Form Feature Measurement and Analysis of Plagiocephaly in Infants by Machine Vision
博士 === 國立交通大學 === 工業工程與管理系 === 89 === Head deformation measurement is an important stage for diagnosis and management of infants with plagiocephaly. Because the head shape data of infants is difficult to be obtained under the consideration of safety and cost. So, in clinical, the doctors still estim...
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| Format: | Others |
| Language: | zh-TW |
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2001
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| Online Access: | http://ndltd.ncl.edu.tw/handle/74550642326524071144 |
| Summary: | 博士 === 國立交通大學 === 工業工程與管理系 === 89 === Head deformation measurement is an important stage for diagnosis and management of infants with plagiocephaly. Because the head shape data of infants is difficult to be obtained under the consideration of safety and cost. So, in clinical, the doctors still estimate the change of a head shape by observation or simple measurement. It is difficult for different doctors to describe such unstable states in different clinical environment. This paper is to develop a measuring system that can extract and analyze important features from the head ring images. There are 10 size features and 7 shape features that can be extracted from the head ring images by the developed method. Three important indices were defined in this research: (1) Asymmetry Index (2) Plagiocephaly Index, and (3) Relative Deformity Index. On the other hand, a method that can be used to examine the position and seriousness of the intrusive /extrusive state of a head contour was also developed. Comparing to the current operation processes, this research can derive more results and provide more information from the input head ring images for clinical references.
摘 要 I
ABSTRACT II
誌 謝 III
目 錄 IV
圖目錄 VII
表目錄 IX
符號說明 X
第一章 緒 論 1
1.1 前言 1
1.2 研究動機 1
1.3 研究對象 3
1.4 研究方法及目的 4
1.5 論文架構 6
第二章 文獻回顧 7
2.1 嬰兒頭部變形之探討 7
2.2 影像處理及分析 10
2.2.1 影像前置處理 11
2.2.2 邊界偵測 14
2.2.3 形狀表示及描述 15
2.3 頭形量測技術 17
2.3.1 方法的演進 17
2.3.2 形狀差異 18
2.3.3 形狀的不對稱性 20
第三章 頭圍輪廓擷取 23
3.1 頭環影像前置處理 24
3.2 頭圍輪廓資料擷取 26
第四章 頭圍形態特徵定義與擷取 31
4.1 輪廓大小特徵 31
4.2 輪廓形狀特徵 35
4.2.1 頭圍輪廓的不對稱性 37
4.2.2 頭圍輪廓形狀差異度量測 41
4.2.3 局部形狀的平凸特徵 42
第五章 系統實作與結果驗證 50
5.1 系統的開發環境 50
5.2 系統流程 50
5.3 實例分析 52
5.3.1 特徵值的量測與分析 52
5.3.2 AI值的量測與分析 57
5.3.3 CI值的量測與分析 61
5.3.4 PI值的量測與分析 63
5.3.5 RDI值的量測與分析 64
第六章 結論與建議 66
6.1 結論 66
6.2 改進及建議 67
6.3 未來之研究 68
參考文獻 70
附錄一：頭環規格及製作說明 75
附錄二：正常案例及斜頸案例的年齡、人數和AI值統計 76
附錄三：頭環樣本群組分類 77
附錄四：斜頸患者頭圍輪廓樣本 78
附錄五：六個頭圍輪廓曲率簽字曲線階梯值 79
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