Real-time video seam clipping method and system based on microblaze

A real-time video and video technology, applied in image communication, selective content distribution, electrical components, etc., can solve the problems that the output of the display device cannot be well adapted, cannot meet the video seam clipping operation, and video distortion, etc. Convenient programming and debugging, real-time acquisition and processing of displayed images, and reduction of screen distortion

Active Publication Date: 2021-11-30
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Real-time video capture and display technology is widely used and plays a vital role in live broadcasting, screen monitoring and other fields, but the input of video capture equipment and the output of display equipment often cannot be well adapted
[0003] In the prior art, for the situation that the input of the video capture device and the output of the display device cannot be adapted, data processing is simply performed by widening or shrinking the video, which often leads to video distortion; in addition, the simple processing of the original video Cropping will cause the loss of information, which cannot satisfy the real-time undistorted seam clipping operation of the video

Method used

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  • Real-time video seam clipping method and system based on microblaze
  • Real-time video seam clipping method and system based on microblaze
  • Real-time video seam clipping method and system based on microblaze

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Experimental program
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Embodiment 1

[0073] With the increasing demand for real-time video applications in public life, real-time video capture and display technologies are widely used, especially in the fields of live broadcasting and screen monitoring. In the prior art, in response to the transmission requirements of real-time video, data processing is often performed by widening or shrinking the video, which often leads to video distortion; in addition, simple cropping of the original video will cause information loss, Unable to meet the real-time undistorted seam cutting operation of the video. In view of the situation that the input of the video capture device and the output of the display device cannot be adapted, this embodiment proposes a real-time video seam cutting method based on microblaze, which achieves the goal of occupying less computing resources by combining the processing system and the operation and processing mode of the programmable logic unit. In the case of searching, improve the speed of ...

Embodiment 2

[0083] In a further embodiment based on the first embodiment, a microblaze-based real-time video seam cutting method is implemented by combining the PS system processing end and the PL programmable logic end.

[0084] Specifically, the PS system processing end consists of a microblaze soft-core module and a seam cutting algorithm module, which is responsible for the scheduling and regulation of the overall operation process, and provides a processing unit for realizing the video seam cutting operation process; the PL programmable logic end is composed of Camera video acquisition module, VDMA frame buffer module, DDR storage module, HDMI display module, key control module, used to collect and display video data. Both the PS system processing end and the PL programmable logic end can interact with the DDR double-rate synchronous dynamic random access memory to read or write data, and use the AXI bus for communication protocol transmission. Among them, the software processing PS ...

Embodiment 3

[0088] In a further embodiment on the basis of Embodiment 1, the camera video capture module selects the corresponding video capture resolution according to the trigger signal, and when collecting the corresponding original video data, the camera is selected to be an OV5640 monocular camera. In a preferred embodiment, the preset The captured video image resolution is 640*480.

[0089] In order to facilitate subsequent seam cutting operations on video data, when reading the video data in the double-rate synchronous dynamic random access memory for processing and analysis, the microblaze soft core first converts the video image data from RGB to grayscale, and the corresponding conversion formula for:

[0090]

[0091] In the formula, it represents the image data after grayscale processing; Indicates the brightness value of the red channel; Indicates the brightness value of the green channel; Represents the luminance value of the blue channel.

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Abstract

The invention provides a real-time video seam clipping method and system based on microblaze. The method and system can be used for performing seam clipping processing and real-time display after video acquisition. The system is jointly realized by a PL end and a PS end, an improved video seam clipping operation method is combined to process an image, and compared with an original Seam Carving algorithm, when the image is shrunk or magnified, video information is reserved, picture distortion is further reduced, and a user can obtain a better visual effect; on the other hand, the system provided by the invention is small in resource occupation and strong in portability, has the advantages of convenience in software programming debugging and high hardware calculation processing speed, improves the processing speed and reduces the time delay through the cooperative work of software and hardware, can randomly change the picture size while keeping the complete information of the displayed video, can be adapted to display equipment of various specifications, and is suitable for various live streaming or monitoring scenes.

Description

technical field [0001] The invention relates to a microblaze-based real-time video seam cutting method and system, in particular to the technical field of video image processing. Background technique [0002] Real-time video capture and display technology is widely used and plays a vital role in live broadcasting, screen monitoring and other fields. However, the input of video capture equipment and the output of display equipment often cannot be well adapted. [0003] In the prior art, for the situation that the input of the video capture device and the output of the display device cannot be adapted, data processing is simply performed by widening or shrinking the video, which often leads to video distortion; in addition, the simple processing of the original video Cropping will cause the loss of information, which cannot satisfy the real-time undistorted seam clipping operation of the video. Contents of the invention [0004] Purpose of the invention: to propose a microb...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N21/426H04N21/433H04N21/44H04N21/4402H04N21/472
CPCH04N21/42653H04N21/42692H04N21/4334H04N21/4331H04N21/44016H04N21/440263H04N21/47205
Inventor 李丽王峰傅玉祥孙玉祥何书专李伟
Owner NANJING UNIV
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