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neosr is an open-source framework for training super-resolution models. It provides a comprehensive and reproducible environment for achieving state-of-the-art image restoration results, making it suitable for both the enthusiastic community, professionals and machine learning academic researchers. It serves as a versatile platform and aims to bridge the gap between practical application and academic research in the field.

• Accessible: implements a wide range of the latest advancements in single-image super-resolution networks, losses, optimizers and augmentations. Users can easily explore, adapt and experiment with various configurations for their specific needs, even without coding skills.

• Efficient: optimized for faster training iterations, quicker convergence and low GPU requirements, making it the most efficient choice for both research and practical use cases.

• Practical: focuses on the real-world use of super-resolution to realistically restore degraded images in various domains, including photos, anime/cartoons, illustrations and more. It's also suitable for critical applications like medical imaging, forensics, geospatial and others (although caution should be taken in those cases).

• Reproducible: this framework emphasizes the importance of reproducible research. It provides deterministic training environments that can create bit-exact reproducible models (on the same platform), ensuring predictable and reliable results, which are essential for maintaining consistency in academic validation.

• Simple: features are easy to implement or modify. Code is written in readable Python, no fancy styling. All code is managed, validated and formatted by uv, ruff, mypy and torchfix.

For more information see our wiki.

🤝 support the project

Tip

Consider supporting the project on KoFi ☕ or Patreon

💻 installation

Requires CUDA >=12.4

Windows:

powershell -ExecutionPolicy ByPass -c "irm https://raw.githubusercontent.com/neosr-project/neosr/refs/heads/master/install_windows.ps1 | iex"

Linux:

curl -LsSf https://raw.githubusercontent.com/neosr-project/neosr/refs/heads/master/install_linux.sh | sh

Note: neosr will be installed on your terminal current path.

To update neosr, run:

neosr-update

For manual installation details, see our Installation Instructions wiki.

⏩ quick start

Start training by running:

neosr-train config.toml

Where config.toml is a configuration file. Templates can be found in options.

Tip

Please read the wiki Configuration Walkthrough for an explanation of each option.

✨ features

supported archs:

arch	option
Real-ESRGAN	esrgan
SRVGGNetCompact	compact
SwinIR	swinir_small, swinir_medium
HAT	hat_s, hat_m, hat_l
OmniSR	omnisr
SRFormer	srformer_light, srformer_medium
DAT	dat_small, dat_medium, dat_2
DITN	ditn
DCTLSA	dctlsa
SPAN	span
Real-CUGAN	cugan
CRAFT	craft
SAFMN	safmn, safmn_l
RGT	rgt, rgt_s
ATD	atd, atd_light
PLKSR	plksr, plksr_tiny
RealPLKSR	realplksr, realplksr_s, realplksr_l
DRCT	drct, drct_l, drct_s
MSDAN	msdan
SPANPlus	spanplus, spanplus_sts, spanplus_s, spanplus_st
HiT-SRF	hit_srf, hit_srf_medium, hit_srf_large
HMA	hma, hma_medium, hma_large
MAN	man, man_tiny, man_light
light-SAFMN++	light_safmnpp
GRFormer	grformer, grformer_medium, grformer_large
EIMN	eimn, eimn_a, eimn_l
LMLT	lmlt, lmlt_tiny, lmlt_large
DCT	dct
KRGN	krgn
PlainUSR	plainusr, plainusr_ultra, plainusr_large
HASN	hasn
FlexNet	flexnet, metaflexnet
CFSR	cfsr
Sebica	sebica, sebica_mini
NinaSR	ninasr, ninasr_b0, ninasr_b2
RCAN	rcan
MoESR	moesr
ASID	asid, asid_d8
MoSRV2	mosrv2
ESC	esc, esc_fp, esc_large

Note

For all arch-specific parameters, read the wiki.

under testing

arch	option
CATANet	catanet

supported discriminators:

net	option
U-Net w/ SN	unet
PatchGAN w/ SN	patchgan
EA2FPN (bespoke, based on A2-FPN)	ea2fpn
DUnet	dunet
MetaGan	metagan

supported optimizers:

optimizer	option
Adam	Adam or adam
AdamW	AdamW or adamw
NAdam	NAdam or nadam
Adan	Adan or adan
AdamW Win2	AdamW_Win or adamw_win
ECO strategy	eco, eco_iters
AdamW Schedule-Free	adamw_sf
Adan Schedule-Free	adan_sf
F-SAM	fsam, FSAM
SOAP-SF	soap_sf

supported losses:

loss	option
L1 Loss	L1Loss, l1_loss
L2 Loss	MSELoss, mse_loss
Huber Loss	HuberLoss, huber_loss
CHC (Clipped Huber with Cosine Similarity Loss)	chc_loss
NCC (Normalized Cross-Correlation)	ncc_opt, ncc_loss
Perceptual Loss	perceptual_opt, vgg_perceptual_loss
GAN	gan_opt, gan_loss
MS-SSIM	mssim_opt mssim_loss
LDL Loss	ldl_opt, ldl_loss
Focal Frequency	ff_opt, ff_loss
DISTS	dists_opt, dists_loss
Wavelet Guided	wavelet_guided
Perceptual Patch Loss	perceptual_opt, patchloss, ipk
Consistency Loss (Oklab and CIE L*)	consistency_opt, consistency_loss
KL Divergence	kl_opt, kl_loss
MS-SWD	msswd_opt, msswd_loss
FDL + DINOv2 backend	fdl_opt, fdl_loss

supported metrics

metric	option
PSNR	calculate_psnr
SSIM	calculate_ssim
DISTS	calculate_dists
TOPIQ	calculate_topiq

supported augmentations:

augmentation	option
Rotation	use_rot
Flip	use_hflip
MixUp	mixup
CutMix	cutmix
ResizeMix	resizemix
CutBlur	cutblur

supported models:

model	description	option
Image	Base model for SISR, supports both Generator and Discriminator	image
OTF	Builds on top of image, adding Real-ESRGAN on-the-fly degradations	otf

supported dataloaders:

loader	option
Paired datasets	paired
Single datasets (for inference, no GT required)	single
Real-ESRGAN on-the-fly degradation	otf

📸 datasets

As part of neosr, we have released a series of datasets. The purpose of these datasets is to distill only the best images from the academic and community datasets. A total of 14+ datasets were manually reviewed and processed, including: Adobe-MIT-5k, RAISE, LSDIR, LIU4k-v2, KONIQ-10k, Nikon LL RAW, DIV8k, FFHQ, Flickr2k, ModernAnimation1080_v2, Rawsamples, SignatureEdits, Hasselblad raw samples and Unsplash.

• BHI series from @Phhofm. Read more about the selection process here. Full version is recommended for large networks, while small version is recommended for lightweight SISR:

dataset	download
BHI full	Release page
BHI small	Release page
BHI mini	Release page
BHI100 (val)	Release page

• Nomos-v2: contains 6000 images, multipurpose.
• nomos_uni: contains 2989 images, multipurpose. Meant to be used on lightweight networks (<800k parameters).

dataset download	sha256
nomosv2 (3GB)	sha256
nomosv2.lmdb (3GB)	sha256
nomosv2_lq_4x (187MB)	sha256
nomosv2_lq_4x.lmdb (187MB)	sha256
nomos_uni (1.3GB)	sha256
nomos_uni_lq_4x	sha256

community datasets

Datasets made by the upscaling community. More info can be found in author's repository.

• digital_art_v3: Digital art dataset from @umzi2.
• ModernAnimation_v3: High-quality modern anime dataset from Zarxrax.
• ClassicAnimation: High-quality analog (cel) anime dataset from Zarxrax.
• DF2k-BHI: a curated version of the classic DF2k dataset, made by @Phhofm.
• 4xNomosRealWeb Dataset: realistically degraded LQ's for Nomos-v2 dataset (from @Phhofm).
• FaceUp: Curated version of FFHQ.
• SSDIR: Curated version of LSDIR.
• ArtFaces: Curated version of MetFaces.
• Nature Dataset: Curated version of iNaturalist.

dataset	download
@Phhofm DF2k-BHI	HuggingFace
@Phhofm 4xNomosRealWeb	Release page
@Phhofm FaceUp	GDrive (4GB)
@Phhofm SSDIR	Gdrive (4.5GB)
@Phhofm ArtFaces	Release page
@Phhofm Nature Dataset	Release page
@umzi2 Digital Art (v3)	Release page
@Zarxrax ClassicAnimation	Release page
@Zarxrax ModernAnimation_v3	Release page

📖 resources

• Training Guide from @Sirosky
• Philip's youtube channel
• Dataset processing tools: WTP Dataset Destroyer and SR dataset creator
• OpenModelDB
• chaiNNer

📄 license and acknowledgements

Released under the Apache license. All licenses listed on license/readme. This code was originally based on BasicSR.

Thanks to victorca25/traiNNer, styler00dollar/Colab-traiNNer and timm for providing helpful insights into some problems.

Thanks to active contributors @Phhofm, @Sirosky, and @umzi2 for helping with tests and bug reporting.