Patent ID: 7286716
Filing Date: 2007-10-23
Classification: G06T

Abstract:
1. An image quality enhancement circuit using inter-frame correlations in a circuit performing histogram equalization on a luminance signal represented in the predetermined number of gray levels, comprising: a first transfer function generator calculating histogram data corresponding to a gray level distribution with respect to an inputted luminance signal by a frame unit to generate a first transfer function by using the histogram data; an inter-frame correlativity calculator calculating inter-frame correlation coefficients from the histogram data for at least one previous frame and a current frame, to output inter-frame correlation information corresponding to the inter-frame correlation coefficients; a transfer function adjustor selectively outputting the first transfer function based on the inter-frame correlation information outputted from the inter-frame correlativity calculator; and a mapper correcting and outputting the inputted luminance signal based on the first transfer function outputted from the transfer function adjustor.