RPi 2B python opencv camera demo example
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/************************************************************************************** * RPi 2B python opencv camera demo example * 声明: * 本文主要记录RPi 2B 使用python opencv来获取图片的方式。 * * 2016-2-24 深圳 南山平山村 曾剑锋 ************************************************************************************/ 一、参考文档: 1. OpenCV with Raspberry Pi Camera Face Detection Tutorial - Robotics with Python Raspberry Pi and GoPiGo p.7 https://pythonprogramming.net/raspberry-pi-camera-opencv-face-detection-tutorial/ 2. Raspberry Pi OpenCV,在树莓派下使用opencv http://www.educity.cn/wenda/565761.html 二、opencv install: sudo apt-get update sudo apt-get install libopencv-dev sudo apt-get install python-opencv 三、example code #!/usr/bin/python import cv2 as cv import numpy import io import picamera # Create a memory stream so photos doesn‘t need to be saved in a file stream = io.BytesIO() # Get the picture (low resolution, so it should be quite fast) # Here you can also specify other parameters (e.g.:rotate the image) with picamera.PiCamera() as camera: camera.resolution = (320, 240) camera.capture(stream, format=‘jpeg‘) # Convert the picture into a numpy array buff = numpy.fromstring(stream.getvalue(), dtype=numpy.uint8) # Now creates an OpenCV image image = cv.imdecode(buff, 1) # Save the result image cv.imwrite(‘result.jpg‘, image)
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