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# Gitea # Gitea
[![](https://github.com/go-gitea/gitea/actions/workflows/release-nightly.yml/badge.svg?branch=main)](https://github.com/go-gitea/gitea/actions/workflows/release-nightly.yml?query=branch%3Amain "Release Nightly") [![](https://github.com/go-gitea/gitea/actions/workflows/release-nightly.yml/badge.svg?branch=main)](https://github.com/go-gitea/gitea/actions/workflows/release-nightly.yml?query=branch%3Amain "Release Nightly")
[![](https://img.shields.io/discord/322538954119184384.svg?logo=discord&logoColor=white&label=Discord&color=5865F2)](https://discord.gg/Gitea "Join the Discord chat at https://discord.gg/Gitea") [![](https://img.shields.io/discord/322538954119184384.svg?logo=discord&logoColor=white&label=Discord&color=5865F2)](https://discord.gg/Gitea "Join the Discord chat at https://discord.gg/Gitea")
[![](https://goreportcard.com/badge/code.gitea.io/gitea)](https://goreportcard.com/report/code.gitea.io/gitea "Go Report Card") [![](https://goreportcard.com/badge/code.gitea.io/gitea)](https://goreportcard.com/report/code.gitea.io/gitea "Go Report Card")
[![](https://pkg.go.dev/badge/code.gitea.io/gitea?status.svg)](https://pkg.go.dev/code.gitea.io/gitea "GoDoc") [![](https://pkg.go.dev/badge/code.gitea.io/gitea?status.svg)](https://pkg.go.dev/code.gitea.io/gitea "GoDoc")
[![](https://img.shields.io/github/release/go-gitea/gitea.svg)](https://github.com/go-gitea/gitea/releases/latest "GitHub release") [![](https://img.shields.io/github/release/go-gitea/gitea.svg)](https://github.com/go-gitea/gitea/releases/latest "GitHub release")
[![](https://www.codetriage.com/go-gitea/gitea/badges/users.svg)](https://www.codetriage.com/go-gitea/gitea "Help Contribute to Open Source") [![](https://www.codetriage.com/go-gitea/gitea/badges/users.svg)](https://www.codetriage.com/go-gitea/gitea "Help Contribute to Open Source")
[![](https://opencollective.com/gitea/tiers/backers/badge.svg?label=backers&color=brightgreen)](https://opencollective.com/gitea "Become a backer/sponsor of gitea") [![](https://opencollective.com/gitea/tiers/backers/badge.svg?label=backers&color=brightgreen)](https://opencollective.com/gitea "Become a backer/sponsor of gitea")
[![](https://img.shields.io/badge/License-MIT-blue.svg)](https://opensource.org/licenses/MIT "License: MIT") [![](https://img.shields.io/badge/License-MIT-blue.svg)](https://opensource.org/licenses/MIT "License: MIT")
[![Contribute with Gitpod](https://img.shields.io/badge/Contribute%20with-Gitpod-908a85?logo=gitpod&color=green)](https://gitpod.io/#https://github.com/go-gitea/gitea) [![Contribute with Gitpod](https://img.shields.io/badge/Contribute%20with-Gitpod-908a85?logo=gitpod&color=green)](https://gitpod.io/#https://github.com/go-gitea/gitea)
[![](https://badges.crowdin.net/gitea/localized.svg)](https://translate.gitea.com "Crowdin") [![](https://badges.crowdin.net/gitea/localized.svg)](https://translate.gitea.com "Crowdin")
[繁體中文](./README.zh-tw.md) | [简体中文](./README.zh-cn.md) [繁體中文](./README.zh-tw.md) | [简体中文](./README.zh-cn.md)
## Purpose ## Purpose
The goal of this project is to make the easiest, fastest, and most The goal of this project is to make the easiest, fastest, and most
painless way of setting up a self-hosted Git service. painless way of setting up a self-hosted Git service.
As Gitea is written in Go, it works across **all** the platforms and As Gitea is written in Go, it works across **all** the platforms and
architectures that are supported by Go, including Linux, macOS, and architectures that are supported by Go, including Linux, macOS, and
Windows on x86, amd64, ARM and PowerPC architectures. Windows on x86, amd64, ARM and PowerPC architectures.
This project has been This project has been
[forked](https://blog.gitea.com/welcome-to-gitea/) from [forked](https://blog.gitea.com/welcome-to-gitea/) from
[Gogs](https://gogs.io) since November of 2016, but a lot has changed. [Gogs](https://gogs.io) since November of 2016, but a lot has changed.
For online demonstrations, you can visit [demo.gitea.com](https://demo.gitea.com). For online demonstrations, you can visit [demo.gitea.com](https://demo.gitea.com).
For accessing free Gitea service (with a limited number of repositories), you can visit [gitea.com](https://gitea.com/user/login). For accessing free Gitea service (with a limited number of repositories), you can visit [gitea.com](https://gitea.com/user/login).
To quickly deploy your own dedicated Gitea instance on Gitea Cloud, you can start a free trial at [cloud.gitea.com](https://cloud.gitea.com). To quickly deploy your own dedicated Gitea instance on Gitea Cloud, you can start a free trial at [cloud.gitea.com](https://cloud.gitea.com).
## Documentation ## Documentation
You can find comprehensive documentation on our official [documentation website](https://docs.gitea.com/). You can find comprehensive documentation on our official [documentation website](https://docs.gitea.com/).
It includes installation, administration, usage, development, contributing guides, and more to help you get started and explore all features effectively. It includes installation, administration, usage, development, contributing guides, and more to help you get started and explore all features effectively.
If you have any suggestions or would like to contribute to it, you can visit the [documentation repository](https://gitea.com/gitea/docs) If you have any suggestions or would like to contribute to it, you can visit the [documentation repository](https://gitea.com/gitea/docs)
## Building ## Building
From the root of the source tree, run: From the root of the source tree, run:
TAGS="bindata" make build TAGS="bindata" make build
or if SQLite support is required: or if SQLite support is required:
TAGS="bindata sqlite sqlite_unlock_notify" make build TAGS="bindata sqlite sqlite_unlock_notify" make build
The `build` target is split into two sub-targets: The `build` target is split into two sub-targets:
- `make backend` which requires [Go Stable](https://go.dev/dl/), the required version is defined in [go.mod](/go.mod). - `make backend` which requires [Go Stable](https://go.dev/dl/), the required version is defined in [go.mod](/go.mod).
- `make frontend` which requires [Node.js LTS](https://nodejs.org/en/download/) or greater and [pnpm](https://pnpm.io/installation). - `make frontend` which requires [Node.js LTS](https://nodejs.org/en/download/) or greater and [pnpm](https://pnpm.io/installation).
Internet connectivity is required to download the go and npm modules. When building from the official source tarballs which include pre-built frontend files, the `frontend` target will not be triggered, making it possible to build without Node.js. Internet connectivity is required to download the go and npm modules. When building from the official source tarballs which include pre-built frontend files, the `frontend` target will not be triggered, making it possible to build without Node.js.
More info: https://docs.gitea.com/installation/install-from-source More info: https://docs.gitea.com/installation/install-from-source
## Using ## Using
After building, a binary file named `gitea` will be generated in the root of the source tree by default. To run it, use: After building, a binary file named `gitea` will be generated in the root of the source tree by default. To run it, use:
./gitea web ./gitea web
> [!NOTE] > [!NOTE]
> If you're interested in using our APIs, we have experimental support with [documentation](https://docs.gitea.com/api). > If you're interested in using our APIs, we have experimental support with [documentation](https://docs.gitea.com/api).
## Contributing ## Contributing
Expected workflow is: Fork -> Patch -> Push -> Pull Request Expected workflow is: Fork -> Patch -> Push -> Pull Request
> [!NOTE] > [!NOTE]
> >
> 1. **YOU MUST READ THE [CONTRIBUTORS GUIDE](CONTRIBUTING.md) BEFORE STARTING TO WORK ON A PULL REQUEST.** > 1. **YOU MUST READ THE [CONTRIBUTORS GUIDE](CONTRIBUTING.md) BEFORE STARTING TO WORK ON A PULL REQUEST.**
> 2. If you have found a vulnerability in the project, please write privately to **security@gitea.io**. Thanks! > 2. If you have found a vulnerability in the project, please write privately to **security@gitea.io**. Thanks!
## Translating ## Translating
[![Crowdin](https://badges.crowdin.net/gitea/localized.svg)](https://translate.gitea.com) [![Crowdin](https://badges.crowdin.net/gitea/localized.svg)](https://translate.gitea.com)
Translations are done through [Crowdin](https://translate.gitea.com). If you want to translate to a new language, ask one of the managers in the Crowdin project to add a new language there. Translations are done through [Crowdin](https://translate.gitea.com). If you want to translate to a new language, ask one of the managers in the Crowdin project to add a new language there.
You can also just create an issue for adding a language or ask on Discord on the #translation channel. If you need context or find some translation issues, you can leave a comment on the string or ask on Discord. For general translation questions there is a section in the docs. Currently a bit empty, but we hope to fill it as questions pop up. You can also just create an issue for adding a language or ask on Discord on the #translation channel. If you need context or find some translation issues, you can leave a comment on the string or ask on Discord. For general translation questions there is a section in the docs. Currently a bit empty, but we hope to fill it as questions pop up.
Get more information from [documentation](https://docs.gitea.com/contributing/localization). Get more information from [documentation](https://docs.gitea.com/contributing/localization).
## Official and Third-Party Projects ## Official and Third-Party Projects
We provide an official [go-sdk](https://gitea.com/gitea/go-sdk), a CLI tool called [tea](https://gitea.com/gitea/tea) and an [action runner](https://gitea.com/gitea/act_runner) for Gitea Action. We provide an official [go-sdk](https://gitea.com/gitea/go-sdk), a CLI tool called [tea](https://gitea.com/gitea/tea) and an [action runner](https://gitea.com/gitea/act_runner) for Gitea Action.
We maintain a list of Gitea-related projects at [gitea/awesome-gitea](https://gitea.com/gitea/awesome-gitea), where you can discover more third-party projects, including SDKs, plugins, themes, and more. We maintain a list of Gitea-related projects at [gitea/awesome-gitea](https://gitea.com/gitea/awesome-gitea), where you can discover more third-party projects, including SDKs, plugins, themes, and more.
## Communication ## Communication
[![](https://img.shields.io/discord/322538954119184384.svg?logo=discord&logoColor=white&label=Discord&color=5865F2)](https://discord.gg/Gitea "Join the Discord chat at https://discord.gg/Gitea") [![](https://img.shields.io/discord/322538954119184384.svg?logo=discord&logoColor=white&label=Discord&color=5865F2)](https://discord.gg/Gitea "Join the Discord chat at https://discord.gg/Gitea")
If you have questions that are not covered by the [documentation](https://docs.gitea.com/), you can get in contact with us on our [Discord server](https://discord.gg/Gitea) or create a post in the [discourse forum](https://forum.gitea.com/). If you have questions that are not covered by the [documentation](https://docs.gitea.com/), you can get in contact with us on our [Discord server](https://discord.gg/Gitea) or create a post in the [discourse forum](https://forum.gitea.com/).
## Authors ## Authors
- [Maintainers](https://github.com/orgs/go-gitea/people) - [Maintainers](https://github.com/orgs/go-gitea/people)
- [Contributors](https://github.com/go-gitea/gitea/graphs/contributors) - [Contributors](https://github.com/go-gitea/gitea/graphs/contributors)
- [Translators](options/locale/TRANSLATORS) - [Translators](options/locale/TRANSLATORS)
## Backers ## Backers
Thank you to all our backers! 🙏 [[Become a backer](https://opencollective.com/gitea#backer)] Thank you to all our backers! 🙏 [[Become a backer](https://opencollective.com/gitea#backer)]
<a href="https://opencollective.com/gitea#backers" target="_blank"><img src="https://opencollective.com/gitea/backers.svg?width=890"></a> <a href="https://opencollective.com/gitea#backers" target="_blank"><img src="https://opencollective.com/gitea/backers.svg?width=890"></a>
## Sponsors ## Sponsors
Support this project by becoming a sponsor. Your logo will show up here with a link to your website. [[Become a sponsor](https://opencollective.com/gitea#sponsor)] Support this project by becoming a sponsor. Your logo will show up here with a link to your website. [[Become a sponsor](https://opencollective.com/gitea#sponsor)]
<a href="https://opencollective.com/gitea/sponsor/0/website" target="_blank"><img src="https://opencollective.com/gitea/sponsor/0/avatar.svg"></a> <a href="https://opencollective.com/gitea/sponsor/0/website" target="_blank"><img src="https://opencollective.com/gitea/sponsor/0/avatar.svg"></a>
<a href="https://opencollective.com/gitea/sponsor/1/website" target="_blank"><img src="https://opencollective.com/gitea/sponsor/1/avatar.svg"></a> <a href="https://opencollective.com/gitea/sponsor/1/website" target="_blank"><img src="https://opencollective.com/gitea/sponsor/1/avatar.svg"></a>
<a href="https://opencollective.com/gitea/sponsor/2/website" target="_blank"><img src="https://opencollective.com/gitea/sponsor/2/avatar.svg"></a> <a href="https://opencollective.com/gitea/sponsor/2/website" target="_blank"><img src="https://opencollective.com/gitea/sponsor/2/avatar.svg"></a>
<a href="https://opencollective.com/gitea/sponsor/3/website" target="_blank"><img src="https://opencollective.com/gitea/sponsor/3/avatar.svg"></a> <a href="https://opencollective.com/gitea/sponsor/3/website" target="_blank"><img src="https://opencollective.com/gitea/sponsor/3/avatar.svg"></a>
<a href="https://opencollective.com/gitea/sponsor/4/website" target="_blank"><img src="https://opencollective.com/gitea/sponsor/4/avatar.svg"></a> <a href="https://opencollective.com/gitea/sponsor/4/website" target="_blank"><img src="https://opencollective.com/gitea/sponsor/4/avatar.svg"></a>
<a href="https://opencollective.com/gitea/sponsor/5/website" target="_blank"><img src="https://opencollective.com/gitea/sponsor/5/avatar.svg"></a> <a href="https://opencollective.com/gitea/sponsor/5/website" target="_blank"><img src="https://opencollective.com/gitea/sponsor/5/avatar.svg"></a>
<a href="https://opencollective.com/gitea/sponsor/6/website" target="_blank"><img src="https://opencollective.com/gitea/sponsor/6/avatar.svg"></a> <a href="https://opencollective.com/gitea/sponsor/6/website" target="_blank"><img src="https://opencollective.com/gitea/sponsor/6/avatar.svg"></a>
<a href="https://opencollective.com/gitea/sponsor/7/website" target="_blank"><img src="https://opencollective.com/gitea/sponsor/7/avatar.svg"></a> <a href="https://opencollective.com/gitea/sponsor/7/website" target="_blank"><img src="https://opencollective.com/gitea/sponsor/7/avatar.svg"></a>
<a href="https://opencollective.com/gitea/sponsor/8/website" target="_blank"><img src="https://opencollective.com/gitea/sponsor/8/avatar.svg"></a> <a href="https://opencollective.com/gitea/sponsor/8/website" target="_blank"><img src="https://opencollective.com/gitea/sponsor/8/avatar.svg"></a>
<a href="https://opencollective.com/gitea/sponsor/9/website" target="_blank"><img src="https://opencollective.com/gitea/sponsor/9/avatar.svg"></a> <a href="https://opencollective.com/gitea/sponsor/9/website" target="_blank"><img src="https://opencollective.com/gitea/sponsor/9/avatar.svg"></a>
## FAQ ## FAQ
**How do you pronounce Gitea?** **How do you pronounce Gitea?**
Gitea is pronounced [/ɡɪ’ti:/](https://youtu.be/EM71-2uDAoY) as in "gi-tea" with a hard g. Gitea is pronounced [/ɡɪ’ti:/](https://youtu.be/EM71-2uDAoY) as in "gi-tea" with a hard g.
**Why is this not hosted on a Gitea instance?** **Why is this not hosted on a Gitea instance?**
We're [working on it](https://github.com/go-gitea/gitea/issues/1029). We're [working on it](https://github.com/go-gitea/gitea/issues/1029).
**Where can I find the security patches?** **Where can I find the security patches?**
In the [release log](https://github.com/go-gitea/gitea/releases) or the [change log](https://github.com/go-gitea/gitea/blob/main/CHANGELOG.md), search for the keyword `SECURITY` to find the security patches. In the [release log](https://github.com/go-gitea/gitea/releases) or the [change log](https://github.com/go-gitea/gitea/blob/main/CHANGELOG.md), search for the keyword `SECURITY` to find the security patches.
## License ## License
This project is licensed under the MIT License. This project is licensed under the MIT License.
See the [LICENSE](https://github.com/go-gitea/gitea/blob/main/LICENSE) file See the [LICENSE](https://github.com/go-gitea/gitea/blob/main/LICENSE) file
for the full license text. for the full license text.
## Further information ## Further information
<details> <details>
<summary>Looking for an overview of the interface? Check it out!</summary> <summary>Looking for an overview of the interface? Check it out!</summary>
### Login/Register Page ### Login/Register Page
![Login](https://dl.gitea.com/screenshots/login.png) ![Login](https://dl.gitea.com/screenshots/login.png)
![Register](https://dl.gitea.com/screenshots/register.png) ![Register](https://dl.gitea.com/screenshots/register.png)
### User Dashboard ### User Dashboard
![Home](https://dl.gitea.com/screenshots/home.png) ![Home](https://dl.gitea.com/screenshots/home.png)
![Issues](https://dl.gitea.com/screenshots/issues.png) ![Issues](https://dl.gitea.com/screenshots/issues.png)
![Pull Requests](https://dl.gitea.com/screenshots/pull_requests.png) ![Pull Requests](https://dl.gitea.com/screenshots/pull_requests.png)
![Milestones](https://dl.gitea.com/screenshots/milestones.png) ![Milestones](https://dl.gitea.com/screenshots/milestones.png)
### User Profile ### User Profile
![Profile](https://dl.gitea.com/screenshots/user_profile.png) ![Profile](https://dl.gitea.com/screenshots/user_profile.png)
### Explore ### Explore
![Repos](https://dl.gitea.com/screenshots/explore_repos.png) ![Repos](https://dl.gitea.com/screenshots/explore_repos.png)
![Users](https://dl.gitea.com/screenshots/explore_users.png) ![Users](https://dl.gitea.com/screenshots/explore_users.png)
![Orgs](https://dl.gitea.com/screenshots/explore_orgs.png) ![Orgs](https://dl.gitea.com/screenshots/explore_orgs.png)
### Repository ### Repository
![Home](https://dl.gitea.com/screenshots/repo_home.png) ![Home](https://dl.gitea.com/screenshots/repo_home.png)
![Commits](https://dl.gitea.com/screenshots/repo_commits.png) ![Commits](https://dl.gitea.com/screenshots/repo_commits.png)
![Branches](https://dl.gitea.com/screenshots/repo_branches.png) ![Branches](https://dl.gitea.com/screenshots/repo_branches.png)
![Labels](https://dl.gitea.com/screenshots/repo_labels.png) ![Labels](https://dl.gitea.com/screenshots/repo_labels.png)
![Milestones](https://dl.gitea.com/screenshots/repo_milestones.png) ![Milestones](https://dl.gitea.com/screenshots/repo_milestones.png)
![Releases](https://dl.gitea.com/screenshots/repo_releases.png) ![Releases](https://dl.gitea.com/screenshots/repo_releases.png)
![Tags](https://dl.gitea.com/screenshots/repo_tags.png) ![Tags](https://dl.gitea.com/screenshots/repo_tags.png)
#### Repository Issue #### Repository Issue
![List](https://dl.gitea.com/screenshots/repo_issues.png) ![List](https://dl.gitea.com/screenshots/repo_issues.png)
![Issue](https://dl.gitea.com/screenshots/repo_issue.png) ![Issue](https://dl.gitea.com/screenshots/repo_issue.png)
#### Repository Pull Requests #### Repository Pull Requests
![List](https://dl.gitea.com/screenshots/repo_pull_requests.png) ![List](https://dl.gitea.com/screenshots/repo_pull_requests.png)
![Pull Request](https://dl.gitea.com/screenshots/repo_pull_request.png) ![Pull Request](https://dl.gitea.com/screenshots/repo_pull_request.png)
![File](https://dl.gitea.com/screenshots/repo_pull_request_file.png) ![File](https://dl.gitea.com/screenshots/repo_pull_request_file.png)
![Commits](https://dl.gitea.com/screenshots/repo_pull_request_commits.png) ![Commits](https://dl.gitea.com/screenshots/repo_pull_request_commits.png)
#### Repository Actions #### Repository Actions
![List](https://dl.gitea.com/screenshots/repo_actions.png) ![List](https://dl.gitea.com/screenshots/repo_actions.png)
![Details](https://dl.gitea.com/screenshots/repo_actions_run.png) ![Details](https://dl.gitea.com/screenshots/repo_actions_run.png)
#### Repository Activity #### Repository Activity
![Activity](https://dl.gitea.com/screenshots/repo_activity.png) ![Activity](https://dl.gitea.com/screenshots/repo_activity.png)
![Contributors](https://dl.gitea.com/screenshots/repo_contributors.png) ![Contributors](https://dl.gitea.com/screenshots/repo_contributors.png)
![Code Frequency](https://dl.gitea.com/screenshots/repo_code_frequency.png) ![Code Frequency](https://dl.gitea.com/screenshots/repo_code_frequency.png)
![Recent Commits](https://dl.gitea.com/screenshots/repo_recent_commits.png) ![Recent Commits](https://dl.gitea.com/screenshots/repo_recent_commits.png)
### Organization ### Organization
![Home](https://dl.gitea.com/screenshots/org_home.png) ![Home](https://dl.gitea.com/screenshots/org_home.png)
</details> </details>

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{"status":200,"message":"Welcome to the Evolution API, it is working!","version":"2.2.3","clientName":"soberana-evolution","manager":"http://evolution.soberana.srv.br/manager","documentation":"https://doc.evolution-api.com"}

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FastAPI do ZERO
Caso prefira ver a apresentação do curso em vídeo
Esse material passa por atualizações periódicas. Você pode acompanhar as notas de alterações aqui.
Olá, boas-vindas ao curso de FastAPI!
A nossa intenção neste curso é facilitar o aprendizado no desenvolvimento de APIs usando o FastAPI. Vamos explorar como integrar bancos de dados, criar testes e um sistema básico de autenticação com JWT. Tudo isso para oferecer uma boa base para quem quer trabalhar com desenvolvimento web com Python. A ideia desse curso é apresentar os conceitos de forma prática, construindo um projeto do zero e indo até a sua fase de produção.
O que é FastAPI?
FastAPI é um framework Python moderno, projetado para simplicidade, velocidade e eficiência. A combinação de diversas funcionalidades modernas do Python, como anotações de tipo e suporte à concorrência. Simplificando o desenvolvimento de APIs.
Sobre o curso
Este curso foi desenvolvido para oferecer uma experiência prática no uso do FastAPI. O objetivo é que você obtenha uma compreensão das funcionalidades do FastAPI e de boas práticas associadas a ele.
O projeto central do curso será a construção de um gerenciador de tarefas (uma lista de tarefas), começando do zero. Esse projeto incluirá a implementação da autenticação do usuário e das operações CRUD completas.
Para a construção do projeto, serão utilizadas as versões mais recentes das ferramentas, disponíveis em 2026, como a versão do 0.136.3 FastAPI, a versão 2.13.4 do Pydantic, a versão 2.0.50 do SQLAlchemy ORM, além do suporte ao Python 3.11/3.12/3.13/3.14, e do Alembic 1.18.4 para gerenciamento de migrações.
Além da construção do projeto, o curso também incluirá a prática de testes, utilizando o pytest. Essa abordagem planeja garantir que as APIs desenvolvidas sejam não somente funcionais, mas também robustas e confiáveis.

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{ {
"extends": "./tsconfig.json", "extends": "./tsconfig.json",
"exclude": ["node_modules", "test", "dist", "**/*spec.ts"] "exclude": ["node_modules", "test", "dist", "**/*spec.ts"]
} }

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De onde o YOLO pega o contexto global? Como consegue fazer isso e porque os R - CNN não conseguiam?
O modelo YOLO consegue extrair o contexto global porque as suas camadas convolucionais mais profundas capturam campos receptivos (receptive fields) maiores da imagem
. Em vez de analisar pedaços isolados, ele processa a imagem inteira de uma só vez através de uma única rede. À medida que a informação flui para as camadas mais profundas, cada neurônio passa a "enxergar" áreas cada vez maiores da imagem original, permitindo que as predições finais considerem simultaneamente o objeto e o cenário ao seu redor
.
Os modelos da família R-CNN não conseguiam fazer isso de forma eficiente devido à sua arquitetura baseada em estágios e "propostas de regiões"
. O funcionamento deles obrigava a rede a focar apenas em áreas restritas:
No R-CNN original, o algoritmo literalmente recortava cerca de 2.000 pedaços da imagem de entrada (propostas de regiões) e passava cada um desses recortes de forma independente pela rede neural para ser classificado
.
Nas evoluções Fast e Faster R-CNN, embora a imagem inteira passasse junta pelas primeiras camadas convolucionais para economizar processamento, o modelo ainda aplicava uma operação de recorte (Crop / RoI pooling) diretamente sobre os mapas de características para isolar apenas as caixas suspeitas
. O classificador final só avaliava o que estava dentro desse recorte
.
A grande diferença: Ao isolar e classificar apenas uma caixa recortada (como os R-CNNs fazem), a rede perde a visão do que está em volta daquele objeto
. É por isso que abordagens baseadas em regiões têm uma tendência maior a cometer "erros de fundo" (confundir uma textura no cenário com um objeto). O YOLO, por nunca recortar a imagem e tratar a detecção como uma regressão única onde as últimas camadas têm o contexto de toda a cena, compreende muito melhor a diferença entre o que é um objeto de fato e o que é apenas o fundo da imagem
.