Multi-picture splicing method and device

Abstract

The invention discloses a multi-image splicing method. The method includes the following steps: a memory space corresponding to a whole display screen is divided into more than two sub-blocks; the corresponding relationship between each source-video and the sub-block is defined; wherein, one source-video corresponds to more than one sub-block which can just correspond to one source-video; the sum of each sub-block corresponding to each source-video is regarded as a sub-memory-space corresponding to the source-video; the image of the source-video is scaled into a target image according to the size of the sub-memory-space corresponding to each source-video; the target image data of each source-video is written into the sub-memory-space corresponding to the source-video; an video image is read from the memory space corresponding to the whole display screen and displayed on the display screen. The invention also discloses a multi-image splicing device. The technical proposal of the invention can be flexibly realized and can save memory source.

Description

technical field [0001] The invention relates to the technical field of image processing, in particular to a method and device for splicing multiple images. Background technique [0002] In application fields such as video surveillance and video conferencing, the image signals of different resolutions of multiple source videos are often reduced and processed, and the effect of multi-picture is presented to the user on the same display terminal, so as to provide users with maximum information. quantity. For example, in a video surveillance system, it is often necessary to splice the signals of multiple cameras into various multi-pictures, such as 4 pictures, 9 pictures, 12 pictures, etc., and then display them on a monitor. [0003] In order to complete the splicing of multiple screens, there are two common ways: one is to complete it through software; the other is to use an application-specific integrated circuit (ASIC, Application Specific Integrated Circuit) architecture, ...

AI Technical Summary

Problems solved by technology

[0004] The software-based multi-screen splicing technology is more flexible, but the disadvantage is that the bandwidth is relatively small. When there are many video sources involved in splicing, it will consume more CPU resources.

Due to the relatively stable performance of ASIC, the ASIC-based multi-screen splicing solution has the advantages of short development cycle and low risk; however, ASIC manufacturers generally adopt redundant design methods in order to maximize the target market. In terms of specific needs, the flexibility is poor, and a separate memory space is provided for each multi-screen splicing method, which wastes storage resources

[0005] To sum up, the existing multi-screen splicing technology has poor flexibility and wastes storage resources.

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