Which of the following will give the same result as cv2.flip(img, 1)? ("img" represents BGR image)

To determine which operation gives the same result as cv2.flip(img, 1) in OpenCV, we need to understand what cv2.flip(img, 1) does.

Understanding cv2.flip

1. Functionality: The cv2.flip() function flips the image around the specified axis.
2. Parameter Explanation: The second parameter, when set to 1, indicates a flip around the vertical axis (x-axis), which effectively mirrors the image horizontally.

Equivalent Operations

Given this understanding, let's explore equivalent operations:

• Mirroring the image horizontally can be achieved through other operations as well, such as using numpy slicing in combination with OpenCV operations.

Example of Equivalent Operation

To achieve the same effect as cv2.flip(img, 1), you can use the following code:

flipped_image = img[:, ::-1]

This line of code uses numpy slicing to reverse the columns of the image array, which has the same effect as flipping the image horizontally.

Summary

1. cv2.flip(img, 1) flips the image horizontally.
2. An equivalent operation is img[:, ::-1].

Thus, any option that indicates reversing the columns of the image or explicitly states mirroring/horizontal flip will yield the same result as cv2.flip(img, 1).