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An automatic recognition method of infrared image landing gear

An infrared image and automatic recognition technology, which is applied in image analysis, image enhancement, scene recognition, etc., can solve the problems of difficult real-time hardware implementation and large amount of calculation, and achieve easy real-time implementation, small algorithm calculation amount, and high accuracy rate Effect

Active Publication Date: 2019-11-15
NANJING LES ELECTRONICS EQUIP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

(3) Automatic recognition of the landing gear state for the extracted landing gear area; (4) Most of the existing target recognition methods have a large amount of computation and are not easy to implement in real time with hardware

Method used

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  • An automatic recognition method of infrared image landing gear
  • An automatic recognition method of infrared image landing gear
  • An automatic recognition method of infrared image landing gear

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Experimental program
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Effect test

Embodiment

[0076] The focal plane array size of the infrared thermal imager is 640×512, and the working frame rate is 50 frames per second. The image processing platform adopts DSP+FPGA architecture, and the infrared image landing gear automatic recognition technology is implemented in the DSP processor to meet the needs of real-time processing, such as figure 1 As shown, the specific implementation steps are as follows:

[0077] (1) Obtain the input infrared image I;

[0078] The input image I of the DSP processor is an 8-bit digital image, and the image size is 640×512.

[0079] (2) statistics I histogram His, calculates the segmentation threshold Th of foreground and background;

[0080] The histogram His is expressed as His(k){k=0...255}, and the threshold T is set 1 =120, the window is 1×N and N=10, and the threshold Th=130 can be obtained by calculating according to Count / N>0.8.

[0081] (3) Image I is binarized using threshold Th=130 to obtain binary image Bi Img, such as Fi...

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Abstract

The invention discloses an infrared image landing gear automatic recognition method, comprising the following steps: Step 1, input infrared image I; Step 2, count the histogram Histogram of infrared image I, and calculate the segmentation threshold Th of foreground and background; Step 3, Use the segmentation threshold Th to binarize the infrared image I to obtain the binary image Bi Img; step 4, locate the position Pos of the two engines of the aircraft 1 and Pos 2 ; Step 5, calculate the front and rear landing gear distribution areas, respectively Area 1 、Area 2 and Area 3 ; Step 6, calculate the characteristic parameter F of the landing gear in the distribution area 1 , F 2 and F 3 ; Step 7, according to the characteristic parameter F 1 , F 2 and F 3 Complete landing gear identification. The landing gear automatic recognition technology involved in the present invention has high recognition accuracy, small calculation amount, and is easy to be realized by hardware in real time.

Description

technical field [0001] The invention relates to an infrared image landing gear automatic recognition method. Background technique [0002] The full opening and locking of the landing gear is a necessary prerequisite for the safe landing of the aircraft. At present, although military and civilian aircraft are equipped with machinery, light prompt signs and instrument indications for the state of the landing gear, some aircraft also have monitoring equipment such as cameras outside the cabin to observe the state of the landing gear. However, during the landing process of the aircraft, it is often necessary to set up observers on the ground to manually confirm the opening state of the landing gear to ensure absolute safety. Due to the influence of many external factors such as weather, time period, and light intensity, manual observation may not be able to provide timely and effective indication information of the landing gear status in extreme cases to meet the needs of rapid...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06K9/00G06T7/11G06T7/136G06T7/194G06T7/70
CPCG06T2207/10048G06T2200/28G06V20/13
Inventor 白俊奇刘文王寿峰常传文章林陈宇寒朱伟刘文松苗锋郑浩陈福玉龙超
Owner NANJING LES ELECTRONICS EQUIP CO LTD