$rc = $handle->writeImage( "./tmp/tmp.file_small");
if ( !$this->original ) {
$handle->readImage("./tmp/tmp.file_org");
$bigheight = floor($this->bigwidth * $faktor);
$rc = $handle->writeImage( "./tmp/tmp.file_small");
if ( !$this->original ) {
$handle->readImage("./tmp/tmp.file_org");
$bigheight = floor($this->bigwidth * $faktor);