This tool uses a relative blob analysis to pick and return local intensity extrema in a 2D image. It will return the brightest and/or darkest areas of the image.

Setup

Reference

• A reference tool

ROI

• Whole image - use the whole image
• Center-X/Y, dX, dY - Position and size of the ROI rectangle

Settings

• Smooth length - image smoothing prior to analysis
• Smooth count - image smoothing prior to analysis
• Relative threshold - threshold to find an extremum
• Smoothing - blob smoothing
• Use pixel values for center of gravity - if checked, center of gravity is weighted by intensity values; otherwise, blobs are considered "flat"

Results

• Sort by - results sorted by either area or intensity
  • Inv - reverse sort
• Max number of maxima - max number of maxima to report (up to 15)
• Max number of minima - max number of minima to report (up to 15)

Outgoing reference

• First maximum - child reference at center of first reported maximum
• First minimum - child reference at center of first reported minimum

Constraints

Blob filter

• Min area - ignore blobs smaller than this
• Max area - ignore blobs larger than this
• Min circularity - min circularity for reported blobs
• Max circularity - max circularity for reported blobs