Python OpenCV cv2.rotate()用法及代碼示例

OpenCV-Python是旨在解決計算機視覺問題的Python綁定庫。cv2.rotate()方法用於將2D數組旋轉90度的倍數。函數cv::rotate以三種不同的方式旋轉數組。

用法： cv2.cv.rotate(    src, rotateCode[, dst] )

參數：
src:它是要更改其色彩空間的圖像。
rotateCode:它是一個枚舉，用於指定如何旋轉數組。
dst:它是與src圖像大小和深度相同的輸出圖像。它是一個可選參數。

返回值：它返回一個圖像。

用於以下所有示例的圖像：

範例1：順時針旋轉90度

# Python program to explain cv2.rotate() method 
  
# importing cv2 
import cv2 
  
# path 
path = r'C:\Users\user\Desktop\geeks14.png'
  
# Reading an image in default mode 
src = cv2.imread(path) 
  
# Window name in which image is displayed 
window_name = 'Image'
  
# Using cv2.rotate() method 
# Using cv2.ROTATE_90_CLOCKWISE rotate 
# by 90 degrees clockwise 
image = cv2.rotate(src, cv2.cv2.ROTATE_90_CLOCKWISE) 
  
# Displaying the image 
cv2.imshow(window_name, image) 
cv2.waitKey(0)

輸出：

範例2：順時針旋轉180度

# Python program to explain cv2.rotate() method 
  
# importing cv2 
import cv2 
  
# path 
path = r'C:\Users\user\Desktop\geeks14.png'
  
# Reading an image in default mode 
src = cv2.imread(path) 
  
# Window name in which image is displayed 
window_name = 'Image'
  
# Using cv2.rotate() method 
# Using cv2.ROTATE_180 rotate by  
# 180 degrees clockwise 
image = cv2.rotate(src, cv2.ROTATE_180) 
  
# Displaying the image 
cv2.imshow(window_name, image) 
cv2.waitKey(0)

輸出：

範例3：順時針旋轉270度

# Python program to explain cv2.rotate() method 
  
# importing cv2 
import cv2 
  
# path 
path = r'C:\Users\user\Desktop\geeks14.png'
  
# Reading an image in default mode 
src = cv2.imread(path) 
  
# Window name in which image is displayed 
window_name = 'Image'
  
# Using cv2.rotate() method 
# Using cv2.ROTATE_90_COUNTERCLOCKWISE  
# rotate by 270 degrees clockwise 
image = cv2.rotate(src, cv2.ROTATE_90_COUNTERCLOCKWISE) 
  
# Displaying the image 
cv2.imshow(window_name, image) 
cv2.waitKey(0)

輸出：

相關用法

注：本文由純淨天空篩選整理自divyamohan123大神的英文原創作品 Python OpenCV – cv2.rotate() method。非經特殊聲明，原始代碼版權歸原作者所有，本譯文未經允許或授權，請勿轉載或複製。