EasyImage::ThreeLevelsMinResidueThreshold
Computes the two threshold values used to separate the pixels of an image in three classes.
Namespace: Euresys::Open_eVision
[C++]
float ThreeLevelsMinResidueThreshold(
EBWHistogramVector* histogram,
EBW8& firstGrayPixelValue,
EBW8& firstWhitePixelValue,
float& averageBlack,
float& averageGray,
float& averageWhite
)
Parameters
histogram
Histogram of the image.
firstGrayPixelValue
Low threshold.
firstWhitePixelValue
High threshold.
averageBlack
Average value of the black pixels (pixels under the low threshold).
averageGray
Average value of the gray pixels (pixels between the low threshold and the high threshold).
averageWhite
Average value of the white pixels (pixels over the high threshold).
Remarks
These values are computed using the minimum residue criterion from the histogram of the image. The function returns the minimum residue as per the method. The residue is the Euclidian distance between the source image and the thresholded image.
EasyImage.ThreeLevelsMinResidueThreshold
Computes the two threshold values used to separate the pixels of an image in three classes.
Namespace: Euresys.Open_eVision
[C#]
float ThreeLevelsMinResidueThreshold(
Euresys.Open_eVision.EBWHistogramVector histogram,
out Euresys.Open_eVision.EBW8 firstGrayPixelValue,
out Euresys.Open_eVision.EBW8 firstWhitePixelValue,
out float averageBlack,
out float averageGray,
out float averageWhite
)
Parameters
histogram
Histogram of the image.
firstGrayPixelValue
Low threshold.
firstWhitePixelValue
High threshold.
averageBlack
Average value of the black pixels (pixels under the low threshold).
averageGray
Average value of the gray pixels (pixels between the low threshold and the high threshold).
averageWhite
Average value of the white pixels (pixels over the high threshold).
Remarks
These values are computed using the minimum residue criterion from the histogram of the image. The function returns the minimum residue as per the method. The residue is the Euclidian distance between the source image and the thresholded image.