It display the original or the processed image after certain manipulation.

we use the ___ function whose only parameter is just how long should it wait for a user input (measured in milliseconds).

To save the processed image and choose desire file type associate.

It is a much better and faster way to draw a group of lines than calling ___

____ can be used to draw multiple lines or different shape

Color pattern used in python opencv?

Scaling is just resizing of the image using ___ function

____ function is the size of the output image, which should be in the form of **(width, height)**. Remember width = number of columns, and height = number of rows.

For perspective transformation, you need a 3x3 transformation matrix. Straight lines will remain straight even after the transformation by simply using ___