CNOS: A Strong Baseline for CAD-based Novel Object Segmentation

Tomas Hodan, Van Nguyen Nguyen, Thibault Groueix, Georgy Ponimatkin, Vincent Lepetit

Abstract: We propose a simple yet powerful method to segment novel objects in RGB images from their CAD models. Leveraging recent foundation models, Segment Anything and DINOv2, we generate segmentation proposals in the input image and match them against object templates that are pre-rendered using the CAD models. The matching is realized by comparing DINOv2 cls tokens of the proposed regions and the templates. The output of the method is a set of segmentation masks associated with per-object confidences defined by the matching scores. We experimentally demonstrate that the proposed method achieves state-of-the-art results in CAD-based novel object segmentation on the seven core datasets of the BOP challenge, surpassing the recent method of Chen et al. by absolute 19.8% AP.