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We proposed a scale adaptive Kalman filter algorithm based on quaternion correlation of color image. Kalman filter is used to predict the object motion direction and define the searching window. In the searching window, the correlation of object and the image is calculated to get the accurate position of the object. Scale adaptive method is efficient to the situation of object size changing. Experiments...
An adaptive bit-allocation method based on perceptual quality smoothing for wireless video communications is proposed. A visual attention model is build by considering skin, motion and position. Then the perceptual video quality distortion is predicted using the visual attention model and channel state information. Finally the MB target bits are allocated according to the predicted perceptual video...
In this paper, we proposed a super pixel based depth map propagation algorithm for the application in 2D to 3D video conversion. The proposed algorithm employs four main processes to generate depth maps for all frames in video sequences. First, the depth map of the key frames in the input sequences are generated by manual work. Second, the frames in the input sequences are over-segmented by Simple...
The virtual view synthesis is a key technique in 3D video applications. In this paper, a new algorithm based on image in painting is proposed. Firstly, the depth image is processed by automatic segmentation to recognize the foreground and background. In order to reduce the big holes generated by view warping, in painting is processed on the edge between foreground and background according to the disparity...
In this paper, we proposed an improved Kalman filter algorithm based on quaternion correlation of color image. Kalman filter is used to predict the object motion direction and define the searching window. In the searching window, the correlation of object and the window image is calculated to get the accurate position of the object. When the object is covered partly, we can get good result, too. Experiments...
As a technique for digital image tampering, copy-move forgery is frequently used. In this paper, an improved lexicographical sort algorithm based on discrete cosine transform (DCT) is developed to detect copy-move forgery. Firstly, the image is split into 8*8 blocks, and the image data undergoes a DCT. Then the DCT coefficients were grouped to reduce the dimension according to the frequency property...
In order to improve the security of steganography system, this paper presents a scheme of steganography based on fractal images. This method makes use of good properties of creation of fractal images, such as ease of generation, sensitive dependence on their initial condition, information are embedded during creating fractal images by secret information and initial parameters. The receiver can extract...
The design criterion of call admission control policy in heterogeneous wireless networks (HWN) is to make full use of the spectrum resources in different radio access systems, under the constraint of seamless QoS. In order to overcome the shortcoming of the traditional optimal guard channel policy (OGCP) in providing seamless QoS, a definition of balance channel is proposed firstly, and then a QoS...
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