Warp Perspective
Explore how to warp a selected portion of an image using OpenCV in C++. Learn to obtain pixel points, create a perspective transform matrix, and apply warpPerspective to edit images effectively.
We'll cover the following...
We'll cover the following...
Sometimes we want only a portion of an image. For example, while scanning a document, we might need to get only a part of the document. Here we’ll use the picture of the notebook below and warp only its left portion.
Original image
Getting the dimensions of the image
To get the pixel points of the image’s corners, we can use any image-editing tool, like MS Paint. When we move the cursor to the corner, we’ll get ...