**PGNet** is a point-gathering network for reading arbitrarily-shaped text in real-time. It is a single-shot text spotter, where the pixel-level character classification map is learned with proposed PG-CTC loss avoiding the usage of character-level annotations. With a PG-CTC decoder, we gather high-level character classification vectors from two-dimensional space and decode them into text symbols without NMS and RoI operations involved, which guarantees high efficiency. Additionally, reasoning the relations between each character and its neighbors, a graph refinement module (GRM) is proposed to optimize the coarse recognition and improve the end-to-end performance.

**VC R-CNN** is an unsupervised feature representation learning method, which uses Region-based Convolutional Neural Network ([R-CNN](https://paperswithcode.com/method/r-cnn)) as the visual backbone, and the causal intervention as the training objective. Given a set of detected object regions in an image (e.g., using [Faster R-CNN](https://paperswithcode.com/method/faster-r-cnn)), like any other unsupervised feature learning methods (e.g., word2vec), the proxy training objective of VC R-CNN is to predict the contextual objects of a region. However, they are fundamentally different: the prediction of VC R-CNN is by using causal intervention: P(Y|do(X)), while others are by using the conventional likelihood: P(Y|X). This is also the core reason why VC R-CNN can learn "sense-making" knowledge like chair can be sat -- while not just "common" co-occurrences such as the chair is likely to exist if table is observed.

VC R-CNN

Visual Commonsense R-CNN

PGNet

PGNet: Real-time Arbitrarily-Shaped Text Spotting with Point Gathering Network

**Elastic Dense Block** is a skip connection block that modifies the [Dense Block](https://paperswithcode.com/method/dense-block) with downsamplings and upsamplings in parallel branches at each layer to let the network learn from a data scaling policy in which inputs are processed at different resolutions in each layer. It is called "elastic" because each layer in the network is flexible in terms of choosing the best scale by a soft policy.

Source	PGNet: Real-time Arbitrarily-Shaped Text Spotting with Point Gathering Network
Year	2000
Data Source	CC BY-SA - https://paperswithcode.com