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Image Saving with OpenCV

This section explains both the concepts and a practical Python example for saving images to disk using OpenCV.

1. Implementation Principle​

OpenCV provides the cv2.imwrite() API to save images.

  • Returns True if the image is saved successfully\
  • Supports common formats such as .png, .jpg, .bmp

2. Implementation Effect​

Navigate to the OpenCV working directory:

cd ~/opencv

Run the image saving script:

python3 02.image_save.py
note

Select the image display window and press q to exit the program.

Saved Image Result

3. Python Example Code​

import cv2

def save_image(input_path, output_path):
    image = cv2.imread(input_path)

    if image is None:
        print("Error: Unable to open image file.")
        return

    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.")

save_image(
    '/home/jetson/opencv/images/hemihex_logo.png',
    '/home/jetson/opencv/images/hemihex_logo_copy.png'
)

4. Code Explanation​

  • cv2.imread() reads the source image from disk\
  • cv2.imwrite() saves the image to the specified path\
  • Display functions are used to preview the saved image

Maintained by HemiHex for OpenCV-based image processing workflows.