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[Untitled]
- Source :
- Artificial Intelligence Review. 12:117-136
- Publication Year :
- 1998
- Publisher :
- Springer Science and Business Media LLC, 1998.
-
Abstract
- We describe a novel system for grading oranges into three quality bands, according to their surface characteristics. The system is designed to process fruit with a wide range of size (55–100 mm), shape (spherical to highly eccentric), surface coloration and defect markings. This application requires both high throughput (5–10 oranges per second) and complex pattern recognition. The grading is achieved by simultaneously imaging each item of fruit from six orthogonal directions as it is propelled through an inspection chamber. In order to achieve the required throughput, the system contains state-of-the-art processing hardware, a novel mechanical design, and three separate algorithmic components. One of the key improvements in this system is a method for recognising the point of stem attachment (the calyx) so that it can be distinguished from defects. A neural network classifier on rotation invariant transformations (Zernike moments) is used to recognise the radial colour variation that is shown to be a reliable signature of the stem region. The succession of oranges processed by the machine constitute a pipeline, so time saved in the processing of defect free oranges is used to provide additional time for other oranges. Initial results are presented from a performance analysis of this system.
- Subjects :
- Linguistics and Language
Computer science
Zernike polynomials
business.industry
Defect free
Image processing
Multi processor
Neural network classifier
Language and Linguistics
symbols.namesake
Artificial Intelligence
Mechanical design
symbols
Computer vision
Artificial intelligence
Invariant (mathematics)
business
Grading (education)
Subjects
Details
- ISSN :
- 02692821
- Volume :
- 12
- Database :
- OpenAIRE
- Journal :
- Artificial Intelligence Review
- Accession number :
- edsair.doi...........3a94deb6bb726a43ca6a51fe2b2dd2e3