Transforms each pixel value to maximum or minimum depending on whether they belong to the specified range.
|Region of interest
|Minimum value of a pixel that is considered foreground (Auto = -INF)
|Maximum value of a pixel that is considered foreground (Auto = +INF)
|A tolerance for inMin/MaxValue that results in intermediate output values
The operation transforms each pixel value to the maximum or minimum level thus creating binary image. The result of the transformation depends on the pixel intensity:
- Pixel values in range (inMinValue, inMaxValue) are transformed to the maximum level.
- Other pixel values are transformed to the minimum level.
If any of the parameters inMinValue, inMaxValue is not set, it is assumed to be, accordingly, -infinity or infinity.
Parameter inFuzziness (set to 0 by default) allows to perform fuzzy thresholding which linearly interpolates those pixel values that differ by at most inFuzziness from the values inMinValue, inMaxValue; thus creating smooth transition between minimum and maximum values in the resulting image (see Remarks section).
In the multichannel images the operation uses an average of channel values in each pixel, thus the resulting image is always monochromatic.
- Define inMinValue to obtain white pixels for bright objects (brighter than the specified value).
- Define inMaxValue to obtain white pixels for dark objects (darker than the specified value).
- Use inFuzziness to add some smooth transitions between black and white pixels in the result.
This operation is optimized for SSE2 technology for pixels of types: 1xUINT8 (for inFuzziness = 0), 3xUINT8 (for inFuzziness = 0).
This operation is optimized for AVX2 technology for pixels of types: 1xUINT8 (for inFuzziness = 0), 3xUINT8 (for inFuzziness = 0).
This operation is optimized for NEON technology for pixels of types: 1xUINT8 (for inFuzziness = 0), 3xUINT8 (for inFuzziness = 0).
This operation supports automatic parallelization for multicore and multiprocessor systems.
This filter can throw an exception to report error. Read how to deal with errors in Error Handling.
List of possible exceptions:
|Region exceeds an input image in ThresholdImage.
This filter is available on Basic Complexity Level.
This filter is member of ThresholdImage filter group.
- ThresholdToRegion – Creates a region containing image pixels with values within the specified range.