画像を読み込んで表示

python 2.7
numpy 1.8.1
openCV 2.4.9
Windows 7 64bit

openCV2
import cv2 img = cv2.imread('lena.jpg') cv2.imshow('Lena',img) cv2.waitKey() cv2.destroyAllWindows()

openCV
import cv2.cv as cv img = cv.LoadImage('lena.jpg') cv.ShowImage('Lena',img) cv.WaitKey() cv.DestroyWindow('Lena')

openCV -> openCV2
IplImage -> cvmat -> numpy.ndarray
import cv2.cv as cv import cv2 import numpy as np img = cv.LoadImage('lena.jpg') tmp = cv.GetMat(img) nimg = np.asarray(tmp) cv2.imshow('Lena',nimg) cv2.waitKey() cv2.destroyAllWindows()

openCV2 -> openCV
numpy.ndarray -> IplImage
import cv2.cv as cv import cv2 tmp = cv2.imread('lena.jpg') img = cv.CreateImageHeader((tmp.shape[1], tmp.shape[0]), cv.IPL_DEPTH_8U, 3) cv.SetData(img, tmp.tostring(), tmp.dtype.itemsize * 3 * tmp.shape[1]) cv.ShowImage('Lena',img) cv.WaitKey() cv.DestroyWindow('Lena')

print type(img)
で、型が確認できるので便利。


LINK
OpenCV 2.4.9.0 documentation » OpenCV API Reference »core. The Core Functionality
opencv2.2　クックブック　NumPy と OpenCV