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首页> 外文会议>Conference on Biological Quality and Precision Agriculture II, Nov 6-8, 2000, Boston, USA >A multi-spectral inspection station detects defects on apples
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A multi-spectral inspection station detects defects on apples

机译：多光谱检查站可以检测苹果上的缺陷

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摘要

The performance of a multi-spectral apple inspection station capable of orienting some cultivars, conveying, and presenting apples to a camera at five apples per second is described. Apples are pre-sized and hand placed on the conveying devices to rotate about an axis passing through both the stem and calyx of each apple. An image of each apple is captured at four different wavelengths through a common aperture. Special optics and filters allow simultaneous image capture of apple reflectance for wavelength bands of 540nm, 650nm, 750nm, and 950nm, each with a bandwidth of approximately 60nm. As each apple is conveyed laterally and rotated through the camera's field of view, 6 regions of interest representing most of the apple's surface at each wavelength band are captured. The images are processed to segment each defect from the surrounding undamaged tissue and the area of each defect is recorded. Typical defects such as new bruises, bruises on stored apples, scab, sooty blotch, corking, rot, russet, and insect damage are detected. Data is shown quantifying the ability of the inspection station to sort damaged apples into appropriate grades for correct pricing in the processing industry.
机译：描述了一个多光谱苹果检测站的性能，该检测站能够以每秒五个苹果的速度对某些品种进行定位，运输并将苹果呈现给相机。苹果已预先设置好大小，并手动放置在输送设备上，以绕着穿过每个苹果的茎和花萼的轴旋转。每个苹果的图像通过一个公共光圈以四个不同的波长捕获。特殊的光学器件和滤光片可同时捕获540nm，650nm，750nm和950nm波长带的苹果反射率图像，每个带宽约60nm。当每个苹果被横向传送并旋转通过相机的视场时，将捕获代表每个波段上大部分苹果表面的6个感兴趣区域。对图像进行处理以从周围未损坏的组织中分割出每个缺陷，并记录每个缺陷的区域。可检测到典型的缺陷，例如新的青肿，苹果上的青肿，结sc，煤烟斑，软木塞，腐烂，赤褐色和昆虫危害。显示的数据量化了检验站将受损苹果分类为适当等级以在加工行业中进行正确定价的能力。

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