RMagick is an interface between the Ruby programming language and the MagickCore image processing libraries. ImageMagick® is a software suite to create, edit, compose, or convert bitmap images. It can read and write images in a variety of formats

OpenCV是一个基于BSD许可（开源）发行的跨平台计算机视觉库，可以运行在Linux、Windows、Android和Mac OS操作系统上。它轻量级而且高效——由一系列 C 函数和少量 C++ 类构成，同时提供了Python、Ruby、MATLAB等语言的接口，实现了图像处理和计算机视觉方面的很多通用算法。(OpenCV is a cross platform computer vision library based on BSD licensing (open source) that