ECM Search

This processing item searches the input image for parts having a high degree of similarity to the target mark (model), and measures its correlation value and position.
This processing assures a stable search even for low-contrast or noisy images.
For ECM search, 25 pixels at each end of an image cannot be registered as a part of the model.

Used for the following cases

When identifying the shape of measurement objects (for detecting defects or foreign matters)

List of ECM Search Items

ECM Search items are explained below.

Table: List of ECM Search Items
Item Name	Description
Model	This item registers the pattern characteristic of the measurement image as a model. Model parameter values can be changed as needed to address unstable measurement results or to improve the processing speed. Usually, the factory default value can be used. [Model (ECM Search)]
Error model	This item can be changed if necessary. Register the error models with models such as: Models with similar characteristics to the registered model, but with its correlation to be lowered when measured. [Error Model (ECM Search)]
Region setting	This item specifies the region to be measured. Instead of measuring the entire input image, narrowing the measurement region shortens the processing time. [Region Setting (ECM Search)]
Detection point	This item can be changed if necessary. Usually, the central position of the set model is registered as the search detection point. [Detection Point (ECM Search)]
Reference position	This item can be changed if necessary. Usually, the central position of the registered region is specified as the reference position. [Ref. Position (ECM Search)]
Measure	This item specifies the judgement condition for measurement results. Specify the criteria to judge the measurement result if its X and Y coordinates and its correlation with the model are OK. [Measurement (ECM Search)]
Output parameter	This item can be changed if necessary. Usually, the factory default value can be used. Use the Output parameter to specify how to treat the coordinate. [Output Parameter (ECM Search)]