WAVELET-BASED ACTIVE CONTOUR MODEL FOR OBJECT TRACKING

We propose an integrated wavelet-based framework for ac-tive contour model(snake), which is used for motion tracking of deformable objects in a sequence of images. The input image frame is decomposed into multi-resolution represen-tation using wavelet transform. First, the wavelet transform coefficients are used in a multi-resolution motion estimation process to find the initial contour in the frame. The presented multi-resolution motion estimation method allows larger movement of the tracked object than the traditional image-based motion estimation. Secondly, the wavelet transform modulus at each scale are considered in the energy function of the active contour model. The application of biologi-cal cell tracking using the proposed method is shown as an example. 1