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Method for detecting and identifying station logo

A technology for station logo and detection, which is applied in character and pattern recognition, image analysis, instruments, etc., can solve the problems of confusion of the same station logo and low time efficiency, and achieve the effect of improving accuracy and time efficiency

Inactive Publication Date: 2011-01-19
PEKING UNIV
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  • Summary
  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

The method of global edge matching is difficult to effectively distinguish similar station logos, because the similarity of the same station logo changes within a range under the influence of noise, and the approximate station logo often has a high global similarity, which is easy to be confused with the same station logo
In addition, the global edge matching method still needs to complete the matching of all edge points in the sliding window when the local mismatch has been proved, and the time efficiency is low

Method used

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  • Method for detecting and identifying station logo
  • Method for detecting and identifying station logo
  • Method for detecting and identifying station logo

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Embodiment Construction

[0019] In order to make the purpose, technical solution and advantages of the present invention more clear, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0020] In this embodiment, the station logo template is first obtained according to a given example video frame of the station logo, then the edge of the video frame to be detected and recognized is extracted, and finally the results of the station logo detection and recognition are obtained through block matching of the sliding window. Include the following steps:

[0021] Step 1. Given a sample video frame of the station logo, perform edge detection and filtering on it, and further locate and segment the station logo area, divide the station logo area into blocks, and obtain the station logo template.

[0022] In this embodiment, edge detection is implemented using a Canny operator. Edge filtering is realized by manually removing the non-stand...

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PUM

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Abstract

The invention provides a method for detecting and identifying a station logo. The method comprises the following steps of: 1) setting a station logo example video frame, performing edge detection and filtering on the station logo example video frame, further positioning and segmenting a station logo area, and partitioning the station logo area to obtain a station logo template; 2) setting a video frame to be detected and identified, performing edge detection on the video frame to obtain an edge image of the video frame to be detected and identified; and 3) acquiring a station logo detection and identification result by a sliding window searching and block matching method according to the station logo template and the edge image of the video frame to be detected and identified. Compared with the conventional global matching-based method, the method of the invention can achieve higher station logo detection and identification accuracy rate and time efficiency.

Description

technical field [0001] The invention relates to the field of pattern recognition of images, in particular to a method for detecting and recognizing station logos. Background technique [0002] A TV station logo is a symbol of a TV station, which contains important semantic information such as the station name, program orientation, etc., and is one of the important semantic sources for video analysis, understanding and retrieval. With the rapid development of TV technology, there are hundreds of TV programs at all levels. Manually monitor TV signals in real time or select specific TV programs to record, etc., the work intensity is high, the work efficiency is low, and there will inevitably be mistakes. Taiwan logo detection and recognition technology is the key to overcome the above problems, and has very important research and application value. [0003] Template matching is the most intuitive algorithm for logo detection and recognition. In 2007, Huang Chaoyao and Lin Ji...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K9/62G06T7/00
Inventor 李浩彭宇新
Owner PEKING UNIV
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