Vehicle logo detection method and device

A car logo detection and car logo technology, applied in the field of communication, can solve the problem of low accuracy of car logos, and achieve the effect of improving the accuracy rate

Inactive Publication Date: 2016-04-20
信帧机器人技术(北京)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Aiming at the relatively low accuracy of vehicle logo detection in the related art, the present invention provides a vehicle logo detection method and device to at least solve this problem

Method used

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  • Vehicle logo detection method and device
  • Vehicle logo detection method and device
  • Vehicle logo detection method and device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] This preferred embodiment provides a method for segmenting and locating vehicle logos based on morphology, which includes the following steps S202 to S206.

[0039] Step S202: Perform morphological edge detection on the grayscale image, and then use an area with relatively high edge density as a candidate license plate area.

[0040] Step S204: Carry out license plate preprocessing on the area identified as a license plate, and then use the license plate information to roughly locate the vehicle logo area, including license plate positioning, rough positioning of the vehicle logo area, binarization, horizontal correction, and vertical correction.

[0041] Step S206: Use the features of morphology and watershed to detect the vehicle logo in the coarsely positioned vehicle logo area with the background, so as to realize the automatic positioning and segmentation of the vehicle logo.

[0042]Preferably, the above-mentioned car logo preprocessing method also includes: using...

Embodiment 2

[0046] This preferred embodiment provides an effective method for segmenting and locating the vehicle logo above the license plate. Firstly, the approximate area of ​​the vehicle logo is identified according to the license plate positioning information stage, and then in the fine positioning stage, the segmentation process is carried out according to the characteristics of the vehicle logo respectively, and the final segmentation results.

[0047] The method includes steps S302 to S306 as follows.

[0048] Step S302: Coarse positioning of the vehicle logo.

[0049] In this step, edge detection or machine learning algorithms are used to locate the license plate of the input image, and then roughly locate the information area of ​​the vehicle logo according to the license plate positioning information.

[0050] Step S304: preprocessing of the rough positioning area of ​​the vehicle logo: performing horizontal correction on the rough positioning area of ​​the vehicle logo using ...

Embodiment 3

[0060] This preferred embodiment provides a morphological vehicle logo segmentation method, Figure 4 It is a flow chart of morphological vehicle logo segmentation according to an embodiment of the present invention, such as Figure 4 As shown, the method includes the following steps S402 to S414.

[0061] Step S402: Input a car image.

[0062] Step S404: license plate location. This step can adopt the implementation modes in the above preferred embodiments.

[0063] Step S406: Coarse positioning of the vehicle logo.

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Abstract

The invention discloses an automobile logo detection method and device. The method comprises the steps that an area with edge density which meets preset requirements after edge segmentation operation on a gray image of an automobile is determined as a license plate area; an automobile logo area is positioned by using license plate information and the license plate area; and in the automobile logo area, automobile logo detection is conducted through edge detection and watershed segmentation. Through the automobile logo detection method and device, the automobile logo detection accuracy is improved.

Description

technical field [0001] The present invention relates to the communication field, in particular to a vehicle logo detection method and device. Background technique [0002] With the development of social economy and the increase of vehicles, it is inevitable to manage vehicles through computer information and intelligence. Vehicle logo positioning technology is an important part of vehicle logo recognition in intelligent transportation. Common car logos are generally located above the license plate. The topological relationship between the license plate and the car logo is used to determine the approximate area of ​​the car logo; Divided into round, oval and square. Since some background and front interference objects will affect the segmentation of vehicle logos, it is difficult to completely eliminate these interference objects. The current processing technology can only recognize license plates and large, medium, and small vehicles, but cannot identify specific models. T...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06K9/32G06K9/54
Inventor 刘忠轩杨宇
Owner 信帧机器人技术(北京)有限公司
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