Yujuan Sun

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This paper proposes a fast algorithm for three-dimensional face reconstruction using uncalibrated Photometric Stereo. With a reference face model, lighting parameters are estimated from input face images lighted by unknown illumination, which can be used in classical photometric stereo to estimate surface normal and albedo. The estimated results are used in(More)
CONTEXT We have found that hydrogen (dihydrogen [H2]) decreases plasma low-density lipoprotein (LDL) cholesterol levels and improves high-density lipoprotein (HDL) function in patients with potential metabolic syndrome in a before-after self-controlled study. OBJECTIVE The purpose of this study was to further characterize the effects of H2-rich water (0.9(More)
In this paper, a simple and efficient method, based on Quaternionic Distance Based Weber Descriptor (QDWD) and object cues, is proposed for saliency detection. Firstly, QDWD, which was initially designed for detecting outliers in color images, is used to represent the directional cues in an image. Meanwhile, two low-level priors, namely the color contrast(More)
Fuzzy C-means(FCM) has been adopted to perform image segmentation due to its simplicity and efficiency. Nevertheless it is sensitive to noise and other image artifacts because of not considering spatial information. Up to now, a series of improved FCM algorithms have been proposed, including fuzzy local information C-means clustering algorithm(FLICM). In(More)
The field of neural networks can be thought of as being related to artificial intelligence, machine learning, parallel processing, statistics, and other fields. The attraction of neural networks is that they are best suited to solving the problems that are the most difficult to solve by traditional computational methods. In this paper, the author first(More)
In this paper, a novel and efficient framework by exploiting Quaternionic Distance Based Weber Local Descriptor (QDWLD) and object cues is proposed for image saliency detection. In contrast to the existing saliency detection models, the advantage of the proposed approach is that it can combine quaternion number system and object cues simultaneously, which(More)
The conception of supply chain comes into being at the end of 1970s'. The enterprise can reduce the cost and promote the efficiency by control the value stream, money stream, and information stream and work stream in the supply chain. The SCM theme covers a broad spectrum of construction supply chain related issues, including value stream mapping and(More)
Person re-identification is an important technique towards automatic search of a person's presence in a surveillance video. Two fundamental problems are critical for person re-identification:feature representation and metric learning. At present, there are many methods in the study of person re-identification, which has achieved remarkable results. Due to(More)
In this paper, a method for lighting directions estimation of the uniform texture images has been proposed. The proposed algorithm does not require training database, and only utilizes one input image for estimating the lighting directions. By detecting the largest direction of the brightness changes of the input image, the azimuth angle of the light source(More)