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HysteresisThreshold

HysteresisThreshold[img, {t_L, t_U}] returns img with every value above the upper threshold t_U set to 1 and values between t_U and t_L that are connected (i.e., adjacent) to a high value also set to 1.

HysteresisThreshold (also known as a double threshold) is a method of improving the result of thresholding an image when a single global threshold value gives unsatisfactory results. This occurs in cases when the background and foregound have regions of approximately same gray level.

The argument img may be a list or ImageData expression.

See also User's Guide 7.2.

New in Version 2.

Example

This loads the package.

In[1]:=

Here is some data with three peaks.

In[2]:=

This returns all the samples with values greater then 3 but only if they are connected to a sample with value greater than 5.

In[3]:=

Out[3]=

THIS IS DOCUMENTATION FOR AN OBSOLETE PRODUCT.

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