Polygon match

• Parameters to adjust - degrees of freedom in polygon match algorithm

  1. Translation, rotation - default

  2. Translation, scale

  3. Translation, rotation, scale, skew

     • Note: good image quality and an increased Repeat Count is needed to get a good fit

     • Note: the shape of the polygon must contain information to be able to calculate all degrees of freedom

4. Translation, rotation, perspective

   • Note: good image quality and an increased Repeat Count is needed to get a good fit

   • Note: the shape of the polygon must contain information to be able to calculate all degrees of freedom

5. Translation, rotation, scale

   • Note: alternates between Translation/rotation and Translation/scale for the different passes

6. Translation (circles) - legacy

   • Used mainly for circular polygons

7. Translation

• n - Max repeat count - max number of times to reapply match

• f - Omit further iterations if fit % exceeds - match is considered good enough - process no further

• F - Abort if fit % is less than - discard last iteration and process no further

• Abort if fit % deteriorates - discard last iteration and process no further

• Abort if fit RMS deteriorates - discard last iteration and process no further

• k - Keep best points (%) - disregard "worst case" points in polygon fit

  • Dynamic - keep few points if bad match, more points for good matches

• D - Perform final fit with distance constraints - additional cycle, using only points closer than

  • Final fit max distance (pixels) - distance limit

Multi polygon match

• Activate Multi match to run multiple polygon match validations

• Sample multi match strings are : P1n2C5;P7n4

  • The multimatch string overrides the default settings - the search is ended on first match

Hint: To learn the PolygonMatch concept one can study the PolygonMatch3 tool.

Result acceptance (constraints)

• c - Min match percentage - disregard match if fewer points were fitted

  • The is the primaty contraints - the other are used in more special cases

• r - Max match RMS - disregard match if RMS is larger

• a - Max total angle correction - disregard match if too much movement

• i - Max total distance correction - disregard match if too much movement

• x - Max total offset X correction - disregard match if too much movement

• y- Max total offset Y correction - disregard match if too much movement

Turn off polygon match template validation

• Invalidate template match if polygon match fails - polygon match must succeed for template match to be valid

• Turn off only when teaching / configuring the templatefinder 3