A method and a device reconstructing three-dimensional surfaces of potatoes by using fixed-axis rotation profile diagrams

A three-dimensional surface, fixed-axis rotation technology, applied in 3D modeling, image data processing, instruments, etc., can solve problems such as large differences in results

Active Publication Date: 2016-12-14
ZHEJIANG UNIV
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Problems solved by technology

[0008] In order to solve the problem that the two-dimensional image method detects the potato shape and calculates the surface area with the change of the camera angle of view, the result differ

Method used

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  • A method and a device reconstructing three-dimensional surfaces of potatoes by using fixed-axis rotation profile diagrams
  • A method and a device reconstructing three-dimensional surfaces of potatoes by using fixed-axis rotation profile diagrams
  • A method and a device reconstructing three-dimensional surfaces of potatoes by using fixed-axis rotation profile diagrams

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Embodiment Construction

[0055] The present invention will be further described below in conjunction with drawings and embodiments.

[0056] Such as figure 1 As shown, the device used in the implementation of the present invention comprises ring light source 1, camera 2, turntable controller 3, computer 4 and electric turntable 5, potato sample 6 is installed on the output shaft of electric turntable 5, electric turntable 5 and The turntable controller 3 is connected, and the camera 2 faces directly downward to take a side image of the potato sample 6. The turntable controller 3 and the camera 2 are connected to the computer 4 through cables, and a ring light source 1 is installed between the potato sample 6 and the camera 2. , the ring light source 1 is located above the potato sample 6 and below the camera 2, and the ring light source 1 and the camera 2 are concentric. The long axis of the potato sample 6 is installed coaxially with the output shaft of the electric rotary table 5, so that the potat...

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Abstract

The invention provides a method and a device reconstructing three-dimensional surfaces of potatoes by using fixed-axis rotation profile diagrams. The method comprises the steps of collecting side images of a potato sample via a camera; acquiring three-dimensional skeleton data of the potato sample via image processing; further forming the curved surface of the model surface of the potato sample through further processing of the three-dimensional skeleton data of the potato sample to finish the reconstruction of the three-dimensional surface. The device comprises an annular light source, a camera, a rotary table controller and an electric rotary table; a potato sample is installed on an output shaft of the electric rotary table; the electric rotary table is connected with the rotary table controller; the camera faces right downward and captures the side images of the potato sample; the rotary table controller and the camera are connected with a computer via cables; the annular light source is installed between the potato sample and the camera. The three-dimensional surface is reconstructed based on multiple profile diagrams collected when a potato rotates around a fixed axis, so that the accuracy of potato shape detection is improved. The detection apparatus is simple.

Description

technical field [0001] The invention relates to a method and a device for reconstructing a three-dimensional surface, in particular to a method and a device for reconstructing a three-dimensional surface of a potato by using a fixed-axis rotation contour map. Background technique [0002] Potato shape is one of the grading indicators stipulated in the grading standard of "China Agricultural Standard Potato Grade Specifications (NY / T1066-2006)". In order to use machine vision technology to detect the potato shape of potatoes, domestic and foreign scholars have carried out a lot of research. [0003] Fourier descriptor method: Tao Y et al. (Tao Y., Morrow C L Heinemann P H, eta1.Fourier-based separation technique for shape grading of potatoes using machine vision[J].Transactions of the ASAE, 1 995, 38(3) :949-957) proposed a machine vision method for detecting and classifying potatoes using Fourier descriptors. The shape information is extracted and compressed from the norma...

Claims

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Application Information

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IPC IPC(8): G06T17/30
CPCG06T17/30
Inventor 饶秀勤杨耀民应义斌
Owner ZHEJIANG UNIV
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