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Digital video image fusion and superposition method

A video image and image fusion technology, applied in image communication, TV, color TV, etc., can solve the problems of poor adaptability, high power consumption, poor economic affordability, etc., achieve high precision, low delay, and improve read and write efficiency Effect

Active Publication Date: 2021-01-15
TIANJIN JINHANG COMP TECH RES INST
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Problems solved by technology

[0005] The technical problem to be solved by the present invention is how to provide a digital video image fusion and superposition method to solve the problems of poor adaptability and power consumption in the existing digital video image fusion and superposition. Larger, poor economic affordability and other issues

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Embodiment Construction

[0032] In order to make the purpose, content and advantages of the present invention clearer, the specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0033] In order to solve the above problems, the present invention provides a multi-channel digital video image fusion and superimposition module, which mainly completes the function of fusing and superimposing multiple digital video signals into one digital video signal. Take the fusion and superposition of two video images as an example. The fusion method performed by the module is mainly to fuse the two video images according to the relationship between the upper and lower layers. The image of the upper layer (hereinafter referred to as the video image of the background layer) covers the image of the lower layer (hereinafter referred to as the video image of the overlay layer), that is, the colored part of the backgr...

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Abstract

The invention relates to a digital video image fusion and superposition method, and belongs to the field of digital video images. According to the method, two paths of video images are fused accordingto a relation between an upper layer and a lower layer, a background layer video image covers a superposition layer video image, a DDR memory is used as a video frame cache, a read-write clock domainis separated, and a superposition layer video image clock domain control signal is written into the frame cache; a background layer video image clock domain control signal is used to cache and read out a video frame, a four-frame caching strategy is used to read and write a superimposed layer video image, and a virtual frame caching space strategy is used to indirectly achieve the fusion and superposition control of the superimposed layer video image and a background layer video image. The background layer video image in the output fused video image can be windowed at different positions to display the content of the superimposed layer video image. The fusion superposition method is low in power consumption, simple in logic implementation, high in precision, low in delay, flexible in configuration, autonomous and controllable, and fused video frame jitter is eliminated.

Description

technical field [0001] The invention belongs to the field of digital video images, and in particular relates to a fusion and superposition method of digital video images. Background technique [0002] Image fusion processing technology is widely used in scientific research, industrial and agricultural production, military technology, medical and health and other fields. The applications in the military field mainly include: coastal defense monitoring, TV tracking, target recognition, imaging guidance, etc. [0003] In the field of image fusion processing technology, it is often necessary to fuse and superimpose the collected video images on locally generated graphic information including date, time, coordinates, parameters, etc. to the video image. In previous video fusion and overlay systems, a dedicated character overlay chip is usually used to call the characters in the character library to achieve overlay, but the character overlay implemented in this way cannot provid...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N5/265H04N5/45
CPCH04N5/265H04N5/45
Inventor 孙文超刘康
Owner TIANJIN JINHANG COMP TECH RES INST
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