Spatial point target detection method based on focal plane modulation characteristics

Abstract

The invention provides a spatial point target detection method based on focal plane modulation characteristics. The method comprises the steps that (1) a window scans an infrared image, and direction number indexes, approximating circles, of the image in the window are obtained; (2) according to the direction number, whether the image contained in the window is a background or a target is preliminarily judged; (3) if the image contained in the window is the target, the circle index in the target shape in the window is calculated; (4) a detection threshold is calculated through a circle index; (5) the circle index is compared with the detection threshold, and whether the image contained in the window is the background or the target is judged. According to the spatial point target detection method based on the focal plane modulation characteristics, the modulation characteristics of a focal plane to space weak and small target infrared imaging approximating circles are utilized, target detection and simulation indication are conducted through target shape judgment, noise and the influences of strong points and blind points in the sensor focal plane can be effectively removed, and the method has the good performance for detection of space weak and small targets.

Description

technical field [0001] The invention belongs to the field of target detection, and relates to a point target detection method under a space background, in particular to a space point target detection method based on focal plane modulation characteristics. Background technique [0002] When the distance between the space target and the infrared sensor is long, the target appears as a point target with fewer pixels in the infrared image, and it is difficult to obtain the specific outline and shape only from the infrared image, and the signal-to-noise ratio is small. The detection of space points is of great significance for the discovery of space junk and space early warning. There are many methods in the field of space target detection, single-frame methods include top-hat filter method, surrounding center difference filter method, fractal filter method, etc. These methods have certain effects on space target detection, but these algorithms First, the background is predicted...

AI Technical Summary

Problems solved by technology

[0003] The present invention is aimed at the application of single-frame infrared point target detection in space, the program is relatively complicated, the real-time performance is poor, the modulation effect of the focal plane on the space point target is not fully considered, and the existing point target detection algorithm cannot effectively remove noise and the influence of strong and blind spots in the focal plane of the sensor, a space point target detection method based on the modulation characteristics of the focal plane is given, which is a new space infrared point target detection method to realize the spatial midpoint Efficient Detection of Targets

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