Patent ID: 8792553
Filing Date: 2014-07-29
Classification: G06T,H04N

Abstract:
1. A video enhancement method comprising: applying a wavelet transform to successive images of a video sequence to obtain wavelet coefficients for each image; estimating directions of regularity associated with wavelet coefficients obtained for a current image of the video sequence; determining recursive weights associated with said wavelet coefficients for the current image; computing average multiscale bandlet coefficients for the current image, wherein an average multiscale bandlet coefficient AI(m, j, k, t) associated with a wavelet coefficient WI(m, j, k, t) for the current image is computed as AI(m, j, k, t)=α·WI(m, j, k, t)+(1−α)·AI(p, j, k, t−1), where α=1/w(m, j, k, t) is the inverse of the recursive weight w(m, j, k, t) associated with said wavelet coefficient, m is an index for a position in the image, j and k are scale and orientation indexes of the wavelet transform, t is a time index of the current image and t−1 is a time index of a previous image; processing the average multiscale bandlet coefficients for the current image to produce an enhanced bandlet image; and applying an inverse wavelet transform to the enhanced bandlet image, wherein determining a recursive weight associated with a wavelet coefficient for the current image comprises: