Title: 利用影像曲面曲率之影像表示方法
The Representation of Image by Using Curvature Information of Image Surfaces
Authors: 劉錫鑫
Liu, Hsi-Hsing
王聖智
Wang Sheng-Jyh
電子研究所
Keywords: 影像表示;曲面曲率;影像曲面;擴張斜率;浸蝕斜率;形態學;Image Representation;Surface Curvature;Image Surface;Dilation Gradient;Erosion Gradient;Morphology
Issue Date: 1996
Abstract: 影像之表示法在影像處理中是重要的一環。影像之表示法是將影像中
主要的特徵以一種方便處理的形式來表示。一般而言,影像之表示有許多
方式。在本篇論文中,我們提出利用影像曲面之曲率來表示影像。對於要
找的特徵點而言,對比和曲率是兩個主要的屬性。形態學對於處理幾何特
性,像大小,形狀及對比提供有效之方法。我們改變形態學所提供低通濾
波之方法提出一個能消除影像雜訊且保留影像邊緣特性的方法。同時,利
用形態學的斜率來粗略估計曲率,並使用形態學的擴張斜率及侵蝕斜率的
極值來偵測特徵點。這方法可以很容易以軟體方式或硬體方式來實現。我
們也介紹數個曲率估計之方法,並比較這些方法。
Image representation is important. Representation is to
transform the imagedata into a form which contains the major
features of the image and is easierto be processed. Generally,
an image may be represented in many ways. In thisthesis, a
scheme for the representation of an image surface by using
thecurvature information is proposed. The contrast and
curvature are the twomajor attributes of a feature point that
we are looking for. Since "morphology" can efficiently deal
with somegeometrical features, like size, shape andcontrast,
a modified morphological smoothing method is used to smooth
thenoise while preserving edges. The morphological gradient is
used to roughlyestimate the curvature. The maxima of dilation
gradient and erosion gradientare used for the detection of
the feature points. This method can be easilyimplemented in
both software and hardware. Several curvature estimation methods
are also introduced, and the comparison of these methods is
shown.
URI: http://140.113.39.130/cdrfb3/record/nctu/#NT850428086
http://hdl.handle.net/11536/61958
Appears in Collections:Thesis