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raspberry-pi-opencv-patch

Missing .i & .h file during installation of opencv on Raspberry Pi 4B.

由于 Raspberry Pi 4B 上编译opencv 3.4.9以及opencv_contrib-3.4.9的依赖过程当中,由于国内网络屏蔽造成的部分.i文件无法正常下载,而在执行sudo make install命令时出现~/opencv_contrib/modules/xfeatures2d/src/boostdesc.cpp:673:20: fatal error: boostdesc_bgm.i: No such file or directory等一系列错误信息。

Problem

通过打开/home/pi/Downloads/opencv/build目录(即源码编译后的二进制文件所在目录)下的CMakeDownloadLog.txt日志文件,搜索如下缺失的.i文件名称:

boostdesc_bgm.i
boostdesc_lbgm.i
boostdesc_bgm_bi.i
boostdesc_bgm_hd.i

boostdesc_binboost_064.i
boostdesc_binboost_128.i
boostdesc_binboost_256.i

vgg_generated_48.i
vgg_generated_64.i
vgg_generated_80.i
vgg_generated_120.i

Solution

找到对应的下载地址,完成下载后将其拷贝至/home/pi/Downloads/opencv_contrib-3.4.9/modules/xfeatures2d/src目录下面,重新执行sudo make install即可解决报错问题。

注意:上述.i依赖文件已经全部放入本项目根目录下,适用于opencv 3.4.9opencv_contrib-3.4.9版本的编译。

Appendix

对于在执行sudo make install命令过程当中,出现的无法找到cuda.hppxfeatures2d.hppnonfree.hpp头文件的情况,只需要用文件查找命令,查询到该文件的所在位置:

find -name "xxx.hpp"

然后将头文件所在的/home/...路径名,添加至报错的.cpp源代码文件的#include预包含指令里面,即可以解决问题。

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