影像物體特徵描述方法及影像處理裝置

專利類型

發明

專利國別 (專利申請國家)

中華民國

專利申請案號

105122791

專利證號

I 590197

專利獲證名稱

影像物體特徵描述方法及影像處理裝置

專利所屬機關 (申請機關)

淡江大學學校財團法人淡江大學

獲證日期

2017/07/01

技術說明

一種影像物體特徵描述方法及裝置。此方法係偵測一輸入影像中的感興趣物體，並計算其質心位置及方向角。接著，辨識此感興趣物體的輪廓，計算輪廓上各個像素與質心位置之間的距離及相對角度，並使用方向角來校正所計算各個像素的相對角度。然後，將以質心位置為中心的360度範圍區分為多等份的角度區間，並依各個角度區間涵蓋的範圍將輪廓上的像素分為多個群組，之後取各個群組的像素的距離中的最大值作為該群組的特徵值，並集合這些特徵值生成特徵向量。最終則將此特徵向量正規化以作為感興趣物體的特徵描述子。 A method and an image processing apparatus for image-based object feature description are provided. In the method, an object of interest in an input image is detected and a centroid and a direction angle of the object of interest are calculated. Next, a contour of the object of interest is recognized and a distance and a relative angle of each pixel on the contour to the centroid are calculated Then, a 360-degree range centered on the centroid is equally divided into multiple angle intervals and the pixels on the contour are separated into multiple groups according to a range covered by each angle interval. Afterwards, a maximum among the distances of the pixels in each group is used as a characteristic value of the group and the characteristic values are collected to form a characteristic vector. Finally, the characteristic vector is normalized to serve as a characteristic describer of the object of interest.

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26215656分機2561

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