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This paper presents an algorithm for face determination by using the method of convolution and average face template. Firstly, human face images are used to synthesize average face template. Then convolution is applied to each detecting image to get the convolution value. Finally, the threshold decision principle is applied to determine whether the detecting image is human face or non-face. Three...
To achieve the calibration parameters of vision measurement system, this paper presents a new camera calibration method based on grid recognition. The calibration is implemented by acquiring the corresponding relations between the world coordinates and pixel coordinates of the planar gridding target image captured by camera. Meanwhile, the pixel coordinates of the target image are detected separately...
Structuring element and morphological filtering are important methods to process and analyze images. The conception and character of generalized structuring element (GS) and expended morphological filtering (EMF) are presented. The advantage of GS and EMF is given out comparing to the traditional structuring element and morphological filtering. Two typical experiments using the theory of GS and EMF...
Measurement of short-term and long-term deflections is a necessary step towards understanding and evaluating the status of a bridge. In this paper, a novel non-contact weighted-stretched-wire (NCWSW) system is developed for measuring the deflection of a bridge. Also some factors related to the system are addressed. The proposed system is promising due to some attractive features such as high precision,...
Structure deflections are key parameters to reflect its state, Non-contact Weighted-Stretched-Wire System (NCWSWS) is a novel system for measuring on-line deflections of big structures. This paper presents the configuration of the system and its measurement principle, researches errors due to the stretched-wire component and photography system, and corresponding strategies are given to reduce the...
Face detection is a key technique of face recognition using images in video sequences. In order to improve the accuracy of face location in video sequences, the paper presents a method for locating face in video sequences through analysis of face features in video sequences. Background removing, skin region detecting, horizontal brightness projection and face template with gradient calculating, feature...
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