臺灣博碩士論文加值系統

影像變形技術的應用層面很廣，它能提供動態變化視覺效果。不論是基於觀察、評估或預測，以動畫模擬生物體外形的生長，影像變形是其中的一項關鍵技術。本研究利用曲線擬合之方式，以參數式曲線描述前期研究中建立之頭圍輪廓，則此參數式曲線即為頭圍輪廓之近似曲線，再應用影像變形技術，移動參數曲線之控制點，改變參數曲線之形狀，達到模擬嬰兒頭圍形狀之生長變形。設計一視窗化動態展示平台，以2D曲線描述嬰兒頭圍輪廓，同時應用變形技術的原理來模擬初生嬰兒頭形的生長變化。初期達成目標以提供兩種功能：第一，給定一個嬰兒初始及目的之兩張頭圍影像，模擬兩張頭圍影像之平滑轉換；第二，給定一個嬰兒的初始頭圍影像，依據頭圍生長曲線模擬其生長期間的頭圍之生長速率。本研究建立一個嬰兒頭圍形狀變形模擬之平台架構，若欲達到較真實之頭圍生長模擬，在未來研究中，必須蒐集頭骨受外力影響之相關係數，根據這些係數才能使模擬預估頭形生長之效果更接近真實情況。

Image morphing technique is applied to many aspects. It provides visual effects of dynamic change. Image morphing is a key technique for simulating the growth of organism contours by animation. This research uses the way of curve fitting to describe head contours’ files which established by earlier stage research, with parametric curve. And the parametric curve is the approximation curve of the head contour. Then we apply image morphing technique to move the position of the approximation curve’s control points to change the shape of the approximation curve, which also simulates the changing of the infant head shape’s growth. To design a windows platform can demonstrate dynamically and simulate the growth change of a newborn baby’s head circumference by using the principle of the morphing technology. First, we give the initial and the target head contour images then the windows platform presents dynamic intermediate images through the morphing process. Second, we give an infant’s initial head shape image, and the platform simulates the growth rate of the head shape according to head circumference growing curve. In the future, the studying establishes the structure of simulating infant head shape changing platform. The future work is to collect the coefficient correlation that the skull is influenced by external force. According to the coefficient, we can simulate and predict infant head shapes growth truer.

致謝 i
摘要 ii
Abstract iii
目錄 iv
圖目錄 v
表目錄 vii
表目錄 vii
第一章 緒論 1
1.1前言 1
1.2 研究動機 2
1.3 文獻探討 4
第二章 研究方法 7
2.1 Bezier曲線 8
2.2 B-spline曲線 11
2.2.1 B-spline曲線之凸多邊形特性 15
2.2.2 局部控制特性 16
2.2.3 曲線特性比較及選用 18
2.3 曲線擬合 19
2.3.1 B-spline曲線逼近 20
2.3.2 曲線擬合之結果與討論 25
第三章 變形方式 34
3.1 控制點之對應及線性內插 35
3.2 頭圍生長形狀預估 36
第四章 模擬頭圍形狀變形平台 40
第四章 模擬頭圍形狀變形平台 41
4.1 視窗介面設計流程 41
4.2 視窗介面功能操作介紹 42
第五章 討論與未來研究方向 47
參考文獻 49

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