Expert Systems with Applications: An International Journal
Computers and Industrial Engineering
Micro-crack inspection in heterogeneously textured solar wafers using anisotropic diffusion
Image and Vision Computing
Defect Detection and Classification in Citrus Using Computer Vision
ICONIP '09 Proceedings of the 16th International Conference on Neural Information Processing: Part II
Fabric defect classification using radial basis function network
Pattern Recognition Letters
An approach for extracting illumination-independent texture features
ICIAR'07 Proceedings of the 4th international conference on Image Analysis and Recognition
Performance analysis of colour descriptors for parquet sorting
Expert Systems with Applications: An International Journal
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Continued increases in the cost of materials and labor make it imperative for furniture manufacturers to control costs by improved yield and increased productivity. This paper describes an Automated Lumber Processing System (ALPS) that employs computer tomography, optical scanning technology, the calculation of an optimum cutting strategy, and a computer-driven laser cutting device. While certain major hardware components of ALPS are already commercially available, a major missing element is the automatic inspection system needed to locate and identify surface defects on boards. This paper reports research aimed at developing such an inspection system. The basic strategy is to divide the digital image of a board into a number of disjoint rectangular regions and classify each independently. This simple procedure has the advantage of allowing an obvious parallel processing implementation. The study shows that measures of tonal and pattern related qualities are needed. The tonal measures are the mean, variance, skewness, and kurtosis of the gray levels. The pattern related measures are those based on cooccurrence matrices. In this initial feasibility study, these combined measures yielded an overall 88.3 percent correct classification on the eight defects most commonly found in lumber. To minimize the number of calculations needed to make the required classifications a sequential classifier is proposed.