package opencv was not found in the pkg-config search path. perhaps you should add the directory containing `opencv.pc' to the pkg_config_path environment variable no package 'opencv' found

未在 pkg-config 搜索路径中找到 opencv 包。也许你应该将包含 “opencv.pc” 的目录添加到 pkg_config_path 环境变量中，没有找到名为 “opencv” 的包。