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Lahore University of Management Sciences

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Selected work

Representative Papers

Automated Borehole Core Analysis with Report-Derived Weak Labels and Supervised Crack Segmentation

Aug 12, 2026

This study addresses the challenge posed by the absence of pixel-level fracture annotations in core images, which hinders automated extraction of fracture spacing and associated geological features. To overcome this limitation, the authors propose a multimodal weakly supervised learning framework that leverages digital log reports to generate weak labels for fracture spacing classification and integrates these with limited human-annotated strong labels to train a fully supervised segmentation model. The approach innovatively incorporates a learnable spatial gating mechanism, combining a DINO self-supervised encoder, PiDiNet for edge detection, and Mask R-CNN for instance segmentation, alongside rule-based modules for estimating bedding angle and lithology color. Experimental results demonstrate a fracture segmentation F1 score of 0.860 (IoU 0.754), with bedding angle and lithology color predictions achieving 75.4% and 84.7% consistency, respectively, with expert log reports.

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Recent publications

Latest Papers

Automated Borehole Core Analysis with Report-Derived Weak Labels and Supervised Crack Segmentation

Aug 12, 2026

This study addresses the challenge posed by the absence of pixel-level fracture annotations in core images, which hinders automated extraction of fracture spacing and associated geological features. To overcome this limitation, the authors propose a multimodal weakly supervised learning framework that leverages digital log reports to generate weak labels for fracture spacing classification and integrates these with limited human-annotated strong labels to train a fully supervised segmentation model. The approach innovatively incorporates a learnable spatial gating mechanism, combining a DINO self-supervised encoder, PiDiNet for edge detection, and Mask R-CNN for instance segmentation, alongside rule-based modules for estimating bedding angle and lithology color. Experimental results demonstrate a fracture segmentation F1 score of 0.860 (IoU 0.754), with bedding angle and lithology color predictions achieving 75.4% and 84.7% consistency, respectively, with expert log reports.

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