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Gaussian blur

This simple program performs a gaussian blur on given image, using «sliding window» technique, which allows to compute resulting image with O(n × M × N ) + O(m × M × N ) complexity, where M × N stands for input image dimensions and m, n stands for 6 * sigma (sigma is passed as a parameter to program).

Here is the example of program usage result.

Original image:

GIMP Gaussian blur (radius = 15):

Gblur (sigma = 5):

Downloading

You can clone this repo with git:

git clone https://git.ivnglkv.ru/ivnglkv/gblur.git

Dependencies

This program uses libjpeg library.

Compiling

In order to build this program you should have cmake and make installed. Also install development headers for libjpeg library.

After that, build it with

make

Output binary will be placed into build directory.

Usage

gblur -i input_file [-o output_file] [-s radius] [-h]

Options:

-i: path to file with input RGB JPEG image.
-o: path to file where blured RGB JPEG image will be recorded. If no path will be specified, input file will be overwritten!
-s: radius of blur. Default is 5.
-h: show this help.

Example of usage:

gblur -i img.jpg -o blured_img.jpg -s 5

License

Licensed under The BSD-3 Clause License

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