c++调用opencv实现图片叠加以及添加水印效果

前言 本篇文章参考了如下文章：ios https://blog.csdn.net/mars_xiaolei/article/details/78791133函数   https://answers.opencv.org/question/73016/how-to-overlay-an-png-image-with-alpha-channel-to-another-png/post     素材 d

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