**Single-Shot Multi-Object Tracker** or **SMOT**, is a tracking framework that converts any single-shot detector (SSD) model into an online multiple object tracker, which emphasizes simultaneously detecting and tracking of the object paths. Contrary to the existing tracking by detection approaches which suffer from errors made by the object detectors, SMOT adopts the recently proposed scheme of tracking by re-detection.

The proposed SMOT consists of two stages. The first stage generates temporally consecutive tracklets by exploring the temporal and spatial correlations from previous frame. The second stage performs online linking of the tracklets to generate a face track for each person (better view in color).

A **Global Convolutional Network**, or **GCN**, is a semantic segmentation building block that utilizes a large kernel to help perform classification and localization tasks simultaneously. It can be used in a [FCN](https://paperswithcode.com/method/fcn)-like structure, where the [GCN](https://paperswithcode.com/method/gcn) is used to generate semantic score maps. Instead of directly using larger kernels or global [convolution](https://paperswithcode.com/method/convolution), the GCN module employs a combination of $1 \times k + k \times 1$ and $k \times 1 + 1 \times k$ convolutions, which enables [dense connections](https://paperswithcode.com/method/dense-connections) within a large
$k\times{k}$ region in the feature map

Global Convolutional Network

Large Kernel Matters -- Improve Semantic Segmentation by Global Convolutional Network

SMOT

SMOT: Single-Shot Multi Object Tracking

**Hardtanh** is an activation function used for neural networks:

$$ f\left(x\right) = -1 \text{ if } x < - 1 $$
$$ f\left(x\right) = x \text{ if } -1 \leq x \leq 1 $$
$$ f\left(x\right) = 1 \text{ if } x > 1 $$

It is a cheaper and more computationally efficient version of the [tanh activation](https://paperswithcode.com/method/tanh-activation).

Image Source: [Zhuan Lan](https://zhuanlan.zhihu.com/p/30385380)

Source	SMOT: Single-Shot Multi Object Tracking
Year	2000
Data Source	CC BY-SA - https://paperswithcode.com