Faliang Chang

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In this paper, an efficient method for human facial expression recognition is presented based on LBP descriptor. Firstly, the face normalization is employed in order to improve the efficiencies of extracting facial features. Then, the feature blocks which mainly contain the eyes and mouth were obtained, and each feature block image was divided into several(More)
The nonsubsampled contourlet transform (NSCT) has properties of multiresolution, localization, directionality, and anisotropy. The directionality property permits it to resolve intrinsic directional features that characterize the analyzed image. In this paper, we present a bottom-up salient object detection approach fusing global and local information based(More)
This paper describes a traffic sign detection (TSD) framework that is capable of rapidly detecting multiclass traffic signs in high-resolution images while achieving a high detection rate. There are three key contributions. The first is the introduction of two features called multiblock normalization local binary pattern (MN-LBP) and tilted MN-LBP(More)
The Hausdorff distance template matching algorithm is one of the most popular algorithms recently for its robustness to the noise and the occlusion. But if the binary image that has lots of edge pixel points, this algorithm needs a long time to calculate the distance one by one, so we propose the small region filtration method to reduce the computing time.(More)
Changes of arterial pressure waveform characteristics have been accepted as risk indicators of cardiovascular diseases. Waveform modelling using Gaussian functions has been used to decompose arterial pressure pulses into different numbers of subwaves and hence quantify waveform characteristics. However, the fitting accuracy and computation efficiency of(More)
In this paper, we propose a high-performance traffic sign recognition (TSR) framework to rapidly detect and recognize multiclass traffic signs in high-resolution images. This framework includes three parts: a novel region-of-interest (ROI) extraction method called the high-contrast region extraction (HCRE), the split-flow cascade tree detector (SFC-tree(More)
This paper presents a real-time and automatic video tracking system with a single pan-tilt-zoom (PTZ) camera. Compared with fixed camera, it can enlarge the surveillance area. By using three-dimensional background-weighted histogram in HSV color space, an improved mean-shift algorithm is proposed, and the algorithm can track target with multiple colors in(More)
Image registration is to seek a spatial alternation which can make a 2D or 3D image to consist with another 2D or 3D image in space; it is an important technique in image processing. The concept of image registration is introduced in detail in this paper, and the main emphasis is how to choose the feature points. The author raises a new algorithm to choose(More)