Line Segment-Based Stitched Multipanel Figure Separation for Effective Biomedical CBIR.

KC S, Aafaque A, Antani SK, Thoma GR
Int. J. Patt. Recogn. Artif. Intelligence 31, 1757003 (2017)

We present a novel technique to separate panels from stitched multipanel figures appearing in biomedical research articles. Since such figures may comprise images from different imaging modalities, separating them is a crucial first step for effective biomedical content-based image retrieval (CBIR): multimodal biomedical document classification and/or retrieval, for instance. The method applies local line segment detection based on the gray-level pixel changes. It then applies a line vectorization process that connects prominent broken lines along the panel boundaries while eliminating insignificant line segments within the panels.