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The data sparsity and prediction quality are recognized as the key challenges in the existing recommender Systems. Most of the existing recommender systems depend on collaborating flitering (CF) method which mainly leverages the user-item rating matrix representing the relationship between users and items. However, the CF-based method sometimes fails to provide accurate information for predicting...
Edge is one of the most important image features, and it is the base of follow-up measurement and shape registration. In order to get better edge information, an edge detection method of block distance is proposed in this paper. Firstly, by calculating distance between the pixels within sub-block regions, the graph of Gaussian weighted distance is obtained. Comparing with the original figure, it not...
A new algorithm for nonlinear MSSSR (Mean-Shift Signal Scale Retinex) image enhancement is proposed. The idea first uses nonlinear enhancement on the grayscale image to global adjustment, then with the Mean-Shift filter estimates the illumination component, finally, enhances the image with MSSSR algorithm. Experimental results show that the method can able to effectively enhance the image and the...
In view of the problems of features in face recognition, a new face image feature extraction and recognition method----Fractal Locality Preserving Projections (FLPP) is proposed in this paper. FLPP first gets the high order statistic information by calculating the fractal codes of face images. Based on manifold learning theories, LPP takes into account the inter-class information, and extract the...
With the processing of CMOS technology, the technology of video acquisition based on CMOS is becoming a new trend. However, many CMOS camera chip is not supported by the newest Linux kernel yet. In this paper, the method of designing the CMOS camera driver based on S3C2440 developing board with the embedded Linux environment is introduced. SCCB is a distinguishing feature of OV series CMOS chips....
In view of the current status quo, which the feature-based digital watermarking is lack of robustness to non uniform scaling attacks, this paper puts forward a watermarking algorithm based template and local feature. Firstly, the template information is embedded in spatial domain. Then the improved Harris-Laplacian detector is utilized to extract steady feature points from the host image ,the local...
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