GetThresholdParameters Method

Description

Gets the current thresholding parameters

Return Type

None

Syntax

object.GetThresholdParameters Method, NumberOfPhases, TrimLeftPercent, TrimRightPercent, MethodDependent

The GetThresholdParameters Method syntax has these parts:

Part	Description
object	An expression evaluating to an object of type McHistogram.
Method	Required. A mcHistThresholdsMethod enumeration, as described in settings. The Method and flags is placed in this variable.
NumberOfPhases	Required. A Long value. The NumberOfPhases is placed in this variable.
TrimLeftPercent	Required. A Double value. The TrimLeftPercent is placed in this variable.
TrimRightPercent	Required. A Double value. The TrimRightPercent is placed in this variable.
MethodDependent	Required. A Double value. Any Method dependent parameter is placed in this variable.

Settings

The settings for Method are:

Constant		Value	Description
	mchmCurrentMethod	0	Whatever method was already set.
	mchmMinimumVarianceMethod	1	The ratio of between-phase to total variance is minimized (method of Otsu). Works with either two or three phases. This is the default method if SetThresholdParameters has not been called.
	mchmLegacyIPP4Method	2	A version of MinimumVariant with a bias towards low values. works with two phases only.
	mchmTrimmedHistogramMethod	3	Three phases are computed, based on the TrimLeftPercent and TrimRightPercent arguments to SetThresholdParameters. Phase 0 is the leftmost, trimmed section of the histogram, Phase 1 is the middle section between the trimmed portions, and Phase 2 is the rightmost, trimmed section of the histogram. If only two phases are set as the NumberOfPhases, then only the left two are available.
	mchmMaskMethods	255	mask for the mchtmXxxxMethod values
	mchmIgnoreBlack	4096	Pixels in the leftmost bin are not included in the threshold computations, allowing you to ignore under illuminanted regions.
	mchmIgnoreWhite	8192	Pixels in the rightmost bin are not included in the threshold computations, allowing you to ignore oversaturated regions.

Remarks

Thresholding parameters may be set by a call to the SetThresholdParameters method.