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基于三維線框模型的類球體農(nóng)產(chǎn)品體積和表面積測量
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國家自然科學(xué)基金項(xiàng)目(61405175)和深圳市戰(zhàn)略新興產(chǎn)業(yè)發(fā)展專項(xiàng)(JCYJ20150417094158023)


Measurement of Volume and Surface Area for Spheroid Agricultural Product Based on 3D Wire Frame Model
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    摘要:

    為了快速無損測量不規(guī)則類球體形狀農(nóng)產(chǎn)品的體積和表面積,,提出了基于三維線框模型的圖像處理方法,。即以Android系統(tǒng)為工作平臺,,利用Java結(jié)合OpenCV函數(shù)庫,以三維線框模型為理論指導(dǎo)編寫包括圖像采集,、圖像分割、體積和表面積計算的應(yīng)用軟件,。用3種不同直徑的標(biāo)準(zhǔn)球體在6個拍攝距離下進(jìn)行測量,,所獲測量值與理論值的誤差小于0.3%,表明攝像頭自身畸變小,,在圖像能完整呈現(xiàn)被測物的拍攝距離,,被測物輪廓的大小對測量精度的影響在可接受的誤差范圍之內(nèi)。用所提方法,、排水法和掃描圖像處理法對不規(guī)則形狀的柑橘,、蘋果、梨各10組進(jìn)行體積和表面積測量,,結(jié)果顯示3種測量方法的相關(guān)系數(shù)大于0.98,,表明該方法可較精確測量類球體農(nóng)產(chǎn)品的體積和表面積。

    Abstract:

    This article proposed a new method for fast measurement of the volume and surface area (VSA) of spheroid agricultural products based on 3D wire frame model via image processing using an Android device (AD). The spheroid product counting algorithm software was developed in Java combined with OpenCV library that uses AD to measure the VSA of spheroid agricultural products. The target photos were taken in normal conditions by AD. The image processing was used to get image, segment image, generate binarization image, filter noise, and calculate the VSA according to the coordinate of threedimensional wireframe model. Using this method to measure the ball with different diameters at six distances that between 100mm and 350mm, and the segment spacing was 50mm, which verified that the camera distortion was less than 0.3%, and the contour size of the measured object had scarcely effect on the measurement accuracy. The proposed method was applied to measure the VSA of 10 different citrus, apple and pear, and then all the fruits were measured by drainage method to get their volume and scanning method to attain their surface area. The test result shows that the correlation coefficient among proposed method, drainage method and scanning method was more than 0.98. The results indicated that the introduced method could be utilized as a rapid and nondestructive method for the AD measurement of different spheroid produces of agricultural products.

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龔愛平,張衛(wèi)正,何 勇,聶鵬程.基于三維線框模型的類球體農(nóng)產(chǎn)品體積和表面積測量[J].農(nóng)業(yè)機(jī)械學(xué)報,2016,47(7):338-344. Gong Aiping, Zhang Weizheng, He Yong, Nie Pengcheng. Measurement of Volume and Surface Area for Spheroid Agricultural Product Based on 3D Wire Frame Model[J]. Transactions of the Chinese Society for Agricultural Machinery,2016,47(7):338-344.

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  • 收稿日期:2016-03-09
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  • 在線發(fā)布日期: 2016-07-10
  • 出版日期: 2016-07-10
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