Local difference‐based active contour model for medical image segmentation and bias correction
| Autor: | Jianzhong Cao, Yuefeng Niu |
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| Rok vydání: | 2019 |
| Předmět: |
Active contour model
Jaccard index Computer science 020206 networking & telecommunications 02 engineering and technology Image segmentation Robustness (computer science) Signal Processing 0202 electrical engineering electronic engineering information engineering 020201 artificial intelligence & image processing Segmentation Computer Vision and Pattern Recognition Electrical and Electronic Engineering Linear combination Cluster analysis Algorithm Software Energy functional |
| Zdroj: | IET Image Processing. 13:1755-1762 |
| ISSN: | 1751-9667 1751-9659 |
| Popis: | This study proposes a local bias field and difference estimation (LBDE) model for medical image segmentation and bias field correction. Firstly, the LBDE model uses a linear combination of a given set of smooth orthogonal basis functions, which is called Chebyshev polynomial, to estimate the bias field. Then, a clustering criterion function is defined by considering the difference between the measured image and approximated image in a small region. By applying this difference in the local region, the LBDE model can obtain accurate segmentation results and estimation of the bias field. Finally, the energy functional is incorporated into a level set formulation with a regularisation term, and it is minimised via the level set evolution process. The LBDE model first appears as a two-phase model and then extends to the multi-phase one. Extensive experiments on medical images demonstrate that the LBDE model achieves more precise segmentation results in terms of Jaccard similarity and dice similarity coefficient than the comparative models. Therefore the proposed model can increase the segmentation accuracy and robustness to noise. |
| Databáze: | OpenAIRE |
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