit for continuously receiving color video images and obtaining three primary color values corresponding to each pixel in each frame of color image; a splitting unit, configured to split each frame of color image into a plurality of sub-frame images, where the three primary color values of each pixel in the color image are equal to the sum of the three primary color values of the corresponding pixels of the plurality of sub-frame images; and the display unit is used for respectively outputting the plurality of sub-frame images in different channels for single display or combined display. According to the invention, the received color video images are processed, each frame of color image is split, a plurality of sub-frame images are processed and then sequentially displayed, the obtained display images can be normally watched by human eyes, but when the shooting equipment shoots the display images, the complete display images cannot be obtained; the invention prevents the shooting equipment from recording the display picture while ensuring that the viewer can watch the display picture normally, and has the effect of confidentiality on the display picture.
The foregoing is only illustrative of the present invention and is not to be construed as limiting the scope of the invention, and all equivalent structural changes made by the present invention and the accompanying drawings, or direct or indirect application in other related technical fields, are included in the scope of the present invention.

Claims (10)

1. A framing processing and displaying method of color image data, comprising the steps of:
Continuously receiving color video images, and acquiring three primary color values corresponding to each pixel in each frame of color image;
correspondingly splitting the color image of each frame into a plurality of sub-frame images, wherein the three primary color values of each pixel in the color image are equal to the sum of the three primary color values of the corresponding pixels of the plurality of sub-frame images;
and respectively processing the plurality of sub-frame images in different channels, and then performing single display or combined display.
2. The frame processing and displaying method of color image data according to claim 1, wherein in said step of splitting each frame of said color image correspondence into a plurality of sub-frame images, each frame of said color image correspondence is split into a first sub-frame image and a second sub-frame image;
Wherein the three primary color values of each pixel in the odd-numbered lines of the first subframe image are equal to the three primary color values of the corresponding pixels in the odd-numbered lines of the color image, and the three primary color values of each pixel in the even-numbered lines of the first subframe image are equal to 0;
The three primary color values of each pixel of the even lines of the second subframe image are equal to the three primary color values of the corresponding pixels of the even lines of the color image, and the three primary color values of each pixel of the odd lines of the second subframe image are equal to 0.
3. The frame processing and displaying method of color image data according to claim 1, wherein in said step of splitting each frame of said color image correspondence into a plurality of sub-frame images, each frame of said color image correspondence is split into a first sub-frame image and a second sub-frame image;
wherein the three primary color values of each pixel of the odd columns of the first subframe image are equal to the three primary color values of the corresponding pixels of the odd columns of the color image, and the three primary color values of each pixel of the even columns of the first subframe image are equal to 0;
The three primary color values of each pixel of the even columns of the second subframe image are equal to the three primary color values of the corresponding pixels of the even columns of the color image, and the three primary color values of each pixel of the odd columns of the second subframe image are equal to 0.
4. The frame processing and displaying method of color image data according to claim 1, wherein in said step of splitting each frame of said color image correspondence into a plurality of sub-frame images, each frame of said color image correspondence is split into a first sub-frame image and a second sub-frame image;
Wherein the three primary color values of each pixel of the odd columns in the odd rows and each pixel of the even columns in the even rows of the first subframe image are equal to the three primary color values of the corresponding pixels of the odd columns in the odd rows and the corresponding pixels of the even columns in the even rows of the color image, and the three primary color values of each pixel of the even columns in the odd rows and each pixel of the odd columns in the even rows of the first subframe image are equal to 0;
The three primary color values of each pixel of the even columns in the odd rows and each pixel of the odd columns in the even rows of the second subframe image are equal to the three primary color values of the corresponding pixels of the even columns in the odd rows and the corresponding pixels of the odd columns in the even rows of the color image, and the three primary color values of each pixel of the odd columns in the odd rows and each pixel of the even columns in the odd rows of the second subframe image are equal to 0.
5. The frame processing and displaying method of color image data according to claim 1, wherein in said step of splitting each frame of said color image correspondence into a plurality of sub-frame images, each frame of said color image correspondence is split into a first sub-frame image, a second sub-frame image and a third sub-frame image;
wherein the three primary color values include a red color value, a green color value, and a blue color value;
the red value of each pixel in the first subframe image is equal to the red value of the corresponding pixel in the color image, and the green value and the blue value of each pixel in the first subframe image are both equal to 0;
The green value of each pixel in the second subframe image is equal to the green value of the corresponding pixel in the color image, and the red value and the blue value of each pixel in the second subframe image are both equal to 0;
And the blue value of each pixel in the third sub-frame image is equal to the blue value of the corresponding pixel in the color image, and the red value and the green value of each pixel in the third sub-frame image are both equal to 0.
6. The framing processing and displaying method of color image data according to claim 1, wherein said combined display comprises:
And after the color video image is output and displayed in sequence, the refresh rate of the display terminal is a first refresh rate, the refresh rate of the display terminal is a second refresh rate, the second refresh rate is n times of the first refresh rate, and n is an integer greater than or equal to 2.
7. The framing processing and displaying method of color image data according to claim 1, wherein a plurality of said sub-frame images are processed respectively in different channels, comprising:
Inputting the split sub-frame images into different channels, and respectively scrambling the sub-frame images to obtain a plurality of sub-frame scrambled images.
8. The framing processing and displaying method of color image data according to claim 7, wherein said individually displaying includes: if the user is an illegal user, a plurality of sub-frame scrambling images are displayed independently;
the combined display includes: if the user is legal, descrambling and combining the plurality of sub-frame scrambling images through the secret key to obtain the color image, and outputting and displaying the color image.
9. The framing processing and displaying method of color image data according to claim 8, wherein said combined display further comprises:
the number of legal users is multiple, the keys of each legal user are different, the scrambling images of the subframes are descrambled and combined through different keys, so that a plurality of different display images corresponding to the legal users are obtained, and the display images are output and displayed respectively.
10. A framing processing and display device for color image data, comprising:
A receiving unit for continuously receiving color video images and obtaining three primary color values corresponding to each pixel in each frame of color image;
A splitting unit, configured to split each frame of the color image into a plurality of sub-frame images, where the three primary color values of each pixel in the color image are equal to the sum of the three primary color values of the corresponding pixels in the plurality of sub-frame images;
And the display unit is used for outputting the plurality of sub-frame images respectively in different channels for single display or combined display.
CN202410330495.8A 2024-03-21 2024-03-21 Frame processing and displaying method and device for color image data Pending CN118264781A (en)

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