set(DOWNLOAD_DIR "${OpenCV_BINARY_DIR}/downloads/xfeatures2d")download_boost_descriptors("${DOWNLOAD_DIR}" boost_status)download_vgg_descriptors("${DOWNLOAD_DIR}" vgg_status)if(NOT boost_status OR NOT vgg_status)ocv_module_disable(xfeatures2d)endif()ocv_module_include_directories("${DOWNLOAD_DIR}")