Logo detection method based on spatial connected domain prepositioning

Abstract

The invention discloses a logo detection method based on spatial connected domain prepositioning. The logo detection method disclosed by the invention comprises the following steps: creating a logo picture sample library comprising multiple logo pictures; creating spatial connected domain descriptor (SCCD) characteristics for the logo pictures in the logo picture sample library; for a test picture containing a target logo, creating connected domain descriptor (CCD) characteristics of the test picture; acquiring logo prepositioning regions (LPRs) in the test picture by utilizing the SCCD characteristics of the logo pictures in the logo picture sample library; and matching the LPRs with the logo pictures in the logo picture data library by utilizing the characteristics which are created based on logo colour and shape information, wherein the successfully matched logo prepositioning region is namely a finally detected logo. The logo detection method disclosed by the invention fully directs at the characteristics of a logo, speed and accuracy of logo detection and positioning identification are further improved, and detection on the logo, which is influenced by scale variation, visual angle transformation, illumination, overlap and background interference, can have good effect.

Description

technical field [0001] The invention relates to the technical field of target detection and recognition, in particular to a trademark detection method based on spatial connected domain pre-positioning, which can be used for fast trademark detection, trademark retrieval, recognition and monitoring. Background technique [0002] Trademark detection and recognition is one of the challenging tasks in the field of object detection and recognition. How to accurately detect, locate and recognize a trademark under the influence of scale transformation, perspective transformation, illumination, occlusion, background interference, etc. is a challenging task. At present, various information media have developed rapidly, such as television, radio, and the Internet. These information media are filled with a large amount of advertising information every day, and now there are a large number of trademarks, how to effectively manage and monitor these advertising information to ensure the s...

AI Technical Summary

Problems solved by technology

[0003] Most target detection and recognition use multi-scale sliding window search to search for targets. Traditional trademark detection also uses this method. This method is just a simple traversal search, so it brings a lot of useless calculations, and with the increase of the image dimension The detection time becomes longer, which is not conducive to the application of real-time detection

Some existing technologies also use the method of target training, but for trademarks, which may have tens of thousands of types of pictures, if each picture is trained, a large number of pictures are required, which is very unfavorable for practical applications

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