super-image

State-of-the-art image super resolution models for PyTorch.

Installation

With pip:

pip install super-image

Demo

Try the various models on your images instantly.

Quick Start

Quickly utilise pre-trained models for upscaling your images 2x, 3x and 4x. See the full list of models below.

from super_image import EdsrModel, ImageLoader
from PIL import Image
import requests

url = 'https://paperswithcode.com/media/datasets/Set5-0000002728-07a9793f_zA3bDjj.jpg'
image = Image.open(requests.get(url, stream=True).raw)

model = EdsrModel.from_pretrained('eugenesiow/edsr-base', scale=2)
inputs = ImageLoader.load_image(image)
preds = model(inputs)

ImageLoader.save_image(preds, './scaled_2x.png')
ImageLoader.save_compare(inputs, preds, './scaled_2x_compare.png')

Pre-trained Models

Pre-trained models are available at various scales and hosted at the awesome huggingface_hub. By default the models were pretrained on DIV2K, a dataset of 800 high-quality (2K resolution) images for training, augmented to 4000 images and uses a dev set of 100 validation images (images numbered 801 to 900).

The leaderboard below shows the PSNR / SSIM metrics for each model at various scales on various test sets (Set5, Set14, BSD100, Urban100). The higher the better. All training was to 1000 epochs (some publications, like a2n, train to >1000 epochs in their experiments).

Scale x2

Rank	Model	Params	Set5	Set14	BSD100	Urban100
1	drln-bam	34m	38.23/0.9614	33.95/0.9206	33.95/0.9269	32.81/0.9339
2	edsr	41m	38.19/0.9612	33.99/0.9215	33.89/0.9266	32.68/0.9331
3	msrn	5.9m	38.08/0.9609	33.75/0.9183	33.82/0.9258	32.14/0.9287
4	mdsr	2.7m	38.04/0.9608	33.71/0.9184	33.79/0.9256	32.14/0.9283
5	msrn-bam	5.9m	38.02/0.9608	33.73/0.9186	33.78/0.9253	32.08/0.9276
6	edsr-base	1.5m	38.02/0.9607	33.66/0.9180	33.77/0.9254	32.04/0.9276
7	mdsr-bam	2.7m	38/0.9607	33.68/0.9182	33.77/0.9253	32.04/0.9272
8	awsrn-bam	1.4m	37.99/0.9606	33.66/0.918	33.76/0.9253	31.95/0.9265
9	a2n	1.0m	37.87/0.9602	33.54/0.9171	33.67/0.9244	31.71/0.9240
10	carn	1.6m	37.89/0.9602	33.53/0.9173	33.66/0.9242	31.62/0.9229
11	carn-bam	1.6m	37.83/0.96	33.51/0.9166	33.64/0.924	31.53/0.922
12	pan	260k	37.77/0.9599	33.42/0.9162	33.6/0.9235	31.31/0.9197
13	pan-bam	260k	37.7/0.9596	33.4/0.9161	33.6/0.9234	31.35/0.92

Scale x3

Rank	Model	Params	Set5	Set14	BSD100	Urban100
1	drln-bam	34m	35.3/0.9422	31.27/0.8624	29.78/0.8224	29.82/0.8828
1	edsr	44m	35.31/0.9421	31.18/0.862	29.77/0.8224	29.75/0.8825
1	msrn	6.1m	35.12/0.9409	31.08/0.8593	29.67/0.8198	29.31/0.8743
2	mdsr	2.9m	35.11/0.9406	31.06/0.8593	29.66/0.8196	29.29/0.8738
3	msrn-bam	5.9m	35.13/0.9408	31.06/0.8588	29.65/0.8196	29.26/0.8736
4	mdsr-bam	2.9m	35.07/0.9402	31.04/0.8582	29.62/0.8188	29.16/0.8717
5	edsr-base	1.5m	35.01/0.9402	31.01/0.8583	29.63/0.8190	29.19/0.8722
6	awsrn-bam	1.5m	35.05/0.9403	31.01/0.8581	29.63/0.8188	29.14/0.871
7	carn	1.6m	34.88/0.9391	30.93/0.8566	29.56/0.8173	28.95/0.867
8	a2n	1.0m	34.8/0.9387	30.94/0.8568	29.56/0.8173	28.95/0.8671
9	carn-bam	1.6m	34.82/0.9385	30.9/0.8558	29.54/0.8166	28.84/0.8648
10	pan-bam	260k	34.62/0.9371	30.83/0.8545	29.47/0.8153	28.64/0.861
11	pan	260k	34.64/0.9376	30.8/0.8544	29.47/0.815	28.61/0.8603

Scale x4

Rank	Model	Params	Set5	Set14	BSD100	Urban100
1	drln	35m	32.55/0.899	28.96/0.7901	28.65/0.7692	26.56/0.7998
2	drln-bam	34m	32.49/0.8986	28.94/0.7899	28.63/0.7686	26.53/0.7991
3	edsr	43m	32.5/0.8986	28.92/0.7899	28.62/0.7689	26.53/0.7995
4	msrn	6.1m	32.19/0.8951	28.78/0.7862	28.53/0.7657	26.12/0.7866
5	msrn-bam	5.9m	32.26/0.8955	28.78/0.7859	28.51/0.7651	26.10/0.7857
6	mdsr	2.8m	32.26/0.8953	28.77/0.7856	28.53/0.7653	26.07/0.7851
7	mdsr-bam	2.9m	32.19/0.8949	28.73/0.7847	28.50/0.7645	26.02/0.7834
8	awsrn-bam	1.6m	32.13/0.8947	28.75/0.7851	28.51/0.7647	26.03/0.7838
9	edsr-base	1.5m	32.12/0.8947	28.72/0.7845	28.50/0.7644	26.02/0.7832
10	a2n	1.0m	32.07/0.8933	28.68/0.7830	28.44/0.7624	25.89/0.7787
11	carn	1.6m	32.05/0.8931	28.67/0.7828	28.44/0.7625	25.85/0.7768
12	carn-bam	1.6m	32.0/0.8923	28.62/0.7822	28.41/0.7614	25.77/0.7741
13	pan	270k	31.92/0.8915	28.57/0.7802	28.35/0.7595	25.63/0.7692
14	pan-bam	270k	31.9/0.8911	28.54/0.7795	28.32/0.7591	25.6/0.7691
15	han	16m	31.21/0.8778	28.18/0.7712	28.09/0.7533	25.1/0.7497
16	rcan-bam	15m	30.8/0.8701	27.91/0.7648	27.91/0.7477	24.75/0.7346

You can find a notebook to easily run evaluation on pretrained models below:

Train Models

We need the huggingface datasets library to download the data:

pip install datasets

The following code gets the data and preprocesses/augments the data.

from datasets import load_dataset
from super_image.data import EvalDataset, TrainDataset, augment_five_crop

augmented_dataset = load_dataset('eugenesiow/Div2k', 'bicubic_x4', split='train')\
    .map(augment_five_crop, batched=True, desc="Augmenting Dataset")                                # download and augment the data with the five_crop method
train_dataset = TrainDataset(augmented_dataset)                                                     # prepare the train dataset for loading PyTorch DataLoader
eval_dataset = EvalDataset(load_dataset('eugenesiow/Div2k', 'bicubic_x4', split='validation'))      # prepare the eval dataset for the PyTorch DataLoader

The training code is provided below:

from super_image import Trainer, TrainingArguments, EdsrModel, EdsrConfig

training_args = TrainingArguments(
    output_dir='./results',                 # output directory
    num_train_epochs=1000,                  # total number of training epochs
)

config = EdsrConfig(
    scale=4,                                # train a model to upscale 4x
)
model = EdsrModel(config)

trainer = Trainer(
    model=model,                         # the instantiated model to be trained
    args=training_args,                  # training arguments, defined above
    train_dataset=train_dataset,         # training dataset
    eval_dataset=eval_dataset            # evaluation dataset
)

trainer.train()