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ThresholdImage_Color


Module: FoundationPro

Transforms each pixel value to maximum or minimum depending on the distance from a given color.

Applications

Color analysis with a given reference color.
Name Type Range Description
inImage Image Input image
inRoi Region* Region of interest
inRgbColor Pixel Color to compare the image to
inChromaAmount Real 0.0 - 1.0 Proportion of chromatic information in distance computation
inMaxDifference Real 0.0 - Maximum difference between image pixel and model color
inFuzziness Real 0.0 - A tolerance for computed difference that results in intermediate output values
outMonoImage Image

Requirements

For input inImage only pixel formats are supported: 1⨯uint8, 2⨯uint8, 3⨯uint8, 4⨯uint8.

Read more about pixel formats in Image documentation.

Hints

  • Define the reference color by setting the inRgbColor input. You can use the Color Picker tool on an image preview and then copy-and-paste the value.
  • Increase inChromaAmount to make the filter less sensitive to changes in brightness. Decrease it to make brightness more important.
  • Set inMaxDifference experimentally to a value that best separates the foreground and background pixels.
  • Use inFuzziness to add some smooth transitions between black and white pixels in the result.

Examples

ThresholdImage_Color performed on a sample image with inRgbColor = (192, 34, 22), inChromaAmount = 1.0, inMaxDifference = 48.

Hardware Acceleration

This operation is optimized for SSE2 technology for pixels of types: 1xUINT8 (for inFuzziness = 0), 3xUINT8 (for inFuzziness = 0).

This operation supports automatic parallelization for multicore and multiprocessor systems.

Errors

This filter can throw an exception to report error. Read how to deal with errors in Error Handling.

List of possible exceptions:

Error type Description
DomainError Region exceeds an input image in ThresholdImage_Color.
DomainError Not supported inImage pixel format in ThresholdImage_Color.

Complexity Level

This filter is available on Basic Complexity Level.

Filter Group

This filter is member of ThresholdImage filter group.

See Also

  • ColorDistanceImage – Compares each pixel with the specified color using chromatic and non-chromatic information.