Title:
VEHICLE BODY DOOR SLOT DETECTION METHOD BASED ON EDGE DETECTION
Document Type and Number:
WIPO Patent Application WO/2024/011851
Kind Code:
A1
Abstract:
A vehicle body door slot detection method based on edge detection. The method comprises: 1) building a vehicle body door slot detection device, and detecting a vehicle body door slot image; 2) performing filtering processing on the image; 3) smoothing the filtered image by using a first-order partial derivative of a Gaussian function, and then calculating the gradient and direction of the image by using a finite difference of the first-order partial derivative, so as to form a gradient image; 4) performing non-maximum suppression on a gradient amplitude in the gradient image, only retaining a local maximum value point, and obtaining discrete points of an edge contour gradient image; 5) giving a low threshold value and a high threshold value, recording points with a gradient value greater than the high threshold value as strong edge pixels to serve as anchor points in the image, setting pixels to be zero for points with a gradient value less than the low threshold value, and connecting the anchor points to form an edge image; and 6) extracting feature points of the edge image, matching a laser-marked image window, finding a position perpendicular to a slot, calculating a Manhattan distance at the window, and acquiring the minimum value of the width of the door slot. In the present invention, the robustness and accuracy of a detection model are improved by means of edge detection and a Manhattan distance.
Inventors:
LU XIAOJIA (CN)
ZHOU MINHAO (CN)
YU RU (CN)
ZHOU MINHAO (CN)
YU RU (CN)
Application Number:
PCT/CN2022/141041
Publication Date:
January 18, 2024
Filing Date:
December 22, 2022
Export Citation:
Assignee:
NANJING SIFEIJIE SOFTWARE TECH CO LTD (CN)
International Classes:
G06V10/75; G06T5/00
Foreign References:
| CN115187552A | 2022-10-14 | |||
| CN113850786A | 2021-12-28 | |||
| CN113838077A | 2021-12-24 | |||
| CN114399522A | 2022-04-26 | |||
| US20090238488A1 | 2009-09-24 | |||
| CN108470347A | 2018-08-31 |
Other References:
LI SHIXIONG; CAO GUANGZHONG; LI QING;PENG YEPING; LV JIEYIN: "Research on Anchor Points based Edge Detection Optimization", JOURNAL OF ELECTRONIC MEASUREMENT AND INSTRUMENT, vol. 32, no. 11, 15 November 2018 (2018-11-15), pages 9 - 16, XP009551927, ISSN: 1000-7105
KAIMING HE, JIAN SUN, XIAOOU TANG: "Guided Image Filtering", IEEE TRANSACTIONS ON PATTERN ANALYSIS AND MACHINE INTELLIGENCE, IEEE COMPUTER SOCIETY., USA, vol. 35, no. 6, 1 June 2013 (2013-06-01), USA , pages 1397 - 1409, XP055256301, ISSN: 0162-8828, DOI: 10.1109/TPAMI.2012.213
KAIMING HE, JIAN SUN, XIAOOU TANG: "Guided Image Filtering", IEEE TRANSACTIONS ON PATTERN ANALYSIS AND MACHINE INTELLIGENCE, IEEE COMPUTER SOCIETY., USA, vol. 35, no. 6, 1 June 2013 (2013-06-01), USA , pages 1397 - 1409, XP055256301, ISSN: 0162-8828, DOI: 10.1109/TPAMI.2012.213
Attorney, Agent or Firm:
BEIJING GAOWO LAW FIRM (CN)
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