ImgAutoThreshold

Prototype

intThresholdUsed:=ImgAutoThreshold (intImageHandle, intThresholdMethod)

Description

Thresholds a grayscale image by automatically calculating the best threshold level. The threshold level is used globally and can be calculated using several algorithms.

Parameters

intImageHandle: integer value corresponding to the image handle.

intThresholdMethod: it specifies thresholding algorithm. Allowed values are:

0  =  Otsu

1  =  Lloyd

2  =  Ridler-Calvard

3  =  Uniform Error

4  =  Standard Deviation

  5  =  Clustering

6  =  Median

Returned value

The calculated threshold value from 0 - 255 used for binarization.

Note

See ImgThreshold, ImgAdvancedThreshold and ImgDynamicThreshold for alternative threshold methods.

Example

// Applies auto thresholding using the Lloyd algorithm

ImgAutoThreshold(_CurrentImage,1);