Omron fh series User Manual

Correlation Value
With processing items that use search processing, judgement is performed through correlation values.
Correlation values are used to check the consistency (degree of similarity) between actual measure-
ment images and reference model images. If portions of measured images are missing or if shapes
are different, the correlation value is lower.
Correlation: 58
Horizontal
C
Correlation: 54
For partial defect
Correlation: 74
For wide line
Correlation: 99
For dark image
Correlation: 43
Larger
Correlation: 58
Different shapes
Model image
B
C
C
C
C
C
Search Angle Range, Skipping Angle
These are values, based on the model registration image, that indicate the allowable rotation interval
(skipping angle) and overall maximum rotation range for the model (angle range). Search is performed
for objects that most resemble these acceptable models.
• Example: When angle range is 15° and skipping angle is 5°
-15°
Registration model
-10°
-5°
Reference
10°
15°
5°
Candidate Point Level
This is the level used for finding models when searching. Images with a correlation value higher than
the candidate point level are used to establish candidate points for search inspection.
Appendices
A - 14
FH/FHV Series Vision System User’s Manual (Z365-E1)

Omron fh series Specifications

General

Type	Machine Vision System
Series	FH Series
Power Supply	24 VDC
Storage Temperature	-20 to 60°C
Humidity	35 to 85% RH (non-condensing)
Image Sensor	CMOS
Processing Speed	High-speed processing
Connectivity	Ethernet
I/O	Digital I/O
Operating System	Embedded OS
I/O Ports	Ethernet, USB