Gabor filter background texture inhibition-based car logo detection method

A technology for background texture, vehicle logo detection, applied in instruments, character and pattern recognition, computer parts and other directions, can solve the problems of being easily disturbed by light changes, low detection rate, etc. Robust effect

Active Publication Date: 2017-05-31
SOUTHEAST UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing car logo positioning method is not mature enough, there are problems such as low detection ra

Method used

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  • Gabor filter background texture inhibition-based car logo detection method
  • Gabor filter background texture inhibition-based car logo detection method
  • Gabor filter background texture inhibition-based car logo detection method

Examples

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Example Embodiment

[0019] Such as figure 1 As shown, the vehicle logo detection method based on Gabor filter background texture suppression in this embodiment includes:

[0020] (1) Based on the SIFT operator for the vehicle image with a certain tilt angle, the vehicle symmetry axis detection and tilt correction are performed.

[0021] This step specifically includes:

[0022] (1-1) Obtain the point vector of each feature point of the vehicle image, where the point vector defining the feature point i is x i ,y i Represents the coordinates of the point, Indicates the direction, s i Represents scale information, i=1,...,n, n is the total number of feature points;

[0023] (1-2) The direction of the feature point After normalization, the corresponding feature descriptor k is obtained i , I=1,...,n, and generate SIFT feature point vectors of preset dimensions from the feature descriptors of all points;

[0024] (1-3) By directly modifying the feature descriptor k i Generate mirror m i , And then generate p...

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Abstract

The invention discloses a Gabor filter background texture inhibition-based car logo detection method. The method comprises the following steps of firstly, performing oblique correction preprocessing on an image; secondly, performing license plate detection in the preprocessed image to obtain a license plate region; thirdly, locating a license plate according to a position relationship between the license plate and a car logo based on priori knowledge, and obtaining a car logo rough locating region containing a car logo pattern; 4, performing Gabor filtering on the car logo rough locating region, inhibiting textures of a cooling net around the car logo, and highlighting a car logo region; 5, performing Gaussian filtering and mathematical morphological closing operation; and 6, selecting a threshold for thresholding a grayscale image, and framing and detecting a target region, thereby realizing car log fine locating. The car logo detection method is short in detection time and high in detection rate.

Description

technical field [0001] The invention relates to a vehicle logo detection method, in particular to a vehicle logo detection method based on Gabor filter background texture suppression. Background technique [0002] With the rapid growth of society and economy, China's automobile consumption demand is increasingly strong, and the number of automobiles continues to increase, which also brings traffic problems such as traffic hit-and-run, vehicle theft and so on. In order to determine illegal and illegal vehicles, what is generally used at present is to identify the license plate of the car. However, in recent years, the emergence of phenomena such as decked plates, inverted plates, license plate wear and license plate occlusion, makes it unreliable to determine the car only by recognizing the license plate. The car logo is a key image that contains the information of the model and the manufacturer, and is an important basis for car classification and identification. If the ca...

Claims

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Application Information

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IPC IPC(8): G06K9/32G06K9/54G06K9/62
CPCG06V10/245G06V10/20G06F18/214
Inventor 路小波陈聪孙权
Owner SOUTHEAST UNIV
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