Image analysis – Color image processing – Color correction
Patent
1995-05-11
1998-08-25
Couso, Yon
Image analysis
Color image processing
Color correction
348 30, 348187, 358520, 382141, G06K 900
Patent
active
057991057
ABSTRACT:
A color sorting apparatus has a singulator section, a color sorter and a conveyor which drops the sorted objects into appropriate collection bins. Objects for sorting are transported on an endless conveyor on wheels through the singulation and color sorting section. An independently adjustable speed belt rotates in the same direction as the wheels and operates to provide a view of each of four sides of the object to an imaging device. The imaging device, such as a camera, supplies red, green and blue signals to an image processor which performs a color transformation and obtains a single composite hue value for each object or piece of fruit to be sorted. Based on a comparison of the hue value to user programmed grading criteria, signals are provided to the conveyor so that the objects are ultimately deposited in appropriate sorting bins. The apparatus also provides one or more of color calibration with respect to predetermined color standard references, a dynamic color calibration, a fine tuning adjustment, color correction based on size, shape measurement and a hue value transformation that provides a stable hue value.
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Agri-Tech, Inc.
Couso Yon
Patel Jayanti K.
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