pykuwahara

Kuwahara filter in Python (numpy + OpenCV).

The Kuwahara filter is a non-linear smoothing filter used in image processing for adaptive noise reduction. It is able to apply smoothing on the image while preserving the edges. Source: Wikipedia

This implementation provide two variants of the filter:

• The classic one, using a uniform kernel to compute the window mean.
• A gaussian based filter, by computing the window gaussian mean. This is inspired by the ImageMagick approach.

Installation

pip install pykuwahara

Usage

import cv2
from pykuwahara import kuwahara

image = cv2.imread('lena.jpg')

filtered1 = kuwahara(image, radius=3, method='mean')    # default
filtered2 = kuwahara(image, radius=3, method='gaussian')

cv2.imwrite('lena-filtered1.jpg', filtered1)
cv2.imwrite('lena-filtered2.jpg', filtered2)