本文实例为大家分享了python opencv旋转图像的具体代码,保持图像不被裁减,供大家参考,具体内容如下
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# -*- coding:gb2312 -*-
import cv2
from math import *
import numpy as np
img = cv2.imread( "3-2.jpg" )
height,width = img.shape[: 2 ]
degree = 45
#旋转后的尺寸
heightNew = int (width * fabs(sin(radians(degree))) + height * fabs(cos(radians(degree))))
widthNew = int (height * fabs(sin(radians(degree))) + width * fabs(cos(radians(degree))))
matRotation = cv2.getRotationMatrix2D((width / 2 ,height / 2 ),degree, 1 )
matRotation[ 0 , 2 ] + = (widthNew - width) / 2 #重点在这步,目前不懂为什么加这步
matRotation[ 1 , 2 ] + = (heightNew - height) / 2 #重点在这步
imgRotation = cv2.warpAffine(img,matRotation,(widthNew,heightNew),borderValue = ( 255 , 255 , 255 ))
cv2.imshow( "img" ,img)
cv2.imshow( "imgRotation" ,imgRotation)
cv2.waitKey( 0 )
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效果图:
以上就是本文的全部内容,希望对大家的学习有所帮助,也希望大家多多支持服务器之家。
原文链接:https://blog.csdn.net/yjl9122/article/details/70833330