void ImageResizer::onInit() {
   raw_width_ = 0;
   raw_height_ = 0;
   DiagnosticNodelet::onInit();
   initParams();
   initReconfigure();
   initPublishersAndSubscribers();
   onInitPostProcess();
 }
 void ImageProcessing::onInit() {
   DiagnosticNodelet::onInit();
   initReconfigure();
   initParams();
   initPublishersAndSubscribers();
 }