图片处理：完成图片的颜色反转

#完成图像的颜色反转
#RGB 255-R = newR
#灰度图的颜色反转：0-255 255-当前
import cv2
import numpy as np

img = cv2.imread('image0.jpg',1)
imgInfo = img.shape
height = imgInfo[0]
width = imgInfo[1]
#转化为灰度图片
gray = cv2.cvtColor(img, cv2.COLOR_BGR2GRAY)
#3代表彩色图片，1代表灰色图片，定义空白矩阵，类似画布
dst1 = np.zeros((height,width,1), np.uint8)
dst = np.zeros((height,width,3),np.uint8)

for i in range(0,height):
    for j in range(0,width):
        #灰度图反转
        grayPixel = gray[i,j]
        dst1[i, j] = 255 - grayPixel

        (b, g, r) = img[i, j]
        dst[i,j] = (255-b, 255-g, 255-r)
#打印彩色图片，灰度图不打印
cv2.imshow('dst', dst)
cv2.waitKey(0)