IMAGE ENHANCEMENT METHOD AND APPARATUS

An image enhancement method includes: acquiring an image in a YUV format (110); performing N max layers of wavelet decomposition on a brightness component and chrominance components respectively (120); starting from the (N max)th layer, performing wavelet reconstruction on the low frequency sub-bands of the chrominance components of each layer on which edge preserving filtering has been performed according to the low frequency sub-band of the brightness component of the corresponding layer, and the high frequency sub-bands of the chrominance components continuously towards an upper layer until an image of an original size is obtained (130); performing, according to the brightness component, edge preserving filtering on the chrominance components that have been subjected to the wavelet reconstruction (140); integrating the chrominance components that have been subjected to the edge preserving filtering and the brightness component (150).