2-23-(1)
ECM Search
Section 2-23
2-23
ECM Search
The Edge Code Model (ECM) Search processing item finds the section of the
input image that is closest to the mark to be found (model) and detects its cor-
relation (similarity) and position.
This processing item can perform stable searches even for low contrast
images or images with a lot of noise.
Example: Finding Positioning Marks on Liquid Crystal Substrate
HELP
Refer to
7HUPLQRORJ\
for information on edge codes (EC).
Positioning mark
Registered model
Positioning mark found even in the following
conditions.
A lot of noise
Chipped
Low contrast
