Opencv rectangle crop

1. How do I crop a rectangle in OpenCV Python?
2. How do I crop an image in OpenCV?
3. How do you crop a bounding box in Python?

How do I crop a rectangle in OpenCV Python?

To crop an image to a certain area with OpenCV, use NumPy slicing img[y:y+height, x:x+width] with the (x, y) starting point on the upper left and (x+width, y+height) ending point on the lower right. Those two points unambiguously define the rectangle to be cropped.

How do I crop an image in OpenCV?

There is no specific function for cropping using OpenCV, NumPy array slicing is what does the job. Every image that is read in, gets stored in a 2D array (for each color channel). Simply specify the height and width (in pixels) of the area to be cropped. And it's done!

How do you crop a bounding box in Python?

The selectROI() function returns an image by allowing us to draw the bounding box wherever necessary. Then the image within the bounding box drawn using selectROI() function can be cropped using imCrop() function. Then the cropped image alone can be displayed as the output on the screen.