Optimize combinations of various neural network models for multimodal data with bayseian optimization.

A **Panoptic FPN** is an extension of an [FPN](https://paperswithcode.com/method/fpn) that can generate both instance and semantic segmentations via FPN. The approach starts with an FPN backbone and adds a branch for performing semantic segmentation in parallel with the existing region-based branch for instance segmentation. No changes are made to the FPN backbone when adding the dense-prediction branch, making it compatible with existing instance segmentation methods. 

The new semantic segmentation branch achieves its goal as follows. Starting from the deepest FPN level (at 1/32 scale), we perform three upsampling stages to yield a feature map at 1/4 scale, where each upsampling stage consists of 3×3 [convolution](https://paperswithcode.com/method/convolution), group norm, [ReLU](https://paperswithcode.com/method/relu), and 2× bilinear upsampling. This strategy is repeated for FPN scales 1/16, 1/8, and 1/4 (with progressively fewer upsampling stages). The result is a set of feature maps at the same 1/4 scale, which are then element-wise summed. A final 1×1 convolution, 4× bilinear upsampling, and [softmax](https://paperswithcode.com/method/softmax) are used to generate the per-pixel class labels at the original image resolution. In addition to stuff classes, this branch also outputs a special ‘other’ class for all pixels belonging to objects (to avoid predicting stuff classes for such pixels).

Panoptic FPN

Panoptic Feature Pyramid Networks

HyperTree MetaModel

The CoSTAR Block Stacking Dataset: Learning with Workspace Constraints

**Gated Positional Self-Attention (GPSA)** is a self-attention module for vision transformers, used in the [ConViT](https://paperswithcode.com/method/convit) architecture, that can be initialized as a convolutional layer -- helping a ViT learn inductive biases about locality.

Source	The CoSTAR Block Stacking Dataset: Learning with Workspace Constraints
Year	2000
Data Source	CC BY-SA - https://paperswithcode.com