GelSlim 5.0: Unifying Vision and Touch with a Single Fingertip Camera

GelSlim 5.0 uses one fixed fingertip camera and a UV-responsive contact layer to capture visual and tactile images sequentially by switching illumination. The VisTacFusion transformer estimates planar object pose and contact depth and surface normals, with modality dropout supporting paired or single-modality inputs. On real validation data from 12 known objects, paired inputs reduced depth MSE by 61.2% versus tactile-only inference and 93.7% versus visual-only inference.