int xMin, xMax, yMin, yMax, zMin, zMax;
bbGetInputIn()->GetExtent(xMin, xMax, yMin, yMax, zMin, zMax);
if ( image != bbGetInputIn()){//bbGetInputStatus("In") != bbtk::UPTODATE ){
// Input image has changed : reinitialize planes
image = bbGetInputIn();
int xMin, xMax, yMin, yMax, zMin, zMax;
bbGetInputIn()->GetExtent(xMin, xMax, yMin, yMax, zMin, zMax);
if ( image != bbGetInputIn()){//bbGetInputStatus("In") != bbtk::UPTODATE ){
// Input image has changed : reinitialize planes
image = bbGetInputIn();