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Updated: Mar 24, 2026

Estimation of Contact Regions Between Hands and Objects During Human Multi-Digit Grasping
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Figure/Ground Segmentation via a Haptic Glance: Attributing Initial Finger Contacts to Objects or Their Supporting

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    Humans can distinguish objects from backgrounds using touch, even with a brief "haptic glance." Kinetic, geometric, and material factors influence this tactile figure/ground perception.

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    Area of Science:

    • Psychology
    • Neuroscience
    • Haptic Perception

    Background:

    • The figure/ground problem is crucial in visual perception but understudied in haptics.
    • Natural scenes present ambiguity, and initial touch provides limited sensory input.

    Purpose of the Study:

    • To investigate if humans can differentiate tactile figure from ground with limited sensory input.
    • To classify the influence of kinetic, geometric, and material factors on haptic figure/ground segmentation.

    Main Methods:

    • Experiments assessed participants' subjective certainty in distinguishing figure from ground.
    • A tripartite classification scheme evaluated kinetic, geometric, and material influences.
    • Subjective responses provided qualitative data on haptic segmentation.

    Main Results:

    • Humans can segment figure from ground via a haptic glance under specific conditions.
    • Kinetic, geometric, and material factors significantly influence haptic figure/ground perception.
    • These factors affect the likelihood of identifying objects versus background structures.

    Conclusions:

    • Tactile figure/ground segmentation is possible with brief fingertip contacts.
    • Understanding these factors enhances models of haptic object recognition.
    • This research bridges a gap in the study of tactile perception.