A Real-World Grasping-in-Clutter Performance Evaluation Benchmark for Robotic Food Waste Sorting

TL;DR

This paper introduces GRAB, a comprehensive real-world benchmark for evaluating robotic grasping in cluttered food waste sorting, addressing existing limitations with diverse datasets and detailed failure analysis.

Contribution

The work presents a new benchmark incorporating diverse deformable objects, advanced grasp estimation, and explicit pre-grasp condition evaluation for food waste sorting.

Findings

Object quality is the dominant factor affecting grasp success.

Physical interaction constraints are the main cause of grasp failures.

Hierarchical analysis of graspability parameters reveals key performance influences.

Abstract

Food waste management is critical for sustainability, yet inorganic contaminants hinder recycling potential. Robotic automation accelerates sorting through automated contaminant removal. Nevertheless, the diverse and unpredictable nature of contaminants introduces major challenges for reliable robotic grasping. Grasp performance benchmarking provides a rigorous methodology for evaluating these challenges in underexplored field contexts like food waste sorting. However, existing approaches suffer from limited simulation datasets, over-reliance on simplistic metrics like success rate, inability to account for object-related pre-grasp conditions, and lack of comprehensive failure analysis. To address these gaps, this work introduces GRAB, a real-world grasping-in-clutter (GIC) performance benchmark incorporating: (1) diverse deformable object datasets, (2) advanced 6D grasp pose estimation, and (3) explicit evaluation of pre-grasp conditions through graspability metrics. The benchmark compares industrial grasping across three gripper modalities through 1,750 grasp attempts across four randomized clutter levels. Results reveal a clear hierarchy among graspability parameters, with object quality emerging as the dominant factor governing grasp performance across modalities. Failure mode analysis shows that physical interaction constraints, rather than perception or control limitations, constitute the primary source of grasp failures in cluttered environments. By enabling identification of dominant factors influencing grasp performance, GRAB provides a principled foundation for designing robust, adaptive grasping systems for complex, cluttered food waste sorting.