Title :
A spot-type defect detection and colour identification system for agricultural produce
Author :
Gunawardena, C.A. ; Clark, L.J. ; Dennis, T.J.
Author_Institution :
Dept. of Electron. Syst. Eng., Essex Univ., Colchester, UK
fDate :
28 Oct-1 Nov 1991
Abstract :
A high-speed system in which color detection is one aspect of an overall quality inspection process for agricultural produce is undergoing development. In a typical application, the system can sort and route tomatoes to many output grades according to their ripeness and size. A CCD (charge-coupled device) color television camera inspects the produce passing on a conveyor of rotating rollers. Color quality is determined by using a three-dimensional lookup table to identify spatial areas which contain a color of interest. The lookup table defines 262, 132 unique colors. Special spot-type defect detection algorithms have been developed to distinguish between diffused color which is spread throughout the entire surface area of an object and color clusters which are concentrated in a much smaller area
Keywords :
CCD image sensors; agriculture; computerised instrumentation; inspection; optical variables measurement; table lookup; agricultural produce; charge-coupled device; coating; color detection; color television camera; colour identification; conveyor; diffused color; grades; high-speed system; ripeness; routeing; size; spot-type defect detection; three-dimensional lookup table; tomatoes; Agricultural engineering; Cameras; Charge coupled devices; Charge-coupled image sensors; Color; Inspection; Logic arrays; Shape; TV; Table lookup;
Conference_Titel :
Industrial Electronics, Control and Instrumentation, 1991. Proceedings. IECON '91., 1991 International Conference on
Conference_Location :
Kobe
Print_ISBN :
0-87942-688-8
DOI :
10.1109/IECON.1991.238950