Moving small target detection method under complex ground background

Abstract

The invention discloses a moving small target detection method under a complex ground background, and the method comprises the steps: extracting sparse optical flow points, and calculating a background motion estimation matrix; performing background motion compensation by using the motion estimation matrix to obtain a frame difference image; fusing multiple frames of frame differences before and after the frame difference graph to obtain a forward and backward motion history graph; performing threshold processing on the forward and backward motion history graph, and extracting a connected domain based on a region growing method to obtain a candidate motion target; carrying out data association on the multiple frames of candidate targets before and after to obtain a plurality of motion tracks; calculating a confidence coefficient score of each track according to the actual motion characteristics of the target; and according to the confidence coefficient of the track, removing and complementing the candidate targets to obtain a final small target detection result. According to the detection method provided by the invention, for the moving target detection problem of a complex background and a small-size target, candidate moving area extraction is carried out based on a historical graph, and multiple frames of moving information before and after fusion are fused, so that the comprehensiveness, accuracy and high precision of detection are guaranteed.

Description

technical field [0001] The invention belongs to the technical field of digital image detection, and more specifically, relates to a method for detecting small moving targets under complex ground backgrounds. Background technique [0002] The detection and precise strike of moving ground targets is one of the main tasks of the Air Force. Among them, moving ground targets (such as trains, cars, armored targets, etc.) have important military value, and need to be discovered as early as possible and focused on detection for subsequent tracking and targeting. and combat tasks. However, during the driving process, the ground moving target will enter the area with complex terrain and topography, which leads to the complex background of the image, making it difficult to accurately detect the ground moving target, especially when the platform is too high, too far away from the target and the target itself In the smaller case, the imaging size is larger and the target in the image wi...

AI Technical Summary

Problems solved by technology

[0012] Aiming at the defect that the existing detection methods are difficult to detect small targets, the present invention provides a detection method for moving small targets under complex ground backgrounds, thereby solving the problem that it is generally difficult in the prior art to achieve fast and accurate detection when the target size is small and the background is complex. Technical problems of small moving target detection

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