15 Mar Draw a rectangle on an image with OpenCV

In OpenCV, use the cv2.rectangle() function to draw a rectangle on an image. First, we will read the image using the imread() function in OpenCV.

Let us now see the example:

The following is the output:

Explanation:

This Python script uses the OpenCV library to load, resize, and draw a rectangle on an image. First, the script imports the OpenCV library:

• It then reads an image from the specified file path and loads it in color. The image is resized to dimensions of 600×600 pixels using the cv2.resize() function.
• After resizing, the script draws a blue rectangle on the image, with the top-left corner at coordinates (15, 25) and the bottom-right corner at coordinates (200, 150).
• The cv2.rectangle() function is used for this purpose, where the first argument specifies the image, the second argument specifies the top-left corner, the third argument specifies the bottom-right corner, the fourth argument specifies the color (blue), and the fifth argument specifies the thickness (15 pixels).
• Finally, the script displays the resized image with the drawn rectangle in a window titled “Image Resized:” using cv2.imshow(), waits for a key press with cv2.waitKey(0), and closes all OpenCV windows with cv2.destroyAllWindows().
• This process allows users to view the modified image with the drawn rectangle and close the display window at their convenience.

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