Using MSI-T application to collect Lacey Carbon support data¶

By loosen up criterion of template hole finder used in MSI-T, it can be used as a target finder for Lacey carbon support as shown below used in Exposure Targeting Node.

Original Image¶

Template Correlation¶

• Use cross correlation to create a broad correlation peak
• Use default template and a large value, but smaller than the half width/height of the image to scale the template. This creates a correlation map that is likely to have maximal some distance inside of the hole edge. Hence, for large holes you may see multiple maxima.

Correlation Threshold¶

• Use a small value to threshold the correlation map so that even the weaker peaks from large holes can pass through, but not too low that all blobs are connected.

Blobs¶

• Allow a reasonable number of blobs that you expect it to find to accept most peaks as blobs.
• Accept very large blobs by using a very large Max. blob size in pixels.

Lattice¶

• Give a very large lattice tolerance such as 0.5 so that it will accept all blobs.

Targets¶

• Set up Acquisition targets as in usual MSI-T to avoid empty holes if possible.
• Set to convolute targets so that there are many potential Focus position to screen from
• Set Focus target filtering to prefer thicker ice than the Acquisition targets.