python opencv draw rectangle
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OpenCV (Open Source Computer Vision Library) is a powerful library for computer vision and image processing tasks. In this tutorial, we will explore how to draw rectangles on images using OpenCV in Python. Drawing rectangles can be useful for various applications, such as object detection, image annotation, and more.
Before you begin, make sure you have OpenCV installed. You can install it using the following command:
Start by importing the OpenCV library in your Python script:
Load an image on which you want to draw rectangles. Make sure the image file is in the same directory as your Python script, or provide the full path.
Now, let's draw a rectangle on the image. The cv2.rectangle function is used for this purpose. The function takes the image, the coordinates of the top-left and bottom-right corners of the rectangle, the color of the rectangle, and the thickness of the rectangle edges.
Finally, display the image with the drawn rectangle using the cv2.imshow function. This function takes two arguments: the window name and the image.
If you want to save the image with the drawn rectangle, you can use the cv2.imwrite function.
That's it! You have successfully drawn a rectangle on an image using OpenCV in Python. Feel free to customize the coordinates, color, and thickness to suit your specific needs.
Remember to adapt the code to your project requirements and explore other OpenCV functions for more advanced image processing tasks.
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