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Dynamic background matching method for moving target detection

A dynamic background and matching method technology, applied in the field of image processing, can solve problems such as unsatisfactory and low efficiency in occasions with complicated steps and very high real-time requirements, and achieve the effect of simplifying background modeling algorithms and high background matching accuracy.

Active Publication Date: 2021-05-14
SOUTHWEAT UNIV OF SCI & TECH
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  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Most of the existing dynamic background modeling and matching algorithms are relatively complex. For example, the widely used mixed Gaussian background modeling requires a lot of calculations on the image, and the efficiency is low. It is not ideal in some occasions with very high real-time requirements.
The traditional background matching method generally needs to extract the corner points, and then match the corner points on the two frames of images, and filter out the unreasonable matching points
This method is cumbersome and time-consuming, and it is difficult to meet the real-time requirements

Method used

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  • Dynamic background matching method for moving target detection
  • Dynamic background matching method for moving target detection
  • Dynamic background matching method for moving target detection

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Experimental program
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Embodiment 1

[0042] It only needs to perform an overall translation traversal operation on the five matching area blocks to find the best matching offset. Figure 5 (a) and (b) are two images separated by 3 frames, Figure 5 (c) is a schematic diagram of superimposing the background at the same position after being translated by using 5 matching area blocks for translation matching calculation.

[0043] In this method, 4+1 image areas are used as matching blocks, among which 4 area matching blocks are close to the four corners of the image, and 1 area matching block is randomly selected. In order to ensure that the selected matching block contains certain texture information, and to avoid directly selecting the position of the pixel block that may select a large area of ​​the same pixel, resulting in inaccurate background matching, edge detection is first performed on each frame of the processed image. Remove the outermost image that may move out of the field of view, and search for the f...

Embodiment 2

[0046] The image difference method mentioned in step S2 includes inter-frame difference and multi-frame difference multiplication method.

[0047] The steps of target detection in the step S2 are:

[0048] Select the current frame, the previous frame and the previous two frames of the image;

[0049] Match the background of the previous frame to the current frame, and perform inter-frame difference;

[0050] Match the background of the previous two frames to the previous frame, and perform inter-frame difference;

[0051] Multiply the two inter-frame difference results;

[0052] Perform linear filtering, morphological erosion and expansion, and size filtering to separate the target.

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Abstract

The invention discloses a dynamic background matching method for moving target detection, relates to the technical field of image processing, and aims to realize integral background matching by only adopting four matching blocks at four corners of an image and a random matching block to perform background matching and local image matching. On an occasion with relatively low hardware computing capability, simple target detection under a dynamic background can be realized by using the method provided by the invention. According to the dynamic background matching method for moving target detection provided by the invention, the moving target is detected by using an inter-frame difference method after background matching, and the target can be successfully and quickly detected under the condition that a camera shakes, rotates and tilts greatly. Matching is carried out by utilizing simple local region blocks, so that relatively high background matching accuracy is kept, and a background modeling algorithm is simplified.

Description

technical field [0001] The invention relates to the technical field of image processing, in particular to a dynamic background matching method for moving object detection. Background technique [0002] With the reduction of hardware costs such as cameras and the improvement of manufacturing processes, various applications based on video cameras have been widely developed. Most of these applications involve the detection, tracking and identification of targets. [0003] For most video images, the content in the image can be roughly divided into two parts, the background and the foreground. The background refers to an image that occupies most of the image, is far away from the camera, and is still or gradually changing. The relative positional relationship between objects in the background image is generally fixed. The foreground refers to the target object that is relatively close to the camera and has obvious relative motion and change with the background image. There is...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K9/00G06K9/54G06K9/62
CPCG06V40/20G06V10/20G06V10/759G06V10/751G06V2201/07G06F18/22
Inventor 胡荣春马娟郑克龙
Owner SOUTHWEAT UNIV OF SCI & TECH
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