image_denoise_test

image_denoise_test, a C code which calls image_denoise() to use the median filter to try to remove noise from an image.

Licensing:

The computer code and data files described and made available on this web page are distributed under the MIT license

Related Data and Programs:

image_denoise, a C code which applies simple filtering techniques to remove noise from an image.

Source Code:

• image_denoise_test.c, a sample calling program.
• image_denoise_test.sh, runs all the tests.
• image_denoise_test.txt, the output file.

BALLOONS is an RGB image of a couple with balloons, to which salt and pepper noise has been added.

• balloons_noisy.ascii.pgm, the ASCII PGM file of glassware, with added noise.
• balloons_noisy.png, a PNG version.
• balloons_median_news.ascii.ppm, the ASCII PPM file of balloons, after the noise has been filtered using the median NEWS filter.
• balloons_median_news.png, a PNG version.
• balloons_median_news2.ascii.ppm, after application 2 of MEDIAN NEWS.
• balloons_median_news2.png, a PNG version.
• balloons_median_news3.ascii.ppm, after application 3 of MEDIAN NEWS.
• balloons_median_news3.png, a PNG version.
• balloons_median_news4.ascii.ppm, after application 4 of MEDIAN NEWS. Notice that most of the remaining defects are 2x2 blocks of equal noise value, which cannot be filtered.
• balloons_median_news4.png, a PNG version.

GLASSWARE is a grayscale image of glassware, to which salt and pepper noise has been added.

• glassware_noisy.ascii.pgm, the ASCII PGM file of glassware, with added noise.
• glassware_noisy.png, a PNG version.
• glassware_mean_news.ascii.pgm, the ASCII PGM file of glassware, after the noise has been filtered using the mean NEWS filter.
• glassware_mean_news.png, a PNG version.
• glassware_median_news.ascii.pgm, the ASCII PGM file of glassware, after the noise has been filtered using the median NEWS filter.
• glassware_median_news.png, a PNG version.