Motion estimation device and method

Abstract

The invention provides a motion estimation device. The motion estimation device comprises an image acquisition unit, a down sampling unit, a motion detection and tracking unit and a motion searching unit, wherein the image acquisition unit acquires frame images; the down sampling unit performs down sampling on the frame images; the motion detection and tracking unit performs motion detection and tracking on a down-sampled current frame so as to acquire a motion target, determines a corresponding motion target of the current macro block of the original current frame on the current frame after the down sampling and a motion vector of the corresponding motion target, and performs up sampling on the motion vector of the corresponding motion target; and the motion searching unit determines an initial position in an original reference frame according to the motion vector of the corresponding motion target after the up sampling and the position of the current macro block of the original current frame, sets a search box in the original reference frame based on the initial position, and searches a search box for a block matched with the current macro block of the original current frame, wherein the position difference between the searched matching block and the current macro block of the original current frame is used as the motion vector of the current macro block of the original current frame.

Description

【Technical field】 [0001] The invention relates to the field of video image transmission, in particular to a device and method for motion estimation in video images. 【Background technique】 [0002] With the popularity of digital technology applications, video applications are becoming more and more extensive, especially video surveillance. In the process of video monitoring, the ingested video data must be transmitted to the monitoring end in real time, so the video data is generally encoded and compressed at the camera end to facilitate transmission. If the video data is too large, it will be lost during the video transmission process. Increase the burden of the channel, so in the process of video coding, it is necessary to fully consider how to maximize the compression coding of video data. [0003] Currently, block-based motion estimation and motion compensation are usually required in video coding to compress the current video image. The block-based motion estimation ta...

AI Technical Summary

Problems solved by technology

[0004] However, in object motion, blocks belonging to the same object usually have the same or similar motion rules. When the object moves fast, it is difficult to find a matching block if the search window is limited.

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