Author

V. Yendapalli

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Open access Oct 2026

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 in Al-7075, and evaluates whether gray-...

Shilpa Karegoudra, V. Yendapalli · Engineer · 0 citations

Open access Oct 2026

Machine Learning-Based Surface Roughness Prediction of Drilled Hole Surfaces Using Texture and Chip Morphology Features

A Streamlit-based interface enables real-time, non-contact prediction at ~45 ms per image, reducing inspection time, cost, and reliance on contact methods.

Shilpa Karegoudra, V. Yendapalli · Engineering, Technology &amp... · 0 citations