Use Dimensions methods instead of creating arrays

Author: tpietzsch

src/main/java/net/imglib2/algorithm/metrics/segmentation/MultiMetrics.java

@@ -339,7 +339,7 @@ public static < I extends IntegerType< I >, J extends IntegerType< J > > HashMap
 
 		// check if it is a time-lapse
 		boolean timeLapse = false;
-		if ( groundTruth.dimensionsAsLongArray().length > T_AXIS )
+		if ( groundTruth.numDimensions() > T_AXIS )
 		{
 			timeLapse = groundTruth.dimension( T_AXIS ) > 1;
 		}
@@ -377,7 +377,7 @@ protected static < I extends IntegerType< I >, J extends IntegerType< J > > Metr
 			RandomAccessibleInterval< J > prediction,
 			double threshold )
 	{
-		int nFrames = Intervals.dimensionsAsIntArray( groundTruth )[ T_AXIS ];
+		int nFrames = ( int ) groundTruth.dimension( T_AXIS );
 
 		final MetricsSummary metrics = new MetricsSummary();
 

src/main/java/net/imglib2/algorithm/metrics/segmentation/SEGMetrics.java

@@ -130,7 +130,7 @@ public static < I extends IntegerType< I >, J extends IntegerType< J > > double
 
 		// check if it is a time-lapse
 		boolean timeLapse = false;
-		if ( groundTruth.dimensionsAsLongArray().length > T_AXIS )
+		if ( groundTruth.numDimensions() > T_AXIS )
 		{
 			timeLapse = groundTruth.dimension( T_AXIS ) > 1;
 		}
@@ -150,7 +150,7 @@ private static < I extends IntegerType< I >, J extends IntegerType< J > > double
 			RandomAccessibleInterval< I > groundTruth,
 			RandomAccessibleInterval< J > prediction )
 	{
-		int nFrames = Intervals.dimensionsAsIntArray( groundTruth )[ T_AXIS ];
+		int nFrames = ( int ) groundTruth.dimension( T_AXIS );
 
 		double sumScores = 0.;
 		double nGT = 0.;