低成本影像快速量測足部三維尺寸之研究

Development of High-speed and Low-cost 3-Dimensional Foot Sizes Measuring system based on multi-Images

指導教授 : 黃榮堂、施勝雄  研究生 : 賴柏元  機電整合研究所94年


摘要

  透過多台攝影機或數位相機擷取足部影像,並據此影像作為重建足部立體形狀之方法,使用者穿戴一只印有特殊設計的彩色特徵點編碼所製成的襪子,踩在本研究所設計之影像擷取平台中的強化玻璃上,利用多台的影像擷取裝置擷取足部各個方向影像,利用影像處理技術分析出影像中特徵點編碼圖案之編碼及位置,使用攝影機校正方法進行攝影機參數校正,並利用立體視覺方法,根據其特徵點編碼找出不同影像間之對應關係,藉由立體影像方式計算特徵點代表之世界座標中之三維座標點位置,進而組成立體曲面,經由不同曲面間之疊合重建出三維足部模型,進而量測三維足部尺寸。由於本研究使用的平台,是以成本低廉的網路攝影機作為取像裝置,並利用鋁擠型支架搭配強化玻璃所建構,整體硬體成本低廉,再利用本研究所撰寫的軟體系統,可達到成本低廉、量測快速等目標。
 

關鍵詞:機器視覺、立體影像、三維重建

ABSTRACT

This study developed an apparatus and method that uses at least six digital cameras to capture images of the foot, which can reconstruct the 3D model of the foot rapidly. Users can only wear elastic socks, which have specially coded multicolored stripes or spots, and stands on the transparent plate of a platform. First from two parallel cameras under the transparent plate, the 3D contour about the sole of the foot can be computed and reconstructed through stereosis algorithm. Similarly, from the other four cameras at least around the upper part of the foot, four or more curved surfaces are combined to reconstruct 3D contour of the upper portion of the foot. Combining the bottom contours and upper contours of the foot the complete 3D foot model can be obtained.

Key Words: Machine Vision, Stereo, 3-D reconstruction