python手記(27)

#!/usr/bin/env python
#-*- coding: utf-8 -*-
import cv2
import numpy as np

fn="test2.jpg"

if __name__ == '__main__':
    print 'http://blog.csdn.net/myhaspl'
    print '[email protected]'
    print
    print 'loading %s ...' % fn
    img = cv2.imread(fn)
    sp=img.shape
    print sp
    #height
    sz1=sp[0]
    #width
    sz2=sp[1]
    print 'width:%d\nheight:%d'%(sz2,sz1)
    #建立一個視窗并顯示圖像
    cv2.namedWindow('img')     
    cv2.imshow('img', img)
    #建立原圖像大小相同的空白圖像，然後畫線
    myimg1=np.zeros((sz1,sz2), np.uint8)
    track = np.cumsum(np.random.rand(500000, 2)-0.5, axis=0)
    track = np.int32(track*10 + (sz1/2, sz2/2))
    cv2.polylines(myimg1, [track], 0, 255, 1, cv2.CV_AA)
    cv2.namedWindow('myimg1')     
    cv2.imshow('myimg1', myimg1)
    cv2.waitKey()
    cv2.destroyAllWindows()
      

opencv讀取圖像，擷取圖像大小，建立圖像