User`s manual

G-5
Glossary
G
- Expansion contraction
Delete e isolated black points by expansion and then restore the original image size by
contraction.
Contraction expansion
Delete isolated white points by contraction and then restore the original image size by expan-
sion.
[F]
Fillet width (shading width)
Size of a hollow rectangle which closely matches to the target object in a binary image (white part).
Horizontal direction: Length of a side parallel to the X axis. Vertical direction: Length of a side
parallel to the Y axis.
Flat width
See "Edge detection."
Full pixel reading (progressive scan)
A system which reads all of pixels of image information from the CCD element one after another is
referred to as "full pixel reading system." This system provides the same high resolution for moving
objects as it does for static objects.
On the other hand, conventional CCDs using the NTSC scanning technique must read an object two
times. First the odd lines are read and then the even lines. Therefore, NTSC system produces blurry
images of moving objects. In order to solve this problem, the NTSC system can read only the odd
lines. The disadvantage is that only half the resolution is available.
Binary conversion
Expansion
Contraction
Binary conversion
Contraction
Expansion
Fillet width (horizontal)
Fillet height (vertical)
Odd line
Full pixel reading system
Even line
Image signal
Full linesEven lineOdd line
CCD
Conventional NTSC system