1. Image Processing Laboratory, University of Valencia - Burjassot-Paterna Campus, València, Spain
2. Institute of Bio- and Geosciences Plant Sciences, Forschungszentrum Jülich GmbH, Jülich, Germany
3. Secretary of Research and Postgraduate, Consejo Nacional de Ciencia y Tecnología, Universidad Autonoma de Nayarit, Tepic, Mexico