OpenCV perspectiveTransform

1. What is perspective transform in OpenCV?
2. What is perspective transform?
3. How does perspective transform work?

What is perspective transform in OpenCV?

In Perspective Transformation, we can change the perspective of a given image or video for getting better insights into the required information. In Perspective Transformation, we need to provide the points on the image from which want to gather information by changing the perspective.

What is perspective transform?

Fundamentally, it is a transformation of a frame of reference that allows a more “democratic” way of perceiving and acting in the world. Perspective transformation implies not just a change of perception but action as well because it is not enough to see the world differently; one must act differently in it.

How does perspective transform work?

A perspective transformation is simply a fractional linear equation that is solved from a matrix formation. The fractional linear equation is of the form that is linear in the numerator and linear in the denominator, i.e. first order terms at the highest in both numerator and denominator.