de Sá, F. P., Aguilera, C., Aguilera, C. A., & Conci, A. (2022). Melamine Faced Panel Inspection, Towards an Efficient Use of Natural Resources. In ICT Applications for Smart Cities (pp. 165-183). Springer, Cham.
Today an adequate use of natural resources respecting the extraction, transformation, and consumption limits considering that we live in an already lacking in natural reserves planet is paramount. The growing environmental consciousness inserted in the new economy encourages the industry to adopt new technologies in order to optimize production processes. The timber industry deals with a feed-stock sensitive to environmental appeals, which demand tight control over the origin of the processed wood. The adoption of automatic and non-destructive techniques to find defects in wood products improve the use of several natural resources such as soil, water, and others environmental provisions. In this work, we present a new image processing technique for quality control tasks of melamine boards. This only uses information from one channel acquired in the near-infrared spectrum. We carry out a classification study of defects present in the manufacture of melamine boards. We consider the most important type of defects: stains, paper (displacement or) detachment, (paper wrapped or) attached material, wrinkled paper, and folded paper. Each type of defects presents different cardinalities, demanding a number of considerations for set normalization and definition of proper techniques for adjustments in the data mining process of unbalanced sets. The results outperform the literature’s previous work on the classification of defects of the same type of boards.