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Method and device for detecting target object from video and electronic equipment

A technology for detecting targets and target objects, which is applied in the field of video processing and can solve problems such as the inability to segment the foreground area

Pending Publication Date: 2021-09-14
ALIBABA GRP HLDG LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in a dynamic live broadcast scene, especially in an outdoor live broadcast scene, since the background is dynamically changing, it is impossible to segment the foreground area by simple algorithms such as background subtraction

Method used

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  • Method and device for detecting target object from video and electronic equipment
  • Method and device for detecting target object from video and electronic equipment
  • Method and device for detecting target object from video and electronic equipment

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Embodiment Construction

[0051] Hereinafter, exemplary embodiments according to the present application will be described in detail with reference to the accompanying drawings. Apparently, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments of the present application. It should be understood that the present application is not limited by the exemplary embodiments described here.

[0052] Application overview

[0053] In the usual video object segmentation algorithm, first estimate the optical flow between the current image and the previous frame image, use the optical flow to map the previous frame object area to the current image, and finally use the image object segmentation algorithm to optimize the precise edge of the object .

[0054] However, optical flow calculation not only takes a long time, but also is not stable enough, and it is difficult to obtain accurate optical flow for regions lacking texture. Moreover, this method...

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Abstract

The invention discloses a method and device for detecting a target object from a video and electronic equipment. The method for detecting the target object from the video comprises the following steps: acquiring a current feature map of a current frame and a previous feature map of a previous frame of the video; weighting the current feature map based on the correlation between the current feature map and the previous feature map to obtain an attention map; fusing the attention map and the current feature map to obtain a final feature map; and detecting a target object from the current frame based on the final feature map. Therefore, the precision of object detection is improved.

Description

technical field [0001] The present application relates to the technical field of video processing, and more specifically, to a method, device and electronic equipment for detecting a target object from a video. Background technique [0002] In the video production process, it is often necessary to remove the background area of ​​the current video and replace it with other scenes. The core algorithm here is the video object segmentation algorithm, which is used to segment the foreground area of ​​interest in the video, and then a simple image restoration algorithm can be used to synthesize the video under the new background. [0003] Changing the video background is used in many scenarios. For example, there is often a need to change the background in live broadcast scenarios. However, in a dynamic live broadcast scene, especially in an outdoor live broadcast scene, since the background is dynamically changing, it is impossible to segment the foreground area by simple algori...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T7/246G06T7/215
CPCG06T7/246G06T7/215G06T2207/10016
Inventor 刘晓宇叶挺孟任海兵
Owner ALIBABA GRP HLDG LTD