OpenCV-Python是旨在解決計算機視覺問題的Python綁定庫。
cv2.arrowedLine()
方法用於繪製從起點到終點的箭頭線段。
用法: cv2.arrowedLine(image, start_point, end_point, color[, thickness[, line_type[, shift[, tipLength]]]])
參數:
image:它是要在其上繪製線條的圖像。
start_point:它是線的起始坐標。坐標表示為兩個值的元組,即(X坐標值,Y坐標值)。 end_point:它是線的結束坐標。坐標表示為兩個值的元組,即(X坐標值,Y坐標值)。 color:它是要繪製的線條的顏色。對於BGR,我們傳遞一個元組。例如:(255,0,0)為藍色。粗細:是線條的粗細(以像素為單位)。 line_type:表示繪圖線的類型。 shift:表示點坐標中的小數位數。 tipLength:表示箭頭尖端相對於箭頭長度的長度。返回值:返回圖像。
用於以下所有示例的圖像:
範例1:
# Python program to explain cv2.arrowedLine() method
# importing cv2
import cv2
# path
path = r'C:\Users\Atomix\Desktop\geeksforgeeks\geeks.png'
# Reading an image in default mode
image = cv2.imread(path)
# Window name in which image is displayed
window_name = 'Image'
# Start coordinate, here (0, 0)
# represents the top left corner of image
start_point = (0, 0)
# End coordinate
end_point = (200, 200)
# Green color in BGR
color = (0, 255, 0)
# Line thickness of 9 px
thickness = 9
# Using cv2.arrowedLine() method
# Draw a diagonal green arrow line
# with thickness of 9 px
image = cv2.arrowedLine(image, start_point, end_point,
color, thickness)
# Displaying the image
cv2.imshow(window_name, image)
輸出:
範例2:
# Python program to explain cv2.arrowedLine() method
# importing cv2
import cv2
# path
path = r'C:\Users\Atomix\Desktop\geeksforgeeks\geeks.png'
# Reading an image in default mode
image = cv2.imread(path)
# Window name in which image is displayed
window_name = 'Image'
# Start coordinate, here (225, 0)
# represents the top right corner of image
start_point = (225, 0)
# End coordinate
end_point = (0, 90)
# Red color in BGR
color = (0, 0, 255)
# Line thickness of 9 px
thickness = 9
# Using cv2.arrowedLine() method
# Draw a red arrow line
# with thickness of 9 px and tipLength = 0.5
image = cv2.arrowedLine(image, start_point, end_point,
color, thickness, tipLength = 0.5)
# Displaying the image
cv2.imshow(window_name, image)
輸出:
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