Hi All,<br>I want to know whether ITK implemented the GetDerivative() function of the class KullbackLeiblerCompareHistogramImageToImageMetric? If not, can any one kindly tell me how to implement the funcutions GetValue() and GetDerivative() for KullbackLeiblerCompareHistogramImgeToImageMetric? <br>
<br><br>Thanks a lot,<br>Ronald<br>