An Improved Algorithm for Content Based Trademark Image Retrieval
Dan Wei · Jisuanji gongcheng · 2006
The traditional algorithm which combined wavelet module maxima and invariant moment is an effective algorithm for content based trademark image retrieval.Aiming at the inaccurate orientation and weak antinoise ability in the edge for the invariant moment calculation,This paper uses the method to track the wavelet transform amplitude maxima to mend it.Searching by the images,it found the modified algorithm remarkably improve the recall ratio and the precision ratio when the image have moved,circumrotated,twisted.