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Draws circles on an image with two colors, depending on the status of each circle (usually: green or red for pass/fail status).

Name Type Description
inImage Image Input image
inCircles Circle2D?Array?
inCircleAlignment CoordinateSystem2D*
inColorIfTrue Pixel
inColorIfFalse Pixel
inConditions Bool?Array?
inDrawingStyle DrawingStyle
inForceRgb Bool Filter will convert monochromatic image to RGB if needed
outImage Image Output image


The operation draws an array of circles on the inImage using common drawing parameters for all of them. Circles may exceed the image dimensions - those will be drawn partially or not at all, but the filter execution will succeed.


  • Connect an image source to the inImage input. Drawing will be done on this image.
    • If you want to draw on an empty background, use EmptyImage filter before.
  • Define inCircles. This will be the primitives to be drawn.
  • Define inConditions with the boolean values indicating the class (usually: OK/NOK) for each input primitive.
  • Set the inColorIfTrue and inColorIfFalse inputs to define the two colors used for drawing.
  • Set inForceRgb to True, if you want to get a 3-channel output regardless of what is on the input.
  • Set inDrawingStyle to control quality, opacity, thickness, filling, point shapes and sizes.


Description of usage of this filter can be found in examples and tutorial: Fertilizer Granulation, Fuses, Mounts (Blob Analysis), Mounts (Contour Analysis).

Example usage of the DrawCircles_TwoColors on an empty image.

Complexity Level

This filter is available on Basic Complexity Level.

Filter Group

This filter is member of DrawCircles filter group.

See Also