SAGA-GIS Tool Library Documentation (v9.1.1)

Tool Hough Circle Transformation

Hough Circle Transformation.

References

Parameters

 NameTypeIdentifierDescriptionConstraints
InputGridGrid, inputGRID--
OutputCirclesShapes, outputCIRCLES--
OptionsGrid SystemGrid systemPARAMETERS_GRID_SYSTEM--
UnitChoiceUNIT-Available Choices:
[0] cells
[1] map units
Default: 0
RadiusValue rangeRADIUS--
Minimum DistanceFloating pointMIN_DISTMinimum distance between the centers of the detected circles. If the parameter is too small, multiple neighbor circles may be falsely detected in addition to a true one. If it is too large, some circles may be missed.Minimum: 0.000000
Default: 3.000000
MethodChoiceMETHOD-Available Choices:
[0] Hough gradient
[1] Hough gradient (alternative)
Default: 0
Accumulator ResolutionFloating pointRESOLUTIONInverse ratio of the accumulator resolution to the image resolution. if set to 1, the accumulator has the same resolution as the input image. If set to 2, the accumulator has half as big width and height. For 'Hough gradient (alternative)' the recommended value is 1.5, unless some small very circles need to be detected.Minimum: 1.000000
Default: 3.000000

Command-line

Usage: saga_cmd imagery_opencv 16 [-GRID <str>] [-CIRCLES <str>] [-UNIT <str>] [-RADIUS_MIN <double>] [-RADIUS_MAX <double>] [-MIN_DIST <double>] [-METHOD <str>] [-RESOLUTION <double>]
  -GRID:<str>         	Grid
	Grid, input
  -CIRCLES:<str>      	Circles
	Shapes, output
  -UNIT:<str>         	Unit
	Choice
	Available Choices:
	[0] cells
	[1] map units
	Default: 0
  -RADIUS_MIN:<double>	Radius
	Value range
  -RADIUS_MAX:<double>	Radius
	Value range
  -MIN_DIST:<double>  	Minimum Distance
	Floating point
	Minimum: 0.000000
	Default: 3.000000
  -METHOD:<str>       	Method
	Choice
	Available Choices:
	[0] Hough gradient
	[1] Hough gradient (alternative)
	Default: 0
  -RESOLUTION:<double>	Accumulator Resolution
	Floating point
	Minimum: 1.000000
	Default: 3.000000