树莓派：使用OpenCV调用自带的摄像头.

总所周知，树莓派上，调用摄像头的指令有raspistill和raspivid。若要使用opencv对摄像头进行调用，不少人会出现

cvCaptureFromCAM(0)函数无法找到Pi Cam的错误情况。

但是当树莓派外接USB摄像头时，该函数可以正常使用。但对于一体机器，想要把树莓派封装成一个小机器人。使用自带

摄像头，就需要花点功夫去自己编译生成可以用opencv调用自带摄像头的程序了。过程可能有些许复杂。

复制代码step 1 : install csi webcam step 2 : installation and compilation of userland-master (including mmal and raspicam tools) step 3 : create your own project step 4 : link with OpenCV libraries step 5 : basic use of OpenCV and Pi camera : display an image from camera step 5.5 :use many snapshots to emulate a video (slow) step 6 : capture video within OpenCV window ! Step 7 : Face recognition (magic mirror release 2 :-)

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step 1 : install csi webcam
step 2 : installation and compilation of userland-master (including mmal and raspicam tools)
step 3 : create your own project
step 4 : link with OpenCV libraries
step 5 : basic use of OpenCV and Pi camera : display an image from camera
step 5.5 :use many snapshots to emulate a video (slow)
step 6 : capture video within OpenCV window !
Step 7 : Face recognition (magic mirror release 2 :-)