Raspberry 3B+ OpenCV Python 使用CSI接口摄像头的人脸检测

首先解决 cv2.VideoCapture(0) 无法获取CSI接口摄像头问题

nano /etc/modules

在末尾添加

bcm2835-v4l2

这样就完成了在启动过程中加载camera驱动

GO ON！！！

代码参考《OpenCV 3计算机视觉-Python语言实现》第74页  Learning OpenCV Computer Vision with Python-Second Edition  P74

按照原书的代码无法成功运行，需要做适当修改

下面是修改后的代码：

#视频人脸检测
#Author: Michael Jiang
#Last-Modified : 2018年10月19日23:05:37

import cv2
def detect():
	face_cascade = cv2.CascadeClassifier('haarcascade_frontalface_default.xml')
	eye_cascade = cv2.CascadeClassifier('haarcascade_eye.xml')
	camera = cv2.VideoCapture(0)
	while(True):
		ret,frame = camera.read()
		gray = cv2.cvtColor(frame,cv2.COLOR_BGR2GRAY)
		faces = face_cascade.detectMultiScale(gray,1.3,5)
		for (x,y,w,h) in faces:
			img = cv2.rectangle(frame,(x,y),(x+w,y+h),(255,0,0),2)
			roi_gray = gray[y:y+h,x:x+w]
			roi_color = img[y:y+h, x:x+w]
			eyes = eye_cascade.detectMultiScale(roi_gray)
			for (ex,ey,ew,eh) in eyes:
				cv2.rectangle(roi_color,(ex,ey),(ex+ew,ey+eh),(0,255,0),2)
		cv2.imshow("camera",frame)
		if cv2.waitKey(1) & 0xff == ord("q"):
			break
	camera.release()
	cv2.destroyAllWindows()
if __name__ == "__main__":
	detect()