Blob Analyzer Related Topics Arc Finder Configuring Arc Finder Properties Configuring Arc Finder Properties - Advanced Blob Analyzer The Blob Analyzer processes pixel information within a rectangular region of interest The tool uses these pixel values to apply image segmentation algorithms for blob detection. A blob is any region within a greyscale image with a range of grey-level values that differs from the adjoining areas of the image. To create a Blob Analyzer tool, right-click in the Tree structure, then select:
New > Vision > Tool > Blob Analyzer ACEUser's Guide, 3.6.x, 18316-000 Rev A Page 399 Object Definition Average Contrast Average contrast between light and dark pixels on either side of the found arc, expressed in grey- level values. Fit Quality Normalized average error between the calculated arc or line entity, and the actual edges matched to the found entity. Fit quality ranges from 0 to 1, with 1 being the best quality. A value of 1 means that the average error is 0. Conversely, a value of 0 means that the average matched error is equal to Conformity Tolerance. Match Quality Percentage of edges matched to the found arc. Match Quality ranges from 0 to 100.
A value of 100 means that edges were matched to 100% of the points along the found entity. Similarly, a value of 20 means edges were matched to 20% of the points along the found entity.