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03.Image modification

Image modification

Image modification1. Implementation principle2. Implementation effect3. Implementation code

1. Implementation principle

Slice and assign values to NumPy arrays (images).

2. Implementation effect


cd ~/opencv


xxxxxxxxxx
python3 03.image_modify.py

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

3. Implementation code


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')

Image saving

Image scaling