12-1
Color Unevenness Inspection
12
Chapter 12: Color Unevenness Inspection
12-1 Outline
Purpose
Example
Evaluate color unevenness based on the size of certain extracted areas of color
that are outside the reference color range.
Application Evaluate ripeness of tomatoes.
[Inspection procedures]
Capture image
→
Set evaluation conditions (upper and lower limit values)
→
Measurement
[Measurement results]
・
Number of objects
・
Total area
・
Area of each object
・
Max./min. hue
・
Max./min. saturation
・
Number of objects having faulty hue
・
Number of objects having faulty saturation
Image after extracting a color
Captured image
Setting
extracting
color
Upper
value
Evaluation
condition
Upper value
Lower value
Lower
value
Measurement area
Number of
NGs (number
of pixels)
NG
OK
NG
Measured result
NG
OK