Patent ID: 11915392
Assignee: SHANGHAI LINKCHIP SEMICONDUCTOR TECHNOLOGY CO., LTD.
Field: Computer technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 7:
8. An image enhancement apparatus, comprising:
an image acquisition unit configured to acquire an image in a YUV format and separate a brightness component and chrominance components of the image in the YUV format;
a wavelet decomposition unit configured to perform N layers of wavelet decomposition on the brightness component and the chrominance components respectively to obtain, with respect to each layer, low and high frequency sub-bands of the brightness component, and low and high frequency sub-bands of the chrominance components, wherein N is a positive integer greater than 1;
a wavelet reconstruction unit configured to, starting from the (Nmax)th layer, perform 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;
an edge preserving filtering unit configured to perform, according to the brightness component, edge preserving filtering on the chrominance components that have been subjected to the wavelet reconstruction; and
an integration unit configured to integrate the chrominance components that have been subjected to the edge preserving filtering and the brightness component.