Theses and Dissertations


Issuing Body

Mississippi State University


Shmulsky, Rubin

Committee Member

Stokes, Beth

Committee Member

Burgreen, Greg

Date of Degree


Document Type

Graduate Thesis - Open Access


Sustainable Bioproducts

Degree Name

Master of Science (M.S.)


College of Forest Resources


Department of Sustainable Bioproducts


The current method for estimating wood failure is highly subjective. Various techniques have been proposed to improve the current protocol, but none have succeeded. This research aims to use deep learning/semantic segmentation using SegNet architecture to estimate wood failure in four types of three-ply plywood from mechanical shear strength specimens. We trained and tested our approach on custom and commercial plywood with bio-based and phenol-formaldehyde adhesives. Shear specimens were prepared and tested. Photographs of 255 shear bonded areas were taken. Forty photographs were used to solicit visual estimates from five human evaluators, and the remaining photographs were used to train the machine learning models. Twelve models were trained with the combination of four image sizes and three dataset splits. In comparison to visual estimates, the model trained on 512 × 512 image size with 90/10 dataset split had a mean absolute error (MAE) of 6%, which was the best among the literature.


Mississippi State University