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<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<!-- Meta tags for social media banners, these should be filled in appropriatly as they are your "business card" -->
<!-- Replace the content tag with appropriate information -->
<!-- <meta name="description" content="DESCRIPTION META TAG"> -->
<meta property="og:title"
content="PIXART-Σ:Weak-to-Strong Training of Diffusion Transformer for 4K Text-to-Image Generation" />
<!-- <meta property="og:description" content="SOCIAL MEDIA DESCRIPTION TAG TAG" /> -->
<meta property="og:url" content="https://github.com/PixArt-alpha/PixArt-sigma-project" />
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<meta name="viewport" content="width=device-width, initial-scale=1">
<title>PIXART-Σ</title>
<link rel="icon" type="image/x-icon" href="static/images/favicon.ico">
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<script type="module" src="https://gradio.s3-us-west-2.amazonaws.com/4.1.1/gradio.js"></script>
</head>
<body>
<section class="hero banner">
<div class="hero-body">
<div class="container is-max-desktop">
<div class="columns is-centered">
<div class="column has-text-centered">
<h1 class="title is-1 publication-title"><i class="pixart-alpha-icon"></i>PIXART-Σ:<br />
Weak-to-Strong Training of Diffusion Transformer
for 4K Text-to-Image Generation</h1>
<div class="is-size-5 publication-authors">
<!-- Paper authors -->
<span class="author-block">
<a href="https://lawrence-cj.github.io/" target="_blank">Junsong
Chen</a><sup>1,2,3*</sup>,</span>
<span class="author-block">
<a href="https://chongjiange.github.io" target="_blank">Chongjian
Ge</a><sup>1,3*</sup>,</span>
<span class="author-block">
<a href="https://xieenze.github.io/" target="_blank">Enze Xie</a><sup>1*‡</sup>,
</span>
<span class="author-block">
<a href="https://yuewuhkust.github.io/" target="_blank">Yue Wu</a><sup>1*</sup>,
</span>
<span class="author-block">
<a href="https://scholar.google.com/citations?user=hqDyTg8AAAAJ" target="_blank">Lewei
Yao</a><sup>1</sup>,
</span>
<span class="author-block">
<a href="" target="_blank">Xiaozhe Ren</a><sup>1</sup>,
</span>
<span class="author-block">
<a href="https://zhongdao.github.io/" target="_blank">Zhongdao Wang</a><sup>1</sup>,
</span>
<span class="author-block">
<a href="http://luoping.me/" target="_blank">Ping Luo</a><sup>3</sup>,
</span>
<span class="author-block">
<a href="https://scholar.google.com/citations?hl=en&user=D3nE0agAAAAJ"
target="_blank">Huchuan Lu</a><sup>2</sup>,
</span>
<span class="author-block">
<a href="https://scholar.google.com/citations?user=XboZC1AAAAAJ" target="_blank">Zhenguo
Li</a><sup>1</sup>
</span>
</div>
<div class="is-size-5 publication-authors">
<span class="author-block"><sup>1</sup>Huawei Noah's Ark Lab,</span>
<span class="author-block"><sup>2</sup>Dalian University of Technology,</span>
<span class="author-block"><sup>3</sup>The University of Hong Kong,</span>
<span class="eql-cntrb"><small><br><sup>*</sup>Equal contribution. Work done during the
internships of the first two students at Huawei Noah's Ark Lab.</small></span>
<span class="eql-cntrb"><small><br><sup>‡</sup><a
href="mailto:[email protected]">Corresponding author.</a></small></span>
</div>
<div class="column has-text-centered">
<div class="publication-links">
<span class="link-block">
<a href="https://github.com/PixArt-alpha/PixArt-sigma" target="_blank"
class="external-link button is-normal is-rounded is-white">
<span class="icon">
<i class="fab fa-github"></i>
</span>
<span>Code</span>
</a>
</span>
<span class="link-block">
<a href="https://arxiv.org/abs/2403.04692" target="_blank"
class="external-link button is-normal is-rounded is-white">
<span class="icon">
<i class="ai ai-arxiv"></i>
</span>
<span>arXiv-PixArt-Σ</span>
</a>
</span>
<span class="link-block">
<a href="https://arxiv.org/abs/2310.00426" target="_blank"
class="external-link button is-normal is-rounded is-white">
<span class="icon">
<i class="ai ai-arxiv"></i>
</span>
<span>arXiv-PixArt-α</span>
</a>
</span>
<span class="link-block">
<a href="https://arxiv.org/abs/2401.05252" target="_blank"
class="external-link button is-normal is-rounded is-white">
<span class="icon">
<i class="ai ai-arxiv"></i>
</span>
<span>arXiv-PixArt-δ</span>
</a>
</span>
<span class="link-block">
<a href="https://discord.gg/rde6eaE5Ta" target="_blank"
class="external-link button is-normal is-rounded is-white">
<span class="icon">
<i class="fab fa-discord"></i>
</span>
<span>Discord</span>
</a>
</span>
<span class="link-block">
<a href="https://huggingface.co/datasets/PixArt-alpha/PixArt-Eval30K/tree/main" target="_blank"
class="external-link button is-normal is-rounded is-white">
<span class="icon">🤗</span>
<span>PixArt-Eval30K</span>
</a>
</span>
</div>
</div>
<div class="column has-text-centered">
<div class="publication-links">
<span class="link-block">
<a href="https://huggingface.co/spaces/PixArt-alpha/PixArt-Sigma" target="_blank"
class="external-link button is-normal is-rounded is-white">
<span class="icon">🤗</span>
<span>HF Demo: PixArt-Σ</span>
</a>
</span>
<span class="link-block">
<a href="https://huggingface.co/spaces/PixArt-alpha/PixArt-alpha" target="_blank"
class="external-link button is-normal is-rounded is-white">
<span class="icon">🤗</span>
<span>HF Demo: PixArt-α</span>
</a>
</span>
<span class="link-block">
<a href="https://huggingface.co/spaces/PixArt-alpha/PixArt-LCM" target="_blank"
class="external-link button is-normal is-rounded is-white">
<span class="icon">🤗</span>
<span>HF Demo: PixArt-LCM</span>
</a>
</span>
<span class="link-block">
<a href="https://openxlab.org.cn/apps/detail/PixArt-alpha/PixArt-alpha" target="_blank"
class="external-link button is-normal is-rounded is-white">
<span class="icon">X</span>
<span>OpenXLab Demo: PixArt-α</span>
</a>
</span>
<span class="link-block">
<a href="https://openxlab.org.cn/apps/detail/houshaowei/PixArt-LCM" target="_blank"
class="external-link button is-normal is-rounded is-white">
<span class="icon">X</span>
<span>OpenXLab Demo: PixArt-LCM</span>
</a>
</span>
<span class="link-block">
<a href="https://colab.research.google.com/drive/1jZ5UZXk7tcpTfVwnX33dDuefNMcnW9ME?usp=sharing" target="_blank"
class="external-link button is-normal is-rounded is-white">
<span class="icon">
<i class="fab fa-google"></i>
</span>
<span>Colab Demo</span>
</a>
</span>
</div>
</div>
</div>
</div>
</div>
</div>
</section>
<!-- Image carousel -->
<section class="hero is-small">
<div class="hero-body">
<div class="container">
<div id="results-carousel" class="carousel results-carousel">
<div class="card">
<div class="card-image">
<img src="static/images/samples/2506x3840_webp/5ebc46ae-bdcc-4481-8aec-0a0c71b9b2cd_373047732.webp" alt="carousel1" />
</div>
<div class="card-content has-text-centered">Eiffel Tower was Made up of more than 2 million
translucent straws to look like a cloud, with the bell tower at the top of the building,
Michel installed huge foam-making machines in the forest to blow huge amounts of
unpredictable wet clouds in the building's classic architecture.</div>
</div>
<div class="card">
<div class="card-image">
<img src="static/images/samples/2506x3840_webp/63c3f6d8-45f5-4629-bcba-a29724a72bcc_124995213.webp" alt="carousel2" />
</div>
<div class="card-content has-text-centered">Full body shot, a French woman, Photography,
French Streets background, backlighting, rim light, Fujifilm.</div>
</div>
<div class="card">
<div class="card-image">
<img src="static/images/samples/2506x3840_webp/64377226-2032-44e0-a2a4-d343ab1f211c_832061942.webp" alt="carousel3" />
</div>
<div class="card-content has-text-centered">A curvy timber house near a sea, designed by
Zaha Hadid, represent the image of a cold, modern architecture, at night, white lighting,
highly detailed.</div>
</div>
<div class="card">
<div class="card-image">
<img src="static/images/samples/2506x3840_webp/ef78ed0c-216b-4960-98e6-18eed8a7b75f_999700588.webp" alt="carousel4" />
</div>
<div class="card-content has-text-centered">Over the shoulder game perspective, game screen of
Diablo 4, Inside the gorgeous palace is the wet ground, The necromancer knelt before the
king, and a horde of skeletons he summoned stood at his side, cinematic light.</div>
</div>
<div class="card">
<div class="card-image">
<img src="static/images/samples/2506x3840_webp/004964dd-7330-4891-9b24-abac85881f72_842016613.webp" alt="carousel5" />
</div>
<div class="card-content has-text-centered">Modern luxury contemporary luxury home interiors
house, in the style of mimicking ruined materials, ray tracing, haunting houses,
and stone, capture the essence of nature, gray and bronze, dynamic outdoor shots.</div>
</div>
<div class="card">
<div class="card-image">
<img src="static/images/samples/2506x3840_webp/367260ba-ca78-41f1-8bd7-217c5592661e_1681532798.webp" alt="carousel6" />
</div>
<div class="card-content has-text-centered">One giant, sharp, metal square mirror in the center
of the frame, four young people on the foreground, background sunny palm oil planation,
tropical, realistic style, photography, nostalgic, green tone, mysterious, dreamy,
bright color.</div>
</div>
<div class="card">
<div class="card-image">
<img src="static/images/samples/2506x3840_webp/1b71b50e-97f3-4a42-898e-afd533e703e8_1948066005.webp" alt="carousel8" />
</div>
<div class="card-content has-text-centered">Lego model, future rocket station, intricate details, high resolution, unreal engine, UHD</div>
</div>
<div class="card">
<div class="card-image">
<img src="static/images/samples/2506x3840_webp/90ca596c-0586-477e-8ef6-bb2e763ce53a_1454318251.webp" alt="carousel8" />
</div>
<div class="card-content has-text-centered">A gorgeously rendered papercraft world
of a coral reef, rife with colorful fish and sea creatures.</div>
</div>
<div class="card">
<div class="card-image">
<img src="static/images/samples/2506x3840_webp/43362701-2714-4606-9f89-cf0e9a90f911_1615688214.webp" alt="carousel7" />
</div>
<div class="card-content has-text-centered">A litter of golden retriever puppies playing
in the snow. Their heads pop out of the snow, covered in.</div>
</div>
<div class="card">
<div class="card-image">
<img src="static/images/samples/2506x3840_webp/7fdb417a-abad-4f1c-b4b6-41e58490c9ed_1474140331.webp" alt="carousel8" />
</div>
<div class="card-content has-text-centered">Close-up photos of models, hazy light and shadow,
laser metal hair accessories, soft and beautiful, light gold pupils, white eyelashes,
low saturation, real skin details, clear pores and fine lines, light reflection and
refraction, ultra-clear, cinematography, award-winning works.</div>
</div>
</div>
</div>
</div>
</section>
<!-- End image carousel -->
<!-- Paper abstract -->
<section class="section hero is-light">
<div class="container is-max-desktop">
<div class="columns is-centered has-text-centered">
<div class="column is-four-fifths">
<h2 class="title is-3">Abstract</h2>
<div class="content has-text-justified">
<p>
In this paper, we introduce PixArt-Σ, a Diffusion Transformer model (DiT) capable of
directly generating images at 4K resolution. PixArt-Σ represents a significant
advancement over its predecessor, PixArt-α, offering images of markedly higher fidelity
and improved alignment with text prompts. A key feature of PixArt-Σ is its training efficiency.
Leveraging the foundational pre-training of PixArt-α, it evolves from the ‘weaker’
baseline to a ‘stronger’ model via incorporating higher quality data, a process we term
“weak-to-strong training”. The advancements in PixArt-Σ are twofold: (1) High-Quality
Training Data: PixArt-Σ incorporates superior-quality image data, paired with more precise
and detailed image captions. (2) Efficient Token Compression: we propose a novel attention
module within the DiT framework that compresses both keys and values, significantly
improving efficiency and facilitating ultra-high-resolution image generation. Thanks to
these improvements, PixArt-Σ achieves superior image quality and user prompt adherence
capabilities with significantly smaller model size (0.6B parameters) than existing
text-to-image diffusion models, such as SDXL (2.6B parameters) and SD Cascade (5.1B parameters).
Moreover, PixArt-Σ’s capability to generate 4K images supports the creation of high-resolution
posters and wallpapers, efficiently bolstering the production of high-quality visual content
in industries such as film and gaming.
</p>
</div>
</div>
</div>
</div>
</section>
<!-- End paper abstract -->
<!-- <section class="hero is-small">-->
<!-- <div class="hero-body">-->
<!-- <div class="container is-centered has-text-centered">-->
<!-- <h2 class="title is-3">Online Demo</h2>-->
<!-- <gradio-app src="https://pixart-alpha-pixart-alpha.hf.space" style="display: flex; justify-content: center;"></gradio-app>-->
<!-- </div>-->
<!-- </div>-->
<!-- </section>-->
<!-- <section class="hero is-small">-->
<!-- <div class="hero-body">-->
<!-- <div class="container is-max-desktop">-->
<!-- <h2 class="title is-3">Training Efficiency</h2>-->
<!-- <p>Comparisons of CO<sub>2</sub> emissions and training cost among T2I generators. PIXART-α-->
<!-- achieves an exceptionally low training cost of $26,000. Compared to RAPHAEL, our CO<sub>2</sub>-->
<!-- emissions-->
<!-- and training costs are merely 1.1% and 0.85%, respectively.-->
<!-- </p>-->
<!-- <img loading="lazy" src="static/images/efficiency.svg" alt="efficiency" />-->
<!-- </div>-->
<!-- </div>-->
<!-- </section>-->
<section class="hero is-small">
<div class="hero-body">
<div class="container is-max-desktop">
<h2 class="title is-3">More Samples</h2>
<div class="columns is-centered has-text-centered">
<div class="column">
<div id="modal-4K_image" class="modal">
<div class="modal-background"></div>
<div class="modal-content">
<img loading="lazy" src="static/images/samples/others_webp/4K_image.webp" />
</div>
<button class="modal-close is-large" aria-label="close"></button>
</div>
<div class="card">
<div class="card-image js-modal-trigger" data-target="modal-4K_image">
<img loading="lazy" src="static/images/samples/others_webp/4K_image.webp" alt="4K_image">
</div>
</div>
</div>
</div>
<div class="columns is-centered has-text-centered">
<div class="column">
<div id="modal-compare" class="modal">
<div class="modal-background"></div>
<div class="modal-content">
<img loading="lazy" src="static/images/samples/others_webp/compare.webp" />
</div>
<button class="modal-close is-large" aria-label="close"></button>
</div>
<div class="card">
<div class="card-image js-modal-trigger" data-target="modal-compare">
<img loading="lazy" src="static/images/samples/others_webp/compare.webp" alt="compare">
</div>
</div>
</div>
</div>
<div class="columns is-centered has-text-centered">
<div class="column">
<div id="modal-sample5" class="modal">
<div class="modal-background"></div>
<div class="modal-content">
<img loading="lazy" src="static/images/samples/others_webp/sample5.webp" />
</div>
<button class="modal-close is-large" aria-label="close"></button>
</div>
<div class="card">
<div class="card-image js-modal-trigger" data-target="modal-sample5">
<img loading="lazy" src="static/images/samples/others_webp/sample5.webp" alt="sample5" />
</div>
<div class="card-content">Drone view of waves crashing against the rugged cliffs along
Big Sur’s Garay Point beach. The crashing blue waters create white-tipped waves,
while the golden light of the setting sun illuminates the rocky shore.</div>
</div>
</div>
<div class="column">
<div id="modal-sample6" class="modal">
<div class="modal-background"></div>
<div class="modal-content">
<img loading="lazy" src="static/images/samples/others_webp/sample6.webp" />
</div>
<button class="modal-close is-large" aria-label="close"></button>
</div>
<div class="card">
<div class="card-image js-modal-trigger" data-target="modal-sample6">
<img loading="lazy" src="static/images/samples/others_webp/sample6.webp" alt="sample6">
</div>
<div class="card-content">A Ukiyoe-style painting, an astronaut riding a unicorn,
In the background there is an ancient Japanese architecture.</div>
</div>
</div>
</div>
<div class="columns is-centered has-text-centered">
<div class="column">
<div id="modal-sample7" class="modal">
<div class="modal-background"></div>
<div class="modal-content">
<img loading="lazy" src="static/images/samples/others_webp/sample7.webp" />
</div>
<button class="modal-close is-large" aria-label="close"></button>
</div>
<div class="card">
<div class="card-image js-modal-trigger" data-target="modal-sample7">
<img loading="lazy" src="static/images/samples/others_webp/sample7.webp" alt="sample7" />
</div>
<div class="card-content">A Japanese girl walking along a path, surrounded by blooming
oriental cherries, pink petals slowly falling down to the ground.</div>
</div>
</div>
<div class="column">
<div id="modal-sample8" class="modal">
<div class="modal-background"></div>
<div class="modal-content">
<img loading="lazy" src="static/images/samples/others_webp/sample8.webp" />
</div>
<button class="modal-close is-large" aria-label="close"></button>
</div>
<div class="card">
<div class="card-image js-modal-trigger" data-target="modal-sample8">
<img loading="lazy" src="static/images/samples/others_webp/sample8.webp" alt="sample8">
</div>
<div class="card-content">Astronaut on Mars During sunset.</div>
</div>
</div>
</div>
<div class="columns is-centered has-text-centered">
<div class="column">
<div id="modal-sample9" class="modal">
<div class="modal-background"></div>
<div class="modal-content">
<img loading="lazy" src="static/images/samples/1024x1024_web/sample9.webp" />
</div>
<button class="modal-close is-large" aria-label="close"></button>
</div>
<div class="card">
<div class="card-image js-modal-trigger" data-target="modal-sample9">
<img loading="lazy" src="static/images/samples/1024x1024_web/sample9.webp" alt="sample9" />
</div>
<div class="card-content">Color photo of a corgi made of transparent glass,
standing on the riverside in Yosemite National Park.</div>
</div>
</div>
<div class="column">
<div id="modal-sample10" class="modal">
<div class="modal-background"></div>
<div class="modal-content">
<img loading="lazy" src="static/images/samples/1024x1024_web/sample10.webp" />
</div>
<button class="modal-close is-large" aria-label="close"></button>
</div>
<div class="card">
<div class="card-image js-modal-trigger" data-target="modal-sample10">
<img loading="lazy" src="static/images/samples/1024x1024_web/sample10.webp" alt="sample10">
</div>
<div class="card-content">
Happy dreamy owl monster sitting on a tree branch, colorful glittering particles,
forest background, detailed feathers.</div>
</div>
</div>
<!-- </div>-->
<!-- <div class="columns is-centered has-text-centered">-->
<div class="column">
<div id="modal-sample11" class="modal">
<div class="modal-background"></div>
<div class="modal-content">
<img loading="lazy" src="static/images/samples/1024x1024_web/sample11.webp" />
</div>
<button class="modal-close is-large" aria-label="close"></button>
</div>
<div class="card">
<div class="card-image js-modal-trigger" data-target="modal-sample11">
<img loading="lazy" src="static/images/samples/1024x1024_web/sample11.webp" alt="sample11" />
</div>
<div class="card-content">
Game-Art - An island with different geographical properties and multiple small
cities floating in space
</div>
</div>
</div>
<div class="column">
<div id="modal-sample12" class="modal">
<div class="modal-background"></div>
<div class="modal-content">
<img loading="lazy" src="static/images/samples/1024x1024_web/sample12.webp" />
</div>
<button class="modal-close is-large" aria-label="close"></button>
</div>
<div class="card">
<div class="card-image js-modal-trigger" data-target="modal-sample12">
<img loading="lazy" src="static/images/samples/1024x1024_web/sample12.webp" alt="sample12">
</div>
<div class="card-content">
Photorealistic closeup video of two pirate ships battling each other
as they sail inside a cup of coffee.
</div>
</div>
</div>
</div>
<div class="columns is-centered has-text-centered">
<div class="column">
<div id="modal-sample1" class="modal">
<div class="modal-background"></div>
<div class="modal-card">
<img loading="lazy" src="static/images/samples/2560x3840_webp/sample1.webp" />
</div>
<button class="modal-close is-large" aria-label="close"></button>
</div>
<div class="card">
<div class="card-image js-modal-trigger" data-target="modal-sample1">
<img loading="lazy" src="static/images/samples/2560x3840_webp/sample1.webp" alt="sample1" />
</div>
<div class="card-content">A car made out of vegetables.</div>
</div>
</div>
<div class="column">
<div id="modal-sample2" class="modal">
<div class="modal-background"></div>
<div class="modal-content">
<img loading="lazy" src="static/images/samples/2560x3840_webp/sample4.webp" />
</div>
<button class="modal-close is-large" aria-label="close"></button>
</div>
<div class="card">
<div class="card-image js-modal-trigger" data-target="modal-sample2">
<img loading="lazy" src="static/images/samples/2560x3840_webp/sample4.webp" alt="sample2">
</div>
<div class="card-content">A serene lakeside during autumn with trees displaying a
palette of fiery colors.</div>
</div>
</div>
<!-- </div>-->
<!-- <div class="columns is-centered has-text-centered">-->
<div class="column">
<div id="modal-sample3" class="modal">
<div class="modal-background"></div>
<div class="modal-content">
<img loading="lazy" src="static/images/samples/2560x3840_webp/sample3.webp" />
</div>
<button class="modal-close is-large" aria-label="close"></button>
</div>
<div class="card">
<div class="card-image js-modal-trigger" data-target="modal-sample3">
<img loading="lazy" src="static/images/samples/2560x3840_webp/sample3.webp" alt="sample3" />
</div>
<div class="card-content">A realistic landscape shot of the Northern Lights dancing over a
snowy mountain range in Iceland.</div>
</div>
</div>
<div class="column">
<div id="modal-sample4" class="modal">
<div class="modal-background"></div>
<div class="modal-content">
<img loading="lazy" src="static/images/samples/2560x3840_webp/sample2.webp" />
</div>
<button class="modal-close is-large" aria-label="close"></button>
</div>
<div class="card">
<div class="card-image js-modal-trigger" data-target="modal-sample4">
<img loading="lazy" src="static/images/samples/2560x3840_webp/sample2.webp" alt="sample4">
</div>
<div class="card-content">A deep forest clearing with a mirrored pond reflecting a
galaxy-filled night sky.</div>
</div>
</div>
</div>
</div>
</div>
</section>
<!-- BibTex citation-->
<section class="section" id="BibTeX">
<div class="container is-max-desktop content">
<h2 class="title">BibTeX</h2>
<pre><code>@misc{chen2024pixartsigma,
title={PixArt-\Sigma: Weak-to-Strong Training of Diffusion Transformer for 4K Text-to-Image Generation},
author={Junsong Chen and Chongjian Ge and Enze Xie and Yue Wu and Lewei Yao and Xiaozhe Ren and Zhongdao Wang and Ping Luo and Huchuan Lu and Zhenguo Li},
year={2024},
eprint={2403.04692},
archivePrefix={arXiv},
primaryClass={cs.CV}
}</code></pre>
</div>
</section>
<!-- End BibTex citation-->
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