Liquid crystal screen splicing method and system based on image processing

Abstract

The invention relates to the technical field of liquid crystal display, in particular to a liquid crystal screen splicing method and system based on image processing, and provides a liquid crystal screen splicing system based on image processing, which comprises an image acquisition module used for receiving image signals from different data sources and converting the image signals into digital image data; the image preprocessing module is used for carrying out denoising, enhancement and color correction processing on the digital image data; and the geometric correction module is used for carrying out geometric correction on the preprocessed image to enable the preprocessed image to meet the geometric morphology required by splicing. According to the invention, the problem that pictures of a plurality of liquid crystal screens are uneven can be avoided, the visual display precision and comfort of the plurality of liquid crystal screens after splicing are improved, and meanwhile, the high consistency of colors of the plurality of liquid crystal screens after splicing can be realized; in addition, the visual effect of seamless connection of spliced pictures of a plurality of liquid crystal screens in the moving process can be guaranteed, and the overall display continuity after the liquid crystal screens are spliced is enhanced.

Description

Technical Field

[0001] The present invention relates to the field of liquid crystal display technology, and in particular to a liquid crystal screen splicing method and system based on image processing. Background Art

[0002] Liquid crystal screen is a common but widely used display device. The liquid crystal display technology used by the liquid crystal screen is to apply an electric field to the liquid crystal molecules to change the arrangement direction of the liquid crystal molecules, thereby controlling the transmission or blocking of light, and cooperating with components such as the backlight source to achieve the brightness and color changes of different pixels, and finally combine into an image or text content that can be displayed intuitively. It has important practical applications in electronic display devices such as mobile phones, computers and televisions. With the rapid development of liquid crystal display technology, liquid crystal screens have been widely used in many fields. For example, in large-scale monitoring centers, commercial displays, conference presentations and other scenarios, it is usually necessary to splice multiple LCD screens to form a larger display screen to meet the needs of displaying more information and creating better visual effects.

[0003] However, due to the differences in manufacturing process, installation position and own performance of different LCD screens, that is, the LCD screens to be assembled have certain differences in manufacturing process and may have different geometric characteristics and color performance. For example, some LCD screens may have defects such as image distortion, inconsistent color saturation and brightness. Therefore, when multiple LCD screens are spliced ​​and used, they are prone to inconsistent geometric deformation, uneven color and unnatural image connection at the splicing point. As a result, the visual display accuracy and comfort of the multiple LCD screens after splicing are poor, which seriously affects the overall display effect and user experience. In addition, the current image splicing processing is often not sophisticated enough. For the complete image content that needs to be displayed, it is simply divided into each LCD screen for display, which is easy to have obvious gaps at the splicing between the screens or unnatural image connection problems. The rapid changes in the image during the playback of dynamic video will further highlight these splicing marks, which will also affect the overall display effect after the multiple LCD screens are spliced. Summary of the invention

[0004] In view of the above-mentioned shortcomings of the prior art, the present invention provides a liquid crystal screen splicing method and system based on image processing, which can effectively solve the problem in the prior art that when multiple liquid crystal screens are spliced ​​together, they are easily affected by inconsistent geometric deformation, uneven color, and unnatural image connection at the splicing points, which affects the overall display effect.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions: The present invention provides a liquid crystal screen splicing system based on image processing, comprising an image acquisition module: used for receiving image signals from different data sources and converting them into digital image data; Image preprocessing module: used for performing denoising, enhancement and color correction processing on the digital image data; Geometric correction module: used to perform geometric correction on the pre-processed image to make it meet the geometric shape required for stitching; Color matching module: used to obtain the actual color parameters of each LCD screen and perform color matching and adjustment on the geometrically corrected image; Image segmentation and fusion module: used to segment the image into sub-images corresponding to each LCD screen according to the LCD screen splicing layout and the resolution of each screen, and fuse adjacent sub-images to eliminate splicing marks; Image transmission and display module: used to transmit the fused sub-image data to each LCD screen for display.

[0006] Furthermore, the image acquisition module is configured with multiple image sensors and corresponding interface circuits, and is compatible with multiple image input formats and resolutions.

[0007] Furthermore, the image preprocessing module uses algorithms such as median filtering, histogram equalization, and white balance adjustment to perform denoising, enhancement, and color correction processing.

[0008] Furthermore, the geometric correction module extracts image edges through an edge detection algorithm, calculates geometric transformation parameters according to a preset standard geometric model, and performs geometric transformation on the image.

[0009] Furthermore, the color matching module uses a color sensor to obtain color parameters, constructs a color mapping relationship based on a color space conversion algorithm, and uses a color lookup table to perform color matching and adjustment.

[0010] Furthermore, the image segmentation and fusion module performs image segmentation through coordinate calculation and image cropping algorithm, and feathers the segmentation edges, and the image segmentation and fusion module fuses adjacent sub-images by combining brightness gradient fusion with texture synthesis fusion.

[0011] Furthermore, the image transmission and display module is equipped with a high-speed data transmission interface and an image display controller for controlling the display effect of the image.

[0012] A liquid crystal screen splicing method based on image processing specifically comprises the following steps: S1. Image acquisition: The image acquisition module receives external image signals and converts them into digital image data, records relevant attribute information and transmits them to the image preprocessing module. The acquisition is performed according to preset parameters and ensures that the signal format is unified; S2, image preprocessing: The image preprocessing module performs denoising, enhancement and color correction on the incoming data in sequence, determines the specific parameters of each process according to the actual situation of the image, and passes the image data to the geometric correction module after processing; S3, geometric correction: The geometric correction module uses the edge detection algorithm to extract the corresponding image edge, compares the standard shape to calculate the geometric transformation parameters, uses it to correct the image geometry, and then sends the corrected image to the color matching module; S4, color matching: The color matching module obtains the color parameters of the LCD screen through the color sensor, builds a mapping relationship in a unified color space, and adjusts the image color using a color lookup table, so that the color is consistent and then transmitted to the image segmentation and fusion module; S5, Image segmentation and fusion: The image segmentation and fusion module divides the image into sub-images according to the LCD screen splicing layout and resolution through coordinate calculation and cropping algorithm, and performs edge feathering processing according to the adjacent sub-images. It also uses brightness gradient fusion and texture synthesis fusion technology for adjacent sub-images, dynamically adjusts parameters according to image features for fusion processing, and sends the sub-images to the image transmission and display module after eliminating splicing traces; S6: Image transmission and display: The image transmission and display module stably transmits the fused sub-image data to each LCD screen via a high-speed data transmission interface, and the image display controller controls the image display according to the set effect to complete the splicing display.

[0013] Compared with the known prior art, the technical solution provided by the present invention has the following beneficial effects: The present invention provides a geometric correction module, which uses precise edge detection and geometric transformation algorithms to effectively correct geometric deformation problems of each LCD screen caused by installation differences or its own characteristics, and correct image tilt caused by installation angle deviation and slight shape distortion of the screen itself, so as to ensure that the multiple LCD screens after splicing present a regular and seamless geometric form, avoid the problem of uneven images of multiple LCD screens, and improve the visual display accuracy and comfort of multiple LCD screens after splicing; The present invention provides a color matching module, which uses a color sensor to obtain the actual color parameters of each LCD screen in real time, and uses a color lookup table to perform fine adjustments based on scientific color space conversion and mapping relationships, so that the difference in initial colors between different LCD screens is reduced, and multiple LCD screens can achieve high color consistency after splicing, eliminating color unevenness and fault problems; The present invention provides an image separation and fusion module, adopts an innovative method of combining brightness gradient fusion with texture synthesis fusion, and performs detailed processing on adjacent sub-images at the splicing boundary. Not only can the picture transition be natural and smooth when displaying static images, effectively eliminating the splicing marks of multiple LCD screens, but also the fusion parameters can be dynamically adjusted in real time according to the changes in image content, ensuring that the spliced ​​pictures of multiple LCD screens maintain a seamless visual effect during movement, thereby enhancing the continuity of the overall display after the LCD screens are spliced. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0015] Figure 1 A flowchart of the specific steps of a liquid crystal screen splicing method based on image processing of the present invention; Figure 2 The present invention is a schematic diagram of the operation of a liquid crystal screen splicing system based on image processing. DETAILED DESCRIPTION

[0016] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0017] The present invention will be further described below in conjunction with the embodiments.

[0018] Example: Refer to Figure 2 , a liquid crystal screen splicing system based on image processing, comprising: Image acquisition module: used to receive image signals from different data sources and convert them into digital image data. The image acquisition module is equipped with multiple image sensors and corresponding interface circuits, and is compatible with multiple image input formats and resolutions; Image preprocessing module: used to perform denoising, enhancement and color correction on the digital image data. The image preprocessing module uses median filtering, histogram equalization, white balance adjustment and other algorithms to perform denoising, enhancement and color correction; Geometric correction module: used to perform geometric correction on the pre-processed image to make it meet the geometric form required for stitching. The geometric correction module extracts the image edge through the edge detection algorithm, calculates the geometric transformation parameters according to the preset standard geometric model, and performs geometric transformation on the image; Utilizing precise edge detection and geometric transformation algorithms, the geometric deformation problems of each LCD screen caused by installation differences or its own characteristics can be effectively corrected, and the image tilt caused by installation angle deviation and the slight shape distortion of the screen itself can be corrected, ensuring that the multiple LCD screens after splicing present a regular and seamless geometric shape, avoiding the problem of uneven images on multiple LCD screens, and improving the visual display accuracy and comfort of multiple LCD screens after splicing.

[0019] Color matching module: used to obtain the actual color parameters of each LCD screen and perform color matching and adjustment on the geometrically corrected image. The color matching module uses a color sensor to obtain color parameters, builds a color mapping relationship based on a color space conversion algorithm, and uses a color lookup table to perform color matching and adjustment; With the help of color sensors, the actual color parameters of each LCD screen are obtained in real time, and based on scientific color space conversion and mapping relationships, fine adjustments are made using color lookup tables, which reduces the initial color differences between different LCD screens. In addition, multiple LCD screens can achieve high color consistency after splicing, eliminating color unevenness and fault problems.

[0020] Image segmentation and fusion module: used to segment the image into sub-images corresponding to each LCD screen according to the LCD screen splicing layout and the resolution of each screen, and fuse adjacent sub-images to eliminate splicing traces. The image segmentation and fusion module performs image segmentation through coordinate calculation and image cropping algorithm, and feathers the segmentation edges. The image segmentation and fusion module fuses adjacent sub-images in a way that combines brightness gradient fusion with texture synthesis fusion; Image transmission and display module: used to transmit the fused sub-image data to each LCD screen for display. The image transmission and display module is equipped with a high-speed data transmission interface and an image display controller to control the display effect of the image; An innovative method combining brightness gradient fusion and texture synthesis fusion is adopted to perform detailed processing on the stitching boundaries of adjacent sub-images. This not only allows a natural and smooth transition of images when displaying static images, effectively eliminating the stitching traces of multiple LCD screens, but also dynamically adjusts the fusion parameters in real time according to changes in image content, ensuring that the stitching of multiple LCD screens maintains a seamless visual effect during movement, enhancing the continuity of the overall display after the LCD screens are spliced.

[0021] Reference Figure 1 , a liquid crystal screen splicing method based on image processing, specifically comprising the following steps: S1. Image acquisition: The image acquisition module receives external image signals and converts them into digital image data, records relevant attribute information and transmits them to the image preprocessing module. The acquisition is performed according to preset parameters and ensures that the signal format is unified; S2, image preprocessing: The image preprocessing module performs denoising, enhancement and color correction on the incoming data in sequence, determines the specific parameters of each process according to the actual situation of the image, and passes the image data to the geometric correction module after processing; S3, geometric correction: The geometric correction module uses the edge detection algorithm to extract the corresponding image edge, compares the standard shape to calculate the geometric transformation parameters, uses it to correct the image geometry, and then sends the corrected image to the color matching module; S4, color matching: The color matching module obtains the color parameters of the LCD screen through the color sensor, builds a mapping relationship in a unified color space, and adjusts the image color using a color lookup table, so that the color is consistent and then transmitted to the image segmentation and fusion module; S5, Image segmentation and fusion: The image segmentation and fusion module divides the image into sub-images according to the LCD screen splicing layout and resolution through coordinate calculation and cropping algorithm, and performs edge feathering processing according to the adjacent sub-images. It also uses brightness gradient fusion and texture synthesis fusion technology for adjacent sub-images, dynamically adjusts parameters according to image features for fusion processing, and sends the sub-images to the image transmission and display module after eliminating splicing traces; S6: Image transmission and display: The image transmission and display module stably transmits the fused sub-image data to each LCD screen via a high-speed data transmission interface, and the image display controller controls the image display according to the set effect to complete the splicing display.

[0022] The working principle of the present invention is as follows: The image acquisition module receives external image signals and converts them into digital image data, records relevant attribute information, and transmits them to the image preprocessing module; The image preprocessing module performs denoising, enhancement and color correction on the incoming data in sequence, determines the specific parameters of each process according to the actual situation of the image, and passes the image data to the geometric correction module after processing; The geometric correction module uses edge detection algorithm to extract the corresponding image edge, compares the standard shape to calculate the geometric transformation parameters, uses them to correct the image geometry, and then sends the corrected image to the color matching module. The color matching module uses precise edge detection and geometric transformation algorithms to effectively correct the geometric deformation problems caused by installation differences or their own characteristics of each LCD screen, and correct the image tilt caused by installation angle deviation and the slight shape distortion of the screen itself, ensuring that the multiple LCD screens after splicing present a regular and seamless geometry, avoiding the problem of uneven images of multiple LCD screens, and improving the visual display accuracy and comfort of multiple LCD screens after splicing; The color matching module obtains the color parameters of the LCD screen through the color sensor, builds a mapping relationship in a unified color space, and adjusts the image color with a color lookup table. After the color is consistent, it is transmitted to the image segmentation and fusion module. The color matching module uses the color sensor to obtain the actual color parameters of each LCD screen in real time, and based on scientific color space conversion and mapping relationship construction, fine adjustments are made using the color lookup table, so that the difference in initial color between different LCD screens is reduced, and multiple LCD screens can achieve high color consistency after splicing, eliminating color unevenness and fault problems; The image segmentation and fusion module divides the image into sub-images according to the LCD screen splicing layout and resolution through coordinate calculation and cropping algorithm, and performs edge feathering according to the adjacent sub-images. It also uses brightness gradient fusion and texture synthesis fusion technology for adjacent sub-images, dynamically adjusts parameters according to image features for fusion processing, and sends the sub-images to the image transmission and display module after eliminating the splicing marks. The image segmentation and fusion module adopts an innovative method of combining brightness gradient fusion and texture synthesis fusion, and performs detailed processing on the splicing boundary of adjacent sub-images, which not only allows the picture transition to be natural and smooth when displaying static images, effectively eliminating the splicing marks of multiple LCD screens, but also can dynamically adjust the fusion parameters in real time according to the changes in image content, ensuring that the spliced ​​pictures of multiple LCD screens maintain a seamless visual effect during movement, and enhancing the coherence of the overall display after the LCD screens are spliced; The image transmission and display module stably transmits the fused sub-image data to each LCD screen via a high-speed data transmission interface, and the image display controller controls the image display according to the set effect to complete the splicing display.

[0023] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of the present invention.

Claims

1. A liquid crystal screen splicing system based on image processing, characterized in that: include: Image acquisition module: used to receive image signals from different data sources and convert them into digital image data; Image preprocessing module: used for performing denoising, enhancement and color correction processing on the digital image data; Geometric correction module: used to perform geometric correction on the pre-processed image to make it meet the geometric shape required for stitching; Color matching module: used to obtain the actual color parameters of each LCD screen and perform color matching and adjustment on the geometrically corrected image; Image segmentation and fusion module: used to segment the image into sub-images corresponding to each LCD screen according to the LCD screen splicing layout and the resolution of each screen, and fuse adjacent sub-images to eliminate splicing marks; Image transmission and display module: used to transmit the fused sub-image data to each LCD screen for display.

2. The LCD screen splicing system based on image processing according to claim 1, characterized in that: The image acquisition module is configured with multiple image sensors and corresponding interface circuits, and is compatible with multiple image input formats and resolutions.

3. The LCD screen splicing system based on image processing according to claim 1, characterized in that: The image preprocessing module uses algorithms such as median filtering, histogram equalization, and white balance adjustment to perform denoising, enhancement, and color correction processing.

4. The LCD screen splicing system based on image processing according to claim 1, characterized in that: The geometric correction module extracts image edges through an edge detection algorithm, calculates geometric transformation parameters according to a preset standard geometric model, and performs geometric transformation on the image.

5. The LCD screen splicing system based on image processing according to claim 1, characterized in that: The color matching module uses a color sensor to obtain color parameters, constructs a color mapping relationship based on a color space conversion algorithm, and uses a color lookup table to perform color matching and adjustment.

6. The LCD screen splicing system based on image processing according to claim 1, characterized in that: The image segmentation and fusion module performs image segmentation through coordinate calculation and image cropping algorithm, and performs feathering processing on the segmentation edge, and the image segmentation and fusion module performs fusion processing on adjacent sub-images by combining brightness gradient fusion with texture synthesis fusion.

7. The LCD screen splicing system based on image processing according to claim 1, characterized in that: The image transmission and display module is equipped with a high-speed data transmission interface and an image display controller for controlling the display effect of the image.

8. A liquid crystal screen splicing method based on image processing, characterized in that: The specific steps include: S1. Image acquisition: The image acquisition module receives external image signals and converts them into digital image data, records relevant attribute information and transmits them to the image preprocessing module. The acquisition is performed according to preset parameters and ensures that the signal format is unified; S2, image preprocessing: The image preprocessing module performs denoising, enhancement and color correction on the incoming data in sequence, determines the specific parameters of each process according to the actual situation of the image, and passes the image data to the geometric correction module after processing; S3, geometric correction: The geometric correction module uses the edge detection algorithm to extract the corresponding image edge, compares the standard shape to calculate the geometric transformation parameters, uses it to correct the image geometry, and then sends the corrected image to the color matching module; S4, color matching: The color matching module obtains the color parameters of the LCD screen through the color sensor, builds a mapping relationship in a unified color space, and adjusts the image color using a color lookup table, so that the color is consistent and then transmitted to the image segmentation and fusion module; S5, Image segmentation and fusion: The image segmentation and fusion module divides the image into sub-images according to the LCD screen splicing layout and resolution through coordinate calculation and cropping algorithm, and performs edge feathering processing according to the adjacent sub-images. It also uses brightness gradient fusion and texture synthesis fusion technology for adjacent sub-images, dynamically adjusts parameters according to image features for fusion processing, and sends the sub-images to the image transmission and display module after eliminating splicing traces; S6: Image transmission and display: The image transmission and display module stably transmits the fused sub-image data to each LCD screen via a high-speed data transmission interface, and the image display controller controls the image display according to the set effect to complete the splicing display.

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