7-(14)
Terminology
Section 7-4
Software flow con-
trol, Xon/Xoff con-
trol
A flow control method. Flow is controlled using Xon and Xoff signals.
Correlation
The extent of conformity with the model is expressed as a correlation value. A correlation
value between 0 and 100 is displayed. The higher the correlation value, the more similar
the input image is to the model.
Density image
Density images are the gray images of 256 gradations read by the Camera.
Flow control
Flow control is used to adjust the rate of data transfer. The receiving side notifies the send-
ing side when it cannot keep up with the processing speed, causing the sending side to
interrupt the transmission, and then the receiving side notifies the sending side when it
wants the transmission to be restarted.
Flow control methods include both hardware and software methods. The Controller uses
software flow control.
Model
The model is the image pattern used for detection.
Term
Explanation
Receiving Side
Sending Side
Data sent.
Data sent.
Data send interrupted.
Data sent.
Data sent.
(Buffer close to overflowing.)
(Processing speed falling behind.)
(Buffer data processed)
(Sufficient buffer space available.)
Xon sent (releasing busy status).
Xoff sent (notifying of busy status).
Data sent.
Data sent.
Data send interrupted.
Data sent.
Data sent.
(Buffer close to overflowing.)
(Processing speed falling behind.)
(Buffer data processed)
(Sufficient buffer space available.)
Notification sent to release busy status
Notification of busy status sent.
Receiving Side
Sending Side
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