Flip

Overview

The Flip sample demonstrates GPU-accelerated image flipping using CV-CUDA’s flip operator. The operator mirrors an image along one or both axes: horizontal (left-right), vertical (top-bottom), or both simultaneously.

Usage

Basic Usage

Flip the default input image horizontally (left-right mirror):

python3 flip.py -i input.jpg

Custom Output Path

Write the flipped result to a custom path:

python3 flip.py -i input.jpg -o cat_flip.jpg

Command-Line Arguments

Argument

Short Form

Default

Description

--input

-i

tabby_tiger_cat.jpg

Input image file path

--output

-o

cvcuda/.cache/cat_flip.jpg

Output image file path

Implementation

Horizontal Flip

# Flip the image along the horizontal axis (left-right mirror).
# flipCode=1 flips left-right; 0 flips top-bottom; -1 flips both axes.
output_image: cvcuda.Tensor = cvcuda.flip(input_image, flipCode=1)
write_image(output_image, args.output)

Key points:

  1. flipCode=1 mirrors the image left-right (horizontal flip).

  2. flipCode=0 mirrors the image top-to-bottom (vertical flip).

  3. flipCode=-1 mirrors the image along both axes simultaneously.

Expected Output

The output is a mirror image of the input flipped left-right:

../../_images/tabby_tiger_cat.jpg

Original Input Image
../../_images/cat_flip.jpg

Output: Horizontally Flipped Image

CV-CUDA Operators Used

Operator

Purpose

cvcuda.flip()

Mirror an image along one or both spatial axes

Common Utilities Used

See Also