python 摄像头拍照手动输命名_使用python－openCV对摄像头捕捉的镜头进行二值化并打上文字...

获取图像高度和宽度,并初始化文字字体,在 1/2 高度处写入“3100102592 menglixia”的字符串,以颜色红色(在二值化后的图像中显示为 黑色)

5. 显示每一帧图像:

cv.ShowImage("camera",img)

#coding=utf-8

import cv2.cv as cv

def binaryThreshold(Image, threshold):

grey = cv.CreateImage(cv.GetSize(img),cv.IPL_DEPTH_8U, 1)

out = cv.CreateImage(cv.GetSize(img),cv.IPL_DEPTH_8U, 1)

cv.CvtColor(Image,grey,cv.CV_BGR2GRAY)

cv.Threshold(grey, out ,threshold , 255 ,cv.CV_THRESH_BINARY)

return out

if __name__ == '__main__':

#threshold = input("threshold=")

cv.NamedWindow("camera",1)

capture = cv.CaptureFromCAM(0)

while True:

""" capture image from camera """

img = cv.QueryFrame(capture)

""" convert color image to grey """

#img = binaryThreshold(img, threshold)

""" Get the width and height of the image """

(width, height) = cv.GetSize(img)

""" put text id and name in image """

text_font = cv.InitFont(cv.CV_FONT_HERSHEY_DUPLEX, 2, 2)

cv.PutText(img, "3100102592 menglixia", (50, height / 2), text_font, cv.RGB(255, 255, 0))

""" show each frame """

cv.ShowImage("camera",img)

""" press esc to quit the script """

if cv.WaitKey(10) == 27:

break

del(capture)

cv.DestroyWindow("camera")