@InProceedings{IPC2018_JF, author="Fastowicz, Jaros{\l}aw and Okarma, Krzysztof", editor="Chora{\'{s}}, Micha{\l} and Chora{\'{s}}, Ryszard S.", title="Automatic Colour Independent Quality Evaluation of 3D Printed Flat Surfaces Based on CLAHE and Hough Transform", booktitle="Image Processing and Communications Challenges 10", year="2019", publisher="Springer International Publishing", address="Cham", pages="123--131", abstract="In this paper a novel approach to quality evaluation of flat surfaces of the 3D printed objects has been discussed. The proposed approach utilizes the regularity of the layers visible on the printed surfaces which are extracted using Hough transform. Nevertheless, due to the variety of filament's colours, the application of a single metric which can be automatically computed, being equivalent to perceived surface quality, requires the additional preprocessing operations. For this purpose Contrast Limited Adaptive Histogram Equalization (CLAHE) has been used together with additional compensation of the metric for bright filaments. Achieved results for the database of 88 scanned samples are encouraging and allow a reliable quality assessment of 3D surfaces for various filaments.", isbn="978-3-030-03658-4" }