spiht算法处理24位彩色图像，可以选择小波变换层数和任意比压缩，对低比特流压缩实现优化-spiht algorithms dealing with 24-bit color images, you can choose wavelet transform layers and arbitrary than the compression, low bit-stream compression for optimal

介绍对图层的简单渲染和唯一值渲染,以及如何打开属性表。和操作图层等内容-Describes the simple rendering and unique values of the layer rendering, and how to open the property sheet. And operational layers, etc.