With the rapid development of computer, multimedia and network technology, as well as the emergence of a variety of compression techniques and high-capacity storage technology, vivid, expressive and informative multimedia resources gradually become important sources for people to obtain information. Meanwhile, the fast growth of mobile smart device technology provides a convenient way for the dissemination and sharing of information. Digitized images and videos have become important information recording media for people's daily life. Driven by the digital wave, the type of advertisements on the Internet has gradually changed from pure text to other multimedia sources such as image, flash and video. Trademarks are key information for these advertisements. Product information is published through trademarks to promote products and make them eye-catching, concise and easy to remember. As special symbols, trademarks can attract the attention of consumers and enhance their perception of goods. Products attract consumers and consumers choose goods by means of trademarks. The role of trademarks is obvious. Therefore, trademarks contain semantic information of images and videos and become an important clue to understand their content. However, with the increase of online advertisements, some illegal and false ads come into people's vision gradually. The embezzlement, interpolation and infringement of trademarks often occur, which have caused a negative impact on the economic development of the country and the legitimate interests of the people. Trademark detection and recognition in digital images becomes an urgent practical need. It will be effective protection of trademark registrants and consumers and of great significance for maintaining fair competition and guaranteeing healthy and rapid development of the network market. It can provide technical support for verification of the network market identification and online inspection. Many previous studies focus on trademark detection in the document image. The background of trademarks in these images is simple and with little interference. However, trademarks in the natural scene have deformation, occlusion, lighting and so on, which makes detection a greater challenge than that in the document images. This paper mainly aims at researching and resolving difficulties and problems related to trademark detection and recognition in natural scene images. The results of research work are applied to online advertis...
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