|| (message.getColumnCount() != _imageColumns)) {
throw new IllegalActionException("Input data must be imageRows "
+ "by imageColumns");
}
int[][] image = message.intMatrix();
for (j = 0, partitionNumber = 0; j < _imageRows; j += _partitionRows) {
for (i = 0; i < _imageColumns; i += _partitionColumns, partitionNumber++) {
for (y = 0; y < _partitionRows; y++) {
System.arraycopy(image[j + y], i, _part[y], 0,