Second , a limited rate algorithm for picture downsampling was improved , and the realization process was deduced in detail . the simulation results of different algorithms and theoretic deducing showed that this algorithm had relatively higher psnr and lower computation cost 接着,改进了一种受限比例图像下采样算法,详细推导了其实现过程,由不同算法的仿真结果和理论分析可知,该算法具有较高的信噪比和较低的运算复杂度。
百科解释
In signal processing, downsampling (or "subsampling") is the process of reducing the sampling rate of a signal. This is usually done to reduce the data rate or the size of the data.