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Electronic image stabilization method based on improved block matching

An electronic image stabilization and block matching technology, which is applied in TV, electrical components, color TV, etc., can solve the problem of inappropriate selection of image block size, and achieve high reliability and strong stability

Inactive Publication Date: 2013-04-03
中国航天科工集团第二研究院二〇七所
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Problems solved by technology

[0004] The current block matching method is widely used in the field of video coding. The motion vector between image frames is small, and the detectable motion vector is about 7 pixels, while the motion vector between adjacent frames of the electronic image stabilization system can reach 40 pixels. The block matching algorithm is obviously helpless, and the image block size selection is not suitable for the electronic image stabilization algorithm

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[0044] The present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments.

[0045] An electronic image stabilization method based on improved block matching, comprising the following steps:

[0046] (1) Image preprocessing

[0047] The object of electronic image stabilization is a clear sequence of images. For a clear image, the instantaneous change of the environment light and shade will cause the change of the pixel intensity of the adjacent frame image, which will cause the stability of the block matching algorithm to decline, so it is necessary to detect the change of the image pixel intensity of the adjacent frame image caused by the instantaneous change of the environment light and shade and eliminate it. Specific steps are as follows:

[0048] (1.1) Detection of instantaneous changes in the brightness of the environment causes changes in the pixel intensity of adjacent frames of images

[0049] First find ...

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Abstract

The invention belongs to the technical field of photoelectricity, and particularly relates to an electronic image stabilization method based on improved block matching. The electronic image stabilization method comprises the steps of image pretreatment, establishment of a movement estimation model, establishment of matching criteria, searching of an image, matching image block selection of the searched image, and movement compensation, thus achieving image stabilization. The image stabilization accuracy of the method disclosed by the invention can reach a sub-pixel level, and meanwhile, the method is high in reliability, stability and adaptability and can be used for processing sequence images in any case with rotation, slight distortion, large-area change of backgrounds and drastic random jitter.

Description

technical field [0001] The invention belongs to the field of optoelectronic technology, in particular to an electronic image stabilization method based on improved block matching. Background technique [0002] Electronic image stabilization is a technology that uses a high-performance image signal processor to directly process the image signal input by the camera, uses the difference in image content between frames to estimate the motion vector of the camera platform, and performs motion compensation to stabilize the sequence image. Compared with traditional mechanical image stabilization and optical image stabilization, the advantages of electronic image stabilization are easy operation, less hardware, small size, high precision, strong flexibility, and high degree of intelligence. Once its key technology is broken through, a practical The device or product will be widely used in various imaging platforms, including vehicle-mounted, airborne and airborne imaging systems, an...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N5/21G06T7/20H04N5/14
Inventor 王宁明朱振福
Owner 中国航天科工集团第二研究院二〇七所