PerSense: Personalized Instance Segmentation in Dense Images

The emergence of foundational models has significantly advanced segmentation approaches. However, existing models still face challenges in automatically segmenting personalized instances in dense scenarios, where severe occlusions, scale variations, and background clutter hinder precise instance delineation. To address this, we propose PerSense, an end-to-end, training-free, and model-agnostic one-shot framework for personalized instance segmentation in dense images. We start with developing a new baseline capable of automatically generating instance-level point prompts via proposing a novel Instance Detection Module (IDM) that leverages density maps, encapsulating spatial distribution of objects in an image. To reduce false positives, we design the Point Prompt Selection Module (PPSM), which refines the output of IDM based on an adaptive threshold. Both IDM and PPSM seamlessly integrate into our model-agnostic framework. Furthermore, we introduce a feedback mechanism which enables PerSense to improve the accuracy of density maps by automating the exemplar selection process for density map generation. Finally, to promote algorithmic advances and effective tools for this relatively underexplored task, we introduce PerSense-D, an evaluation benchmark exclusive to personalized instance segmentation in dense images. Our extensive experiments establish PerSense superiority in dense scenarios compared to SOTA approaches. Additionally, our qualitative findings demonstrate the adaptability of our framework to images captured in-the-wild.

@article{siddiqui2025_2405.13518,
  title={ PerSense: Personalized Instance Segmentation in Dense Images },
  author={ Muhammad Ibraheem Siddiqui and Muhammad Umer Sheikh and Hassan Abid and Muhammad Haris Khan },
  journal={arXiv preprint arXiv:2405.13518},
  year={ 2025 }
}