Name
zero_crossingzero_crossingZeroCrossingzero_crossingZeroCrossingZeroCrossing — Extract zero crossings from an image.
zero_crossingzero_crossingZeroCrossingzero_crossingZeroCrossingZeroCrossing returns the zero crossings of the input
image as a region. A pixel is accepted as a zero crossing if its
gray value (in ImageImageImageImageImageimage) is zero, or if at least one of its
neighbors of the 4-neighborhood has a different sign.
This operator is intended to be used after edge operators returning
the second derivative of the image (e.g., laplace_of_gausslaplace_of_gaussLaplaceOfGausslaplace_of_gaussLaplaceOfGaussLaplaceOfGauss),
which were possibly followed by a smoothing operator. In this case,
the zero crossings are (candidates for) edges.
- Multithreading type: reentrant (runs in parallel with non-exclusive operators).
- Multithreading scope: global (may be called from any thread).
- Automatically parallelized on tuple level.
- Automatically parallelized on domain level.
zero_crossingzero_crossingZeroCrossingzero_crossingZeroCrossingZeroCrossing usually returns the value 2 (H_MSG_TRUE). If
necessary, an exception is raised.
laplacelaplaceLaplacelaplaceLaplaceLaplace,
laplace_of_gausslaplace_of_gaussLaplaceOfGausslaplace_of_gaussLaplaceOfGaussLaplaceOfGauss,
derivate_gaussderivate_gaussDerivateGaussderivate_gaussDerivateGaussDerivateGauss
connectionconnectionConnectionconnectionConnectionConnection,
skeletonskeletonSkeletonskeletonSkeletonSkeleton,
boundaryboundaryBoundaryboundaryBoundaryBoundary,
select_shapeselect_shapeSelectShapeselect_shapeSelectShapeSelectShape,
fill_upfill_upFillUpfill_upFillUpFillUp
thresholdthresholdThresholdthresholdThresholdThreshold,
dual_thresholddual_thresholdDualThresholddual_thresholdDualThresholdDualThreshold,
zero_crossing_sub_pixzero_crossing_sub_pixZeroCrossingSubPixzero_crossing_sub_pixZeroCrossingSubPixZeroCrossingSubPix
Foundation