opencv3+python3进行图片平移

1、理论基础：B = M * A

M为矩阵，【[1,0,80],[0,1,-80]】

2、向右下移动代码：

#平移

import cv2   as  cv

import numpy as np

from matplotlib import pyplot as plt

from matplotlib.font_manager import FontProperties

plt.rcParams['font.family'] = ['sans-serif']

plt.rcParams['font.sans-serif']=['SimHei'] 

plt.rcParams['axes.unicode_minus']=False #显示负号

font = FontProperties(fname='/System/Library/Fonts/STHeiti Light.ttc', size=16)

# img = cv.imread('c:\\meiping1.png',0)

img = cv.imread('c:\\meiping1.png',1)

rows,cols, channel = img.shape

# 平移矩阵M：[[1,0,x],[0,1,y]]

M = np.float32([[1,0,-80],[0,1,80]])

dest = cv.warpAffine(img,M,(cols,rows))

plt.subplot(1,2,1),plt.imshow(img)

plt.subplot(1,2,2),plt.imshow(dest)

# cv.imshow('dest', dest)

plt.title("左下移")

plt.xticks([]),plt.yticks([])

plt.show()

3、M = np.float32([[1,0,80],[0,1,-80]])

dest = cv.warpAffine(img,M,(cols,rows))

plt.subplot(1,2,1),plt.imshow(img)

plt.subplot(1,2,2),plt.imshow(dest)

# cv.imshow('dest', dest)

plt.title("右上移")

plt.xticks([]),plt.yticks([])

plt.show()

4、M = np.float32([[1,0,-80],[0,1,-80]])dest = cv.warpAffine(img,M,(cols,rows))plt.subplot(1,2,1),plt.imshow(img)plt.subplot(1,2,2),plt.imshow(dest)# cv.imshow('dest', dest)plt.title("左上移")plt.xticks([]),plt.yticks([])plt.show()

5、M = np.float32([[1,0,80],[0,1,80]])

dest = cv.warpAffine(img,M,(cols,rows))

plt.subplot(1,2,1),plt.imshow(img)

plt.subplot(1,2,2),plt.imshow(dest)

# cv.imshow('dest', dest)

plt.title("左下移")

plt.xticks([]),plt.yticks([])

plt.show()

6、小结：

float32[[1,0,80],[0,1,-80]]设置矩阵

warpAffine进行转换实现