Image retrieval and filter apparatus based on image wavelet feature and method thereof

Abstract

The invention provides an image retrieval and filter apparatus based on wavelet feature and a method thereof, relating to an image retrieval and filter method, in particular to a fast image retrieval and filter apparatus which is based on wavelet feature and has stronger invariability on operations such as rotating, noise increasing, filtering and scaling changing and the method thereof. The apparatus comprises a feature extracting unit and a match marking unit, wherein the feature extracting unit is used for carrying out tree-type structure scanning on the wavelet transformation coefficient after thresholding to effectively extracting the feature of the image, and the match marking unit is used for evaluating the matching degree of the image feature to be retrieved and the image feature in the store and outputting the marking of the matching degree. The invention realizes the aim of fastness, simplicity and unchanged rotation.

Description

technical field [0001] The invention relates to a device and method for image retrieval and filtering, in particular to a fast image retrieval and filtering device and method based on wavelet feature-based operations such as anti-rotation, noise addition, filtering, and scale change. Background technique [0002] In recent years, with the continuous development of Internet technology and multimedia technology, massive images and video files have been widely disseminated through the Internet and other electronic media. The emergence of this new situation raises new questions: First, for the government and some companies, how to effectively monitor and filter these multimedia contents is an urgent and important issue related to national information security and enterprise information security. task; secondly, for the vast number of Internet users, can a fast and accurate retrieval technology be provided, so that users can retrieve the images they need in the vast network like ...

AI Technical Summary

Problems solved by technology

The emergence of this new situation raises new questions: First, for the government and some companies, how to effectively monitor and filter these multimedia contents is an urgent and important issue related to national information security and enterprise information security. task; secondly, for the vast number of Internet users, can a fast and accurate retrieval technology be provided, so that users can retrieve the images they need in the vast network like searching for text; finally, for multimedia file copyright For the owner, can it provide a fast near duplication file retrieval strategy, so as to realize the effective protection of copyright and the rapid discovery of infringement?

[0006] However, because the coefficients of the Haar transform change with the rotation of the image, the method proposed by ImgSeek cannot achieve the rotation invariance of the feature; moreover, the image feature form proposed by Imgseek is more complicated, which is not conducive to the storage and matching of features. There is still a lot of room for improvement in storage space

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