通过计算机对图像进行去除噪声、增强、复原、分割、提取特征等处理的方法和技术。-Computer image noise removal, enhanced recovery, segmentation, feature extraction processing, such methods and techniques.

DCT基广泛应用于图像去噪，信号分离。BP与OMP算法作为贪婪算法的代表用于信号恢复。-DCT is widely used in image denoising, signal separation. As a representative of the greedy algorithm of BP and OMP algorithm for signal recovery.