图像修改

1、实现原理

对NumPy数组（图像）进行切片和赋值操作。

2、实现效果

cd ~/opencv

xxxxxxxxxx
python3 03.image_modify.py

注意：选中图片按q可以退出程序！

3、实现代码

​x
import cv2

def modify_image(input_path, output_path):
    image = cv2.imread(input_path)
    if image is None:
        print("Error: Unable to open image file.")
        return
    image[:50, :50] = [255, 255, 255]
    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.")
        
modify_image('/home/jetson/opencv/images/yahboom_logo.png', \
            '/home/jetson/opencv/images/yahboom_logo_modify.png')