Add line segments

1. Implementation principle

Use cv2.line() function to draw a short line on the image.

2. Implementation effect

cd ~/opencv

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python3 11.image_draw_line.py

Note: Select the image and press q to exit the program!

3. Implementation code

​x
import cv2
​
def draw_line(input_path, output_path, start_point, end_point, color, thickness):
    image = cv2.imread(input_path)
    if image is None:
        print("Error: Unable to open image file.")
        return
    cv2.line(image, start_point, end_point, color, thickness)
    if cv2.imwrite(output_path, image):
        print(f"Image saved to {output_path}")
        cv2.imshow('Image Preview', cv2.imread(output_path))
        cv2.waitKey(0)
        cv2.destroyAllWindows()
    else:
        print("Error: Unable to save image file.")
​
draw_line('/home/jetson/opencv/images/yahboom_logo.png', \
          '/home/jetson/opencv/images/yahboom_logo_line.png', \
          (50, 150), (700, 150), (0, 0, 255), 5)