树莓派4b在安装opencv过程中出现这种错误，应该咋办呀？

可能是环境问题，参考一下github的解决方案：

ubuntu build make error · Issue #1950 · opencv/opencv_contrib · GitHub make -j8 error Scanning dependencies of target opencv_test_ximgproc /home/zkl/zklcode/code/pycv/opencv_contrib/modules/xfeatures2d/test/test_rotation_and_scale_invariance.cpp:7:82: fatal error: features2d/test/test_detectors_invariance.i... https://github.com/opencv/opencv_contrib/issues/1950