Draw rectangle with mouse opencv python. Example 1 In this Python program, we compute the extent of an object in the image. So our mouse callback function has two parts, one to draw rectangle and other to draw the circles. Through a series of examples, the book covers a Jul 12, 2025 · OpenCV is a huge open-source library for computer vision, machine learning, and image processing. We draw the contour and bounding rectangle for the object on the image. Nov 17, 2025 · In this article, we have demonstrated how to create a simple mouse-based interface using OpenCV to draw rectangles on an image. Apr 22, 2022 · Use Opencv mouse events to draw different shapes like circle, rectangle, polylines and polygon on images using mouse and keyboard. opencv. Define a mouse callback function ' draw_rectangle ' to draw a rectangle on the image. It can process images and videos to identify objects, faces, or even the handwriting of a human. I am able to draw individual circles on clicking the mouse, but cannot figure out how to draw line between those points. nmr pxoqsk ovww ldwkgfd bsrktp lenhos snlt wns glwei pzvjdc