NON-LINEAR THRESHOLDING DIFFUSION METHOD FOR SPECKLE NOISE REDUCTION IN ULTRASOUND IMAGES
| Main Author: | Sribi M P*, Mredhula L |
|---|---|
| Format: | Article |
| Terbitan: |
, 2018
|
| Subjects: | |
| Online Access: |
https://zenodo.org/record/1435379 |
Daftar Isi:
- Ultrasound (US) medical images are very important tools in modern medicine used for the diagnosis and study of various illnesses. Speckle is the important phenomenon that affects the quality of ultrasound images. This paper presents a new speckle suppression method in US images. The idea is based on the combination of different filters in serial as well as parallel form. The speckle noise affected image is separated into two parts using adaptive weighted median filter. These two parts are then filtered using wavelet transform and the wavelet coefficients are processed with soft thresholding. Then the processed coefficients of each parts are transformed back in to the space domain. The two processed parts are then summed. Finally diffusion filter is used to get the better de-noised image. A comparative study of different filters, conventional method with the proposed method is present in this paper. The experimental results show that the proposed method has the better noise reduction.