最新的，很好的PDF阅读器，无需要安装，单文件直接运行并注册文件类型-The latest, very good PDF reader, no need to install a single file to run directly to and register file types

图像处理：包括图像灰度处理、二值化、放大缩小、边缘检测、hough变换和其他功能-Image Processing: including gray processing, binarization, zoom, edge detection, hough transform, and other features