Infrared weak and small target detection method and device
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A technology of weak and small targets and detection methods, which is applied in the directions of instruments, calculations, characters and pattern recognition, etc., can solve the problem of few infrared weak and small target detection methods, and achieve the goal of improving computing power and processing speed, improving real-time performance, and increasing detection probability Effect
Active Publication Date: 2020-09-15
CALCULATION AERODYNAMICS INST CHINA AERODYNAMICS RES & DEV CENT
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[0004] At present, most of the infrared target detection methods are still developed from the visible light image processing technology, which solve some target detection problems from different angles, but there are still relatively few detection methods for small infrared targets.
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Embodiment 1
[0038] refer to figure 1 As shown, the present invention discloses a method for detecting small infrared targets. The method for detecting small infrared targets at least includes:
[0039] Step S1: an image preprocessing step, performing noise reduction and denoising processing on the infrared image of the current frame.
[0040]Preferably, the image preprocessing step in step S1 at least includes: calculating the statistical histogram of the infrared image of the current frame, and performing histogram transformation processing to filter out extreme noise points in the image; using a bilateral filtering algorithm to preprocess the infrared image , reduce the noise, enhance the signal-to-noise ratio of the target; and use the morphological filter to preprocess again.
[0041] Further, the histogram transformation process includes: after counting the histogram of the image, deleting points with 5% of the highest and lowest values. The purpose of removing strong interference ...
Embodiment 2
[0065] refer to Figure 4 As shown, on the basis of Embodiment 1, the present invention also discloses an infrared weak and small target detection device. The infrared dim and small target detection device at least includes a preprocessing module and a target detection module.
[0066] Preferably, the preprocessing module is configured to use histogram transformation, bilateral filtering and morphological filtering to suppress image noise and increase the target signal-to-noise ratio.
[0067] Preferably, the target detection module is configured to perform block parallel processing on the image, complete target segmentation, noise filtering, target information fusion processing, etc., realize detection of small and weak targets, and output target information.
[0068] Preferably, the main processor of the infrared weak and small target detection device is composed of one FPGA chip and two DSP chips, and the structural composition is shown in the attached Figure 4 . The pr...
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Abstract
The invention discloses an infrared weak and small target detection method. The method at least comprises the following steps: S1, an image preprocessing step; s2, an image blocking step: dividing theto-be-processed image into four overlapped sub-images, and performing parallel processing; s3, carrying out partition target segmentation on the sub-images, carrying out target segmentation on a large area by utilizing a maximum between-cluster variance method, carrying out target segmentation on a cell by utilizing a local signal-to-clutter ratio threshold segmentation method, and carrying out target fusion processing on two segmentation results; s4, carrying out noise filtering on the sub-images, wherein the noise filtering comprises scatter filtering and shape filtering; s5, calculating target information, wherein the target information at least comprises a target centroid position, a size and a signal-to-noise ratio; and S6, performing target fusion processing on the processing results of the four sub-images, deleting targets repeatedly detected in the overlapping region, and outputting target information. According to the method, an improved method is designed for infrared imagenoise suppression and small and weak target detection, the small and weak target detection probability can be effectively improved, and the false alarm rate is reduced.
Description
technical field [0001] The invention belongs to the technical field of image processing and target detection, and in particular relates to a method and device for detecting small and weak infrared targets. Background technique [0002] Infrared weak and small target detection is one of the most important performance indicators of infrared detection system. Affected by detectors, weather, environment and other factors, infrared targets have low contrast and low signal-to-noise ratio, and there are few features that can be used for target detection; environment and background interference are constantly changing, and long-distance targets are small in size and are often submerged in background noise. The above factors make the detection of small and weak infrared targets very difficult, which affects the performance of the infrared detection system. [0003] Researchers have proposed many methods for infrared target detection, which are generally divided into two methods: det...
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