Wavelet image coding features TFT Display Module

Image after wavelet transform can get a good space - frequency multi-resolution representation, wavelet image coding has the following key features:
① only to maintain the spatial characteristics of the original image, but also a good high-frequency information extracted image, at low frequencies have a good frequency characteristic at high frequencies with good spatial selectivity;
② selective wavelet components with direction, divided into horizontal, vertical and diagonal directions, and these features are consistent with the human visual characteristics; 320x240 lcd module
③ energy is mainly concentrated in the low frequency sub-image, a low-pass DC component layers of the same, the band-pass components are zero;
④ frequency fuzzy image has a strong correlation, the level of the sub-image correlation coefficient in the horizontal direction and the vertical direction is small; perpendicular to the sub-image correlation coefficient in the horizontal direction and the vertical direction of the large; oblique directional sub-images in the horizontal and vertical direction of correlation coefficients are small.
Based on the above of this unique space - frequency characteristics, so wavelet image coding at higher compression ratio image coding areas have been very promising. OLED Display