用Python进行图像赋值，在1RGB基础上，加入光流两个通道，代码如下所示：
import numpy as np import cv2 import matplotlib.pyplot as plt path = 'frame_00003_rgb.png' img = cv2.imread(path) img1 = np.zeros([480, 640, 5]) img1[:, :, 0:3] = np.array(img) cv2.imshow('test1', np.array(img)[:,:,2]) cv2.imshow('test2', img1[:, :, 0]) cv2.waitKey(10000)打印出来的时候，图像显示空白：
后来找到了问题，是numpy数组11声明的问题，改成uint8就行了：如下所示：
import numpy as np import cv2 import matplotlib.pyplot as plt path = 'frame_00003_rgb.png' img = cv2.imread(path) img1 = np.zeros([480, 640, 5], dtype=np.uint8) img1[:, :, 0:3] = np.array(img) cv2.imshow('test1', np.array(img)[:,:,2]) cv2.imshow('test2', img1[:, :, 0]) cv2.waitKey(10000)
