Measuring size of objects in an image with opencv

1. How to find the dimensions of an object in an image in Python?
2. How do we measure items on a drawing with OpenCV?
3. Can OpenCV do object detection?

How to find the dimensions of an object in an image in Python?

To get the image shape or size, use ndarray. shape to get the dimensions of the image. Then, you can use index on the dimensions variable to get width, height and number of channels for each pixel.

How do we measure items on a drawing with OpenCV?

The most common way is to perform a checkerboard camera calibration using OpenCV. Doing so will remove radial distortion and tangential distortion, both of which impact the output image, and therefore the output measurement of objects in the image.

Can OpenCV do object detection?

OpenCV is the huge open-source library for computer vision, machine learning, and image processing and now it plays a major role in real-time operation which is very important in today's systems. By using it, one can process images and videos to identify objects, faces, or even the handwriting of a human.