Pixel

Bilateral filter

Materials science

Median filter

Image processing

Computer science

Filter (signal processing)

Anisotropic diffusion

Pattern recognition (psychology)

Mathematics

Image (mathematics)

Enhanced Data Rates for GSM Evolution

Artificial intelligence

Medicine

Noise reduction

Noise (video)

Computer vision

Journal of Applied Biomedicine

An alternative non-linear filtering technique for medical image denoising while preserving edge is introduced. Two different variants of the approach i.e. crisp and fuzzy are developed. The solution is demonstrated based on US breast images as well as CT studies and gave promising results in comparison with commonly known and popular filtering techniques (i.e. spatial averaging and median, bilateral filter, anisotropic diffusion). Many different measures were used to evaluate the method. There are pixel-to-pixel error measures, structural information factors and edge preservation measures. The benefits are noticeable in all three categories.

Granular filter in medical image noise suppression and edge preservation