python中利用opencv读取图像并显示需要用到cv2.imread('你的图片文件名字')，但是如果是内存中的图片文件数据怎么显示出来呢，google到了结果。
import numpy as np import cv2 from cv2 import cv # Load image as string from file/database fd = open('foo.jpg') img_str = fd.read() fd.close() # CV2 nparr = np.fromstring(img_str, np.uint8) img_np = cv2.imdecode(nparr, cv2.CV_LOAD_IMAGE_COLOR) # cv2.IMREAD_COLOR in OpenCV 3.1 # CV img_ipl = cv.CreateImageHeader((img_np.shape[1], img_np.shape[0]), cv.IPL_DEPTH_8U, 3) cv.SetData(img_ipl, img_np.tostring(), img_np.dtype.itemsize * 3 * img_np.shape[1]) # check types print type(img_str) print type(img_np) print type(img_ipl)