python opencv旋转图像(保持图像不被裁减)
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
# -*- 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)
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【听图阁-专注于Python设计】。