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基于雙目立體視覺(jué)的果樹(shù)三維信息獲取與重構(gòu)
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國(guó)家自然科學(xué)基金資助項(xiàng)目(30771243);國(guó)家高技術(shù)研究發(fā)展計(jì)劃(863計(jì)劃)資助項(xiàng)目(2006AA10Z263)


Fruit Trees 3-D Information Perception and Reconstruction Based on Binocular Stereo Vision
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    摘要:

    為實(shí)現(xiàn)果實(shí)收獲機(jī)器人避障,研究了樹(shù)枝空間信息提取方法和果樹(shù)樹(shù)枝三維重建方法:采用歸一化互相關(guān)法獲取立體圖像視差圖,在圖像中提取樹(shù)枝骨架并采用多線段逼近法提取特征點(diǎn);結(jié)合視差圖,利用雙目立體視覺(jué)原理計(jì)算樹(shù)枝骨架特征點(diǎn)的空間坐標(biāo),再利用距離圖像求取樹(shù)枝半徑信息;將分枝點(diǎn)斷開(kāi)形成簡(jiǎn)單線圖形,簡(jiǎn)化了樹(shù)枝三維信息。在空間坐標(biāo)原點(diǎn)采用12棱柱構(gòu)建各段樹(shù)枝模塊,通過(guò)仿射變換將三維模塊以正確的位姿與其他模塊組合成果樹(shù)模型。試驗(yàn)表明,生成的虛擬果樹(shù)為水果采摘機(jī)器人避障及路徑規(guī)劃提供了環(huán)境參照。

    Abstract:

    In order to avoid obstacles for fruit harvesting robot, the method of spatial information extraction of tree branch was studied. The method of normalized cross-correlation was used to get the disparity map of stereo image, branch skeleton was extracted and feature points were extracted by multi-segment approximation method. The spatial coordinates of branch feature points were calculated by combining with the disparity map based on binocular stereo vision, the radius of branch feature points were calculated by using the branch range image, in the end, the forked branch was divided into separate section. Rapid model reconstruction for fruit tree was researched: firstly, each branch module was constructed by 12-prism in the coordinate origin; then, every module was set to the correct posture by affine transformation; finally, the complete fruit tree model was restructured. Experiments show that the virtual trees provide the actual environment reference for obstacle avoidance and path planning of fruit picking machine.

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蔡健榮,孫海波,李永平,孫力,陸化珠.基于雙目立體視覺(jué)的果樹(shù)三維信息獲取與重構(gòu)[J].農(nóng)業(yè)機(jī)械學(xué)報(bào),2012,43(3):152-156. Cai Jianrong, Sun Haibo, Li Yongping, Sun Li, Lu Huazhu. Fruit Trees 3-D Information Perception and Reconstruction Based on Binocular Stereo Vision[J]. Transactions of the Chinese Society for Agricultural Machinery,2012,43(3):152-156.

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  • 在線發(fā)布日期: 2012-03-17
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