ass日本风韵熟妇pics男人扒开女人屁屁桶到爽|扒开胸露出奶头亲吻视频|邻居少妇的诱惑|人人妻在线播放|日日摸夜夜摸狠狠摸婷婷|制服 丝袜 人妻|激情熟妇中文字幕|看黄色欧美特一级|日本av人妻系列|高潮对白av,丰满岳妇乱熟妇之荡,日本丰满熟妇乱又伦,日韩欧美一区二区三区在线

3D reconstruction of agriculture and forestry crops plays an important role in the studies on the biological characteristics of the crop, canopy light distribution and agricultural robot applications. Structures of crops are complex. Fast and accurate three-dimensional reconstruction of the crop is a challenging task. Crop 3D reconstruction methods have caused extensive concerns in the relevant field of study. This paper reviewed the methods of 3D reconstruction of agriculture and forestry crops. According to the technology and core device used, those methods are divided into four categories, rule-based method, image-based method, scan-based method and method based on 3D digitizer. According to this classification, the hardware of the various methods and applications in agriculture and forestry crop 3D reconstructions were summarized and described and the advantages and disadvantages of different methods were analyzed and compared. Finally, the development trend of the crop reconstruction was discussed. 