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#@Dataset(label="Image to transform") img | |
#@Double(label="scale") scaling_factor | |
#@UIService ui | |
import net.imglib2.*; | |
import net.imglib2.realtransform.*; | |
import net.imglib2.view.*; | |
import net.imglib2.interpolation.*; | |
import net.imglib2.interpolation.randomaccess.*; | |
int nd = img.numDimensions(); | |
RealPoint p = new RealPoint(nd); | |
long N = 0; | |
c = img.cursor(); | |
while( c.hasNext()) | |
{ | |
if ( c.next().getRealDouble() > 0 ) | |
{ | |
N++; | |
for( int i = 0; i < nd; i++ ) | |
p.setPosition( p.getDoublePosition( i ) + c.getDoublePosition( i ), i ); | |
} | |
} | |
for( int i = 0; i < nd; i++ ) | |
p.setPosition( p.getDoublePosition( i ) / N, i ); | |
center = new double[ nd ]; | |
p.localize( center ); | |
t = new AffineTransform3D(); // centering part | |
t.translate( center ); | |
transform = new AffineTransform3D(); | |
transform.preConcatenate( t.inverse() ); // center about zero | |
transform.scale( scaling_factor ); // scale | |
transform.preConcatenate( t ); // un-center | |
interp = new NearestNeighborInterpolatorFactory() | |
result = Views.interval( | |
Views.raster( | |
RealViews.transform( | |
Views.interpolate( Views.extendZero( img ), interp), | |
transform )), | |
img ); | |
ui.show( "transformed", result ) |
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