Yanhui Xia

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Constructing objective assessment model on visual quality is challenging, since it associates closely with many factors in human visual perception, as well as both source coding and transmission. In this paper, a no reference hybrid model for video quality assessment is proposed by employing Partial Least Squares Regression (PLSR). The hybrid model combines(More)
On the basis of Evalvid tool integrated in NS2 (Network Simulator version 2), the paper gets new set of tools, myEvalvid, to establish the simulation and evaluation platform for multimedia transmission. Then the paper investigates the effects of various influence factors when multimedia information is transmitted in the network and the relationships among(More)
Retinal image vessels can reflect different states of many diseases of the people, which is also the pre-characteristic for the registration and mosaic of retinal images. Therefore, it is very important to accurately extract blood vessels from the retinal images. In this paper, a novel automated approach for segmentation of retinal images is presented,(More)
In this paper, a fast sub-pixel motion estimation algorithm is presented for H.264/MPEG4 AVC video coding. The proposed methods are based on mathematical models of the motion compensated error distribution function to predict the possible searching direction. Here we do not select the parabola in the horizontal direction but the paraboloid in two dimension(More)
OBJECTIVE Increasing evidence supports the involvement of autophagy in the etiopathology of autoimmune diseases. Systemic lupus erythematosus (SLE) is a potentially fatal autoimmune disease characterized by production of multiple autoantibodies through poorly understood mechanism. In order to explore the role of autophagy in the development of SLE, the(More)
Image compression based on DCT often produces distortion of blocking effects, which seriously affect the visual quality of images. In order to detect the distortion of blocking effect, a new approach based on the flat region is presented in this article. The approach has a good correlation to characteristics of human perception, because human eyes are(More)
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