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Method and apparatus for positioning vehicle based on characteristics

A vehicle positioning and vehicle technology, which is applied in the direction of measuring devices, optical devices, instruments, etc., can solve the problems of undetectable vehicle bottom shadows, inaccurate calculation of symmetry axes, and unavoidable background vehicle image incompleteness, etc.

Inactive Publication Date: 2011-10-26
NEUSOFT CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, only contour symmetry, grayscale symmetry, horizontal edge symmetry, and vertical edge symmetry are used, and horizontal edge symmetry and vertical edge symmetry are only one type of contour symmetry in principle. Therefore, backgrounds, lighting conditions, and vehicles cannot be avoided. The effect of incomplete images
[0007] In addition, when calculating the axis of symmetry in the prior art, the image area involved in the calculation of the axis of symmetry is the entire ROI
Therefore, there are the following problems: the amount of calculation is large, and it is easily affected by some backgrounds, which makes the calculation of the symmetry axis inaccurate
However, due to the position of the sun (or other light sources), the height of the camera installation, and the slope of the road, sometimes the shadow of the vehicle bottom cannot be detected on the image, such as light leakage and backlighting at the bottom of the vehicle. At this time, the lower edge of the vehicle cannot be determined.

Method used

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  • Method and apparatus for positioning vehicle based on characteristics
  • Method and apparatus for positioning vehicle based on characteristics
  • Method and apparatus for positioning vehicle based on characteristics

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Experimental program
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Effect test

Embodiment approach 1

[0042] Below, refer to Figure 3-7 The vehicle positioning method according to Embodiment 1 of the present invention will be described.

[0043] image 3 It is a flowchart showing main steps of locating a vehicle in the vehicle locating method according to Embodiment 1 of the present invention. Below, refer to image 3 The main steps of positioning the vehicle in the present invention are described in detail.

[0044]

[0045] In step S1, using the contour symmetry, grayscale symmetry and S-component symmetry features of the HSV color space, respectively calculate the symmetry axis of the vehicle in the height direction, that is, the vertical direction, that is, the contour symmetry axis, gray-scale symmetry axis and S-component symmetry axis as a candidate axis of symmetry for the vehicle.

[0046] Since the method of calculating the contour symmetry axis and the gray symmetry axis by using the contour symmetry and gray scale symmetry is a well-known technique in the ar...

Embodiment approach 2

[0103] Below, refer to Figure 8 A vehicle positioning device according to Embodiment 2 of the present invention will be described.

[0104] Figure 8 It is a figure which shows the main structure of the positioning vehicle apparatus 100 in Embodiment 2 of this invention. Below, refer to Figure 8 The main configuration of the vehicle positioning device 100 will be described in detail.

[0105] like Figure 8 As shown, the vehicle positioning device 100 has: a symmetry axis determination unit 101 , a left and right edge determination unit 102 , a top and bottom edge determination unit 103 and a positioning unit 104 .

[0106] Figure 8 The configuration of the vehicle positioning device shown in is just an example, and of course the vehicle positioning device of the present invention is not limited thereto, and it can be changed according to circumstances. E.g, Figure 8 There is a symmetry axis determination unit, a left and right edge determination unit, and a top and...

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Abstract

A vehicle positioning method based on vehicle character includes calculating one or multiple symmetric axis of vehicle at height direction, calculating one pair or multiple pair of left-right edges of vehicle, utilizing projection to calculate top-bottom edges vehicle, utilizing grey scale to calculate bottom edge of vehicle, utilizing color to calculate top edge of vehicle and utilizing various confirmed edges integrally to confirm position of vehicle in image.

Description

technical field [0001] The present invention relates to a vehicle positioning method and device for determining the position of a vehicle in a machine vision-based vehicle recognition system, and in particular to accurately determining the position of a vehicle in an ROI based on vehicle features extracted from an image region that may contain potential vehicles, that is, the ROI Vehicle positioning method and device. Background technique [0002] In the vehicle recognition system based on machine vision, the original image captured by the camera installed on the own vehicle (hereinafter referred to as the own vehicle) or other moving / fixed objects is subjected to segmentation and other processing, which may contain potential The image area of ​​the vehicle is the so-called ROI (Region Of Interest). Accurately locating the position of the vehicle in the ROI helps to improve the vehicle recognition rate of the system. In particular, accurately locating the position of the l...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01C11/00G01C21/26G01B11/00G08G1/16
Inventor 刘威郑烨
Owner NEUSOFT CORP
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