Asynchronous image real-time overlay controller and its overlay method

Abstract

A real time superposition controller for asynchronous images is disclosed and comprises an input circuit, a superposition control unit, a storage device and an output circuit, wherein the superposition control unit is connected with the input circuit, the output circuit and the storage device. According to the real time superposition controller, a hardware processing structure is adopted, strong application directivity is realized, and all video signals can be displayed in real time in a high-quality manner and a superposed manner; a superposed display control mode is employed, and signal quantities and types can be configured based on needs; a layered controllable structure is adopted, and therefore a primary-secondary relation of displayed images can be determined based on actual needs; the real time superposition controller is characterized by flexible application, simple-to-realize property, reliable functions and the like.

Description

technical field [0001] The invention relates to the technical field of image processing, in particular to an asynchronous image real-time superimposition controller and a superposition method thereof. Background technique [0002] With the development of science and technology, video overlay technology has been widely used. Picture-in-picture in TV products, PC graphics card supporting multiple displays and some professional video overlay software technologies have solved many problems for us in real life. , but these stacking technologies are far from meeting the actual needs of many field applications. [0003] For example, an integrated combat display and control platform that needs to realize multi-channel video input superposition, in which the input video signals are diverse, including: PAL-D format signal output by monitoring equipment, VGA video signal from platform equipment, LVDS signal output from radar equipment, etc. Selectively overlay and display all its sign...

AI Technical Summary

Problems solved by technology

[0005] Chinese patent, CN 204883833 U (disclosure time: December 16, 2015) provides an image processing device, including an LCD display, a graphic image overlay, a first video encoder, a TV, a single-chip microcomputer, a host interface, a second video Decoder, FPGA, FPGA configuration chip and frame memory, FPGA configuration chip is connected to FPGA, FPGA is connected to frame memory, FPGA is also connected to the first video encoder, and the first video encoder is respectively connected to graphic image superimposed device and TV, The graphic image superimposer is connected with the LCD display, and the single-chip microcomputer is connected with the second video decoder, the host interface, the first video encoder and the FPGA; this technical solution has the ability of image superimposition processing, but it cannot solve the problem of mixing and superimposing between different video signals The problem

[0006] Chinese patent, CN 103051904 A (disclosure time: April 17, 2013) provides a digital halftone video processing system and method based on floating pixels, wherein the system includes a CCD sensor, an analog-to-digital signal conversion chip and a display device; An FPGA image processing unit is provided; a CCD sensor, an analog-to-digital signal conversion chip, an FPGA image processing unit and a display device are sequentially connected; the image processing unit includes an input data processing module, a system control module, a dithering template module with floating pixels, Image data comparison module and image information correction module; this technical solution is mainly suitable for image enhancement processing. Although it also has image superposition processing capabilities, it also cannot solve the problem of mixing and superimposing between different video signals

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