Vamsidhar Yendapalli

Non-Contact Image-Based Roughness Estimation of Drilled Holes: Imaging Setup, Ground-Truth Dataset and Leakage-Free Evaluation of GLCM and Wavelet Features

Surface roughness (Ra) of drilled hole walls is difficult to measure non-destructively because the recessed surface is inaccessible to a stylus unless the workpiece is sectioned. This study presents an imaging rig and a stylus ground-truth procedure for 150 holes (4–9 mm) drilled...