get derivative of image metric

antsrMetricGetDerivative(metric)

Arguments

metric

an 'antsrMetric'

Value

image similarity value

Examples

x = antsImageRead( getANTsRData( 'r16' )) y = antsImageRead( getANTsRData( 'r30' )) metric = antsrMetricCreate(x,y,type="MeanSquares") tx <- createAntsrTransform( precision="double", type="AffineTransform", dimension=2) setAntsrTransformParameters(tx, c(0,-1,1,0,0,0)) setAntsrTransformFixedParameters(tx, c(128,128)) antsrMetricSetMovingTransform(metric, tx)
#> antsrMetric_SetTransform()
metricValue = antsrMetricGetDerivative(metric)