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CvInvokeThreshold Method
http://www.emgu.com
Applies fixed-level thresholding to single-channel array. The function is typically used to get bi-level (binary) image out of grayscale image (cvCmpS could be also used for this purpose) or for removing a noise, i.e. filtering out pixels with too small or too large values. There are several types of thresholding the function supports that are determined by threshold_type

Namespace: Emgu.CV
Assembly: Emgu.CV.World (in Emgu.CV.World.dll) Version: 3.2.0.2682 (3.2.0.2682)
Syntax
public static double Threshold(
	IInputArray src,
	IOutputArray dst,
	double threshold,
	double maxValue,
	ThresholdType thresholdType
)

Parameters

src
Type: Emgu.CVIInputArray
Source array (single-channel, 8-bit of 32-bit floating point).
dst
Type: Emgu.CVIOutputArray
Destination array; must be either the same type as src or 8-bit.
threshold
Type: SystemDouble
Threshold value
maxValue
Type: SystemDouble
Maximum value to use with CV_THRESH_BINARY and CV_THRESH_BINARY_INV thresholding types
thresholdType
Type: Emgu.CV.CvEnumThresholdType
Thresholding type

Return Value

Type: Double

[Missing <returns> documentation for "M:Emgu.CV.CvInvoke.Threshold(Emgu.CV.IInputArray,Emgu.CV.IOutputArray,System.Double,System.Double,Emgu.CV.CvEnum.ThresholdType)"]

See Also