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Chapter 21 Vision Control (Option)

21-67

21.8 Labeling

BLOB (Statement)

Function

Executes labeling.

Format

BLOB <Widow number>, <Coordinate X>, <Coordinate Y>, <Processing

object>, <Binary lower limit>[, <Binary upper limit>[, <Link>[, <Area lower

limit>[, <Sort>]]]]

Explanation

<Window number> Designates the window number (0 to 511).

<Coordinate X> Designates the X coordinate (0 to 511).

<Coordinate Y> Designates the Y coordinate (0 to 479).

<Processing object> Designates the object to obtain with labeling (0 or 1).

0: Black (brightness value < binary lower limit, binary

upper limit < brightness value)

1: White(binary lower limit ≤ brightness value ≤ binary

upper limit)

<Binary lower limit> Designates the lower limit for binarization

(0 to 254 lower limit < upper limit).

<Binary upper limit> Designates the upper limit for binarization

(1 to 255 lower limit < upper limit).

If ignored, 255 is set.

<Link> Designates the condition of the link (0 or 1).

0: Neighbor 4 link (Neighbor pixels at right and left, and top and

bottom are checked.)

1: Neighbor 8 link (Neighbor pixels at slant, as well as right and left,

and top and bottom are checked.)

<Area lower limit> Designates a lower limit of an area value to be ignored in

labeling. (0 to 245760)

<Sort> Designates sorting of numbers obtained with labeling (0 to 2).

0: Obtained order

1: Area value descending

2: Area value ascending

By executing labeling, you can obtain the numbers

and positions of multiple objects.

In the example shown on the left, the labeling

number is 4.

If you use BLOBMEASURE, you can obtain the

indination (direction : main axis angle) and the

peripheral length individually.

Example of labeling

Center of gravity coordinate

Filet dia. width

Filet dia. height

Filet dia. reference point

1 2 ... 614 615 616 617 618 619 620 621 622 623 624 ... 691 692

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