G-8
G
Glossary
Ë Pixel
On the CCD, the electrically charged elements are in close proximity, arranged in a matrix (480 lines in
vertical direction, 512 rows in horizontal direction). One element is equivalent to one pixel.
Binary
conver-
sion
Object
identifi-
cation
(in order of
scanning)
Object identification
(in order of area)
Island
1
1
2
2
3
3
4
4
Island
[O]
Ë Object identification and numbering function, (labeling)
Object identification and numbering (labeling) is a process for locating separate object and assigning
serial numbers (labels) one at a time in a binary image. By this process, multiple objects in the same
binary image can be handled separately or as a group.
Whole image reading Partial image reading
512 512
480
120
[P]
Ë Partial CCD reading
The "partial CCD reading" technique reads only that part of the CCD which contains the object needed for
image processing. This can shorten the data transfer time from the CCD camera to the image memory.
To read the entire CCD image (480 horizontal lines) takes approximately 33 ms. With the partial reading
technique (e. g.: 120 horizontal lines) can take only 25 % of the time to read the entire image.
The IV-S20 can automatically determine the width of the partial image window. You can change back and
forth between reading the whole image and a partial image.
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