The ability to detect objects in images at varying scales has played a pivotal role in the design of modern object detectors. Despite considerable progress in removing handcrafted components using transformers, multi-scale feature maps remain a key factor for their empirical success, even with a plain backbone like the Vision Transformer (ViT). In this paper, we show that this reliance on feature pyramids is unnecessary and a transformer-based detector with scale-aware attention enables the plain detector `SimPLR' whose backbone and detection head both operate on single-scale features. The plain architecture allows SimPLR to effectively take advantages of self-supervised learning and scaling approaches with ViTs, yielding strong performance compared to multi-scale counterparts. We demonstrate through our experiments that when scaling to larger backbones, SimPLR indicates better performance than end-to-end detectors (Mask2Former) and plain-backbone detectors (ViTDet), while consistently being faster. The code will be released.

通过在单一尺度特征上操作，基于Transformer的检测器SimPLR能够利用自监督学习和缩放方法，相对于多尺度对应物和纯主干结构检测器具有更强的性能，并且速度更快。

SimPLR: 一个简单直接的Transformer用于目标检测和分割