Fruit three morphological structure three-dimensional (3D) reconstruction method based on multi-scale measurement data

Abstract

The invention discloses a fruit tree morphological structure three-dimensional (3D) reconstruction method based on multi-scale measurement data, and the method provided by the invention belongs to the technical field of computer graphs and comprises the following steps: S1, extracting a skeleton of fruit tree branches from an original three-dimensional point cloud data of the fruit tree obtained by a three-dimensional scanner, and reconstructing a three-dimensional model of a fruit tree trunk from the skeleton; S2, obtaining the morphological feature information of a fruit tree sprout in a sampling manner, and constructing a three-dimensional model of a plurality of sprouts; S3, obtaining three-dimensional point cloud data of a plurality of fruit tree leaves in sampling manner by the three-dimensional scanner, reconstructing a three-dimensional model of the plurality of leaves to serve as a leave template library in the reconstruction of the three-dimensional model of the fruit tree morphological structure; S4, constructing a space distribution model of different types of branches and leaves at a fruit tree canopy according to the measured form feature information of branches and leaves at the fruit tree canopy; and S5, using the results from the step 1 to the step 4 to reconstruct a whole morphological structure three-dimensional model. The method provided by the invention is simple, convenient, rapid and accurate.

Description

technical field [0001] The invention relates to the technical field of computer graphics, in particular to a method for three-dimensional reconstruction of fruit tree morphological structure based on multi-scale measurement data. Background technique [0002] In recent years, with the continuous improvement of requirements for plant details and precision in applications such as agricultural research, game production, advertising, and landscape display, as well as the maturity and popularity of 3D information collection equipment, especially the continuous development of 3D digitizers and laser scanners Improvement, measurement speed and accuracy are getting higher and higher, so fruit trees are more and more used in the collection of plant morphological information and then realize the three-dimensional reconstruction of plant morphological structure. Compared with other plants such as field crops and flowers, fruit trees not only have a taller shape, but also have a more co...

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Problems solved by technology

These methods all have a common disadvantage: due to the large number of branches and leaves in the tree canopy, it is often difficult to reconstruct twigs and leaves directly from the scan data, so these methods generate twigs and leaves by applying some random rules to achieve visual However, this kind of reconstruction has not reached the real sense of "reconstruction based on measurement data". The reconstructed three-dimensional tree canopy structure is still quite different from the real tree, especially the density of leaves, space Orientation, leaf area, etc. may have large errors from the actual situation, and it is difficult to apply to the research and analysis of tree canopy light distribution characteristics, spatial distribution of branches and leaves, plant type characteristics, etc.

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