| Presentation | 2001/1/18 A Method to Calclulate the Hyper Surface Curvature and Its Application to Analysis of 3-D X-ray CT Images Using Local Hyper Surface Fitting Kazuhiro KUNIMITSU, Yasushi HIRANO, Jun-ichiro TORIWAKI, |
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| PDF Download Page | PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | In this paper, we propose a method to calculate the hyper surface curvature from three dimensional(3-D) gray images using the local hyper surface fitting, and reveal its basic characteristics. In this method, we treat a 3-D gray images as a hyper surface in the four dimensional space, and estimate the shape feature of this hyper surface. Using this result, we can calculate the curvature without approximation of partial derivatives as in the previous method. As a result of the comparison between the proposed method and the previous one, it was shown that the proposed method was more robust against noise, and that direction dependency of the calculated curvature is less than the previous method. The curvature obtained by the proposed method was utilized as a criterion of region extansion in the region glowing algorithm employed for. We applied the method of region growing using the hyper surface curvature as the conditions of region extension for extracting lung vessel area from 3-D chest X-ray CT images. We concluded that this method could extract area of lung vessels which were hardly extracted using simple thresholding against a CT value. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Local hyper surface fitting / Hyper surface curvature / Analysis of 3-D image / Segmentation / method of region growing |
| Paper # | MI2000-65 |
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| Committee | MI |
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| Conference Date | 2001/1/18(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
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| Paper Information | |
| Registration To | Medical Imaging (MI) |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | A Method to Calclulate the Hyper Surface Curvature and Its Application to Analysis of 3-D X-ray CT Images Using Local Hyper Surface Fitting |
| Sub Title (in English) | |
| Keyword(1) | Local hyper surface fitting |
| Keyword(2) | Hyper surface curvature |
| Keyword(3) | Analysis of 3-D image |
| Keyword(4) | Segmentation |
| Keyword(5) | method of region growing |
| 1st Author's Name | Kazuhiro KUNIMITSU |
| 1st Author's Affiliation | Dep.of Information Eng., Graduate School of Engineering, Nagoya University() |
| 2nd Author's Name | Yasushi HIRANO |
| 2nd Author's Affiliation | Dep.of Information Eng., Graduate School of Engineering, Nagoya University |
| 3rd Author's Name | Jun-ichiro TORIWAKI |
| 3rd Author's Affiliation | Dep.of Information Eng., Graduate School of Engineering, Nagoya University |
| Date | 2001/1/18 |
| Paper # | MI2000-65 |
| Volume (vol) | vol.100 |
| Number (no) | 596 |
| Page | pp.pp.- |
| #Pages | 6 |
| Date of Issue | |