EasyImage::HistogramThreshold
Determines an appropriate threshold level based on the histogram contents, using an automatic threshold mode.
Namespace: Euresys::Open_eVision
[C++]
void HistogramThreshold(
EBWHistogramVector* histogram,
OEV_UINT32& threshold,
float& averageOfPixelsBelowThreshold,
float& averageOfPixelsAboveThreshold,
float relativeThreshold,
OEV_UINT32 from,
OEV_UINT32 to
)
Parameters
histogram
Pointer to a vector conaining an image histogram.
threshold
reference to the threshold value. Before calling the function, must be set to the appropriate thresholding mode, as defined by EThresholdMode.
averageOfPixelsBelowThreshold
Average gray level of the dark pixels (below threshold).
averageOfPixelsAboveThreshold
Average gray level of the light pixels (above threshold).
relativeThreshold
Relative threshold value, relevant only in the EThresholdMode_Relative mode.
from
Lower bound of the analyzed gray-level range.
to
Upper bound of the analyzed gray-level range.
Remarks
Additionally, returns the average gray levels in the regions below and above the threshold. The threshold level can be computed by analyzing a range of gray levels in the histogram.
EasyImage.HistogramThreshold
Determines an appropriate threshold level based on the histogram contents, using an automatic threshold mode.
Namespace: Euresys.Open_eVision
[C#]
void HistogramThreshold(
Euresys.Open_eVision.EBWHistogramVector histogram,
ref uint threshold,
out float averageOfPixelsBelowThreshold,
out float averageOfPixelsAboveThreshold,
float relativeThreshold,
uint from,
uint to
)
Parameters
histogram
Pointer to a vector conaining an image histogram.
threshold
reference to the threshold value. Before calling the function, must be set to the appropriate thresholding mode, as defined by EThresholdMode.
averageOfPixelsBelowThreshold
Average gray level of the dark pixels (below threshold).
averageOfPixelsAboveThreshold
Average gray level of the light pixels (above threshold).
relativeThreshold
Relative threshold value, relevant only in the Relative mode.
from
Lower bound of the analyzed gray-level range.
to
Upper bound of the analyzed gray-level range.
Remarks
Additionally, returns the average gray levels in the regions below and above the threshold. The threshold level can be computed by analyzing a range of gray levels in the histogram.