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A new method of elastic articulated objects (human bodies) modeling was presented based on a new conic curve. The model includes 3D object deform able curves which can represent the deformation of human occluding contours. The deformation of human occluding contour can be represented by adjusting only four de-formation parameters for each limb. Then, the 3D deformation parameters are determined by corresponding 2Dcontours from a sequence of stereo images. The algorithm presented in this paper includes deform able conic curve parameters determination and the plane, 3D conic curve lying on, parameter determination.