正割射影 的英文怎麼說
中文拼音 [zhēnggēshèyǐng]
正割射影
英文
secant projection-
Two groups, one of men and lads, the other of women, had come down the lane just at the hour when the shadows of the eastern hedge - top struck the west hedge midway, so that the heads of the groups were enjoying sunrise while their feet were still in the dawn. they disappeared from the lane between the two stone posts which flanked the nearest field - gate
麥地里被割出來的小路上已經來了兩撥人，一撥人是男子和男孩子，另一撥人是婦女，他們來的時候，東邊樹籬頂端的影子正好投射到西邊樹籬的腰部，所以兩撥割麥人的腦袋沐浴著朝霞的時候，他們的腳卻還處在黎明裡。Secondly, some techniques for image segmentation, such as edge - detection, grayscale thresholding and texture, are represented in detail. in the third part, two primary ways are designed for 3d modeling, one is based on the contours triangularization while the other is based on the iso - surfaces extraction. we use a condensed history monte carlo method to calculate and build up the radiation dosimetry, which is a regular data set suitable for creating the iso - surfaces
論文首先介紹了醫學影像的獲取和預處理的方法，包括dicom標準、醫學影像的圖像增強及圖像校正等內容；提出了基於邊緣提取、灰度閥值和紋理信息等原理的器官分割方法；為了建立三維人體模型，介紹了兩類方法；基於輪廓線的方法和基於等值面提取的方法；在建立放射劑量場時，使用了經典的montecarlo方法；最後，詳細介紹了傳統的等值面提取方法（ marchingcubes ） ，並提出了一種啟發式搜索的marchingcubes方法。
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