关于OpenCV的好处之一就是它提供了许多内置的用于图像处理和计算机视觉相关操作的基础元素。如果你需要通过scratch写入某些内容，你将不得不定义一些东西，比如图像、点、角度等等，这些几乎是任何计算机视觉算法的基础。OpenCV提供了这些开箱即用的基础数据结构，它们都包含在core模块中。另外一个好处是，这些数据结构都已经针对速度和内存做了优化，因此，你不用担心实现细节。(One of the benefits of OpenCV is that it provides a number of built-in basic elements for image processing and computer vision related operations. If you need to write some content through scratch, you will have to define something, such as image, point, angle and so on. These are almost the foundation of any computer vision algorithm. OpenCV provides the basic data structures that are open and out of use, all of which are included in the core module. Another advantage is that these data structures have been optimized for speed and memory, so you don't have to worry about implementing the details.)