# 4x Image Super-Resolution on FFHQ 256x256 noiseless (sigma\_n = 0)

Source: [4x Image Super-Resolution on FFHQ 256x256 noiseless (sigma\_n = 0)](<https://www.sota2.com/research/sota/4x-image-super-resolution-on-ffhq-256x256-noiseless-sigma_n-0>)

Collection index: [llms.txt](<https://www.sota2.com/research/llms.txt>)

Data updated: 2026-03-20T09:33:33.763Z

Evaluation of 4x Image Super-Resolution performance on the noiseless (sigma\_n = 0) version of the FFHQ 256x256 dataset, measured using PSNR, LPIPS, and FID.

A research result applies to its stated dataset, split, metric and evaluation configuration. Compare like-for-like settings, preserve the metric's unit and direction, and distinguish paper-reported results from independent reproduction. The best result recorded here is not a claim of exhaustive, current global coverage.

| Scope | Recorded value |
| --- | --- |
| Task | 4x Image Super-Resolution |
| Dataset (including any stated split) | FFHQ 256x256 noiseless (sigma\_n = 0) |
| Metric | PSNR |
| Unit | SCALAR |
| Direction | Higher is better |
| Results loaded | 9 of 9 |
| Coverage | All results currently returned for this benchmark |

Evaluation settings may differ between results. The original papers and recorded configurations are needed to establish comparability. A shared metric name alone does not establish an identical protocol.

## Metrics

- [PSNR](<https://www.sota2.com/research/sota/4x-image-super-resolution-on-ffhq-256x256-noiseless-sigma_n-0.md?metric=PSNR>): Higher is better; unit: SCALAR.

- [LPIPS](<https://www.sota2.com/research/sota/4x-image-super-resolution-on-ffhq-256x256-noiseless-sigma_n-0.md?metric=LPIPS>): Lower is better; unit: SCALAR.

- [FID](<https://www.sota2.com/research/sota/4x-image-super-resolution-on-ffhq-256x256-noiseless-sigma_n-0.md?metric=FID>): Lower is better; unit: SCALAR.

## Recorded results

| Method | PSNR | Result date | Report paper |
| --- | --- | --- | --- |
| OFTSR distilled | 31.25 | Not recorded | 68fa7b241e209131cea86cdf |
| OFTSR distilled | 29.95 | Not recorded | 68fa7b241e209131cea86cdf |
| DDNM | 29.45 | Not recorded | 68fa7b241e209131cea86cdf |
| SITCOM | 29.29 | Not recorded | 68fa7b241e209131cea86cdf |
| DiffPIR | 29.13 | Not recorded | 68fa7b241e209131cea86cdf |
| OFTSR distilled | 28.98 | Not recorded | 68fa7b241e209131cea86cdf |
| OFTSR | 28.83 | Not recorded | 68fa7b241e209131cea86cdf |
| DDRM | 28.81 | Not recorded | 68fa7b241e209131cea86cdf |
| DPS | 24.08 | Not recorded | 68fa7b241e209131cea86cdf |

### OFTSR distilled

PSNR: 31.25. Result ID: 69bd145947f34ce924a77865.

[Reporting paper](<https://www.sota2.com/research/paper/68fa7b241e209131cea86cdf.md>)

[Method origin paper](<https://www.sota2.com/research/paper/68fa7b241e209131cea86cdf.md>)

Recorded evaluation configuration: {"Training protocol":"Training based","NFEs":"1","t":"0"}. This record does not assert independent reproduction.

### OFTSR distilled

PSNR: 29.95. Result ID: 69bd145947f34ce924a77864.

[Reporting paper](<https://www.sota2.com/research/paper/68fa7b241e209131cea86cdf.md>)

[Method origin paper](<https://www.sota2.com/research/paper/68fa7b241e209131cea86cdf.md>)

Recorded evaluation configuration: {"Training protocol":"Training based","NFEs":"1","t":"0.5"}. This record does not assert independent reproduction.

### DDNM

PSNR: 29.45. Result ID: 69bd145947f34ce924a7785f.

[Reporting paper](<https://www.sota2.com/research/paper/68fa7b241e209131cea86cdf.md>)

[Method origin paper](<https://www.sota2.com/research/paper/68fa6e201e209131cea3dfb9.md>)

[Implementation](<https://github.com/wyhuai/DDNM>)

Recorded evaluation configuration: {"Training protocol":"Training free","NFEs":"100"}. This record does not assert independent reproduction.

### SITCOM

PSNR: 29.29. Result ID: 69bd145947f34ce924a77861.

[Reporting paper](<https://www.sota2.com/research/paper/68fa7b241e209131cea86cdf.md>)

[Method origin paper](<https://www.sota2.com/research/paper/68fa78db1e209131cea7ad48.md>)

Recorded evaluation configuration: {"Training protocol":"Training free","NFEs":"20"}. This record does not assert independent reproduction.

### DiffPIR

PSNR: 29.13. Result ID: 69bd145947f34ce924a77860.

[Reporting paper](<https://www.sota2.com/research/paper/68fa7b241e209131cea86cdf.md>)

[Method origin paper](<https://www.sota2.com/research/paper/68fa6f5a1e209131cea45311.md>)

Recorded evaluation configuration: {"Training protocol":"Training free","NFEs":"100"}. This record does not assert independent reproduction.

### OFTSR distilled

PSNR: 28.98. Result ID: 69bd145947f34ce924a77863.

[Reporting paper](<https://www.sota2.com/research/paper/68fa7b241e209131cea86cdf.md>)

[Method origin paper](<https://www.sota2.com/research/paper/68fa7b241e209131cea86cdf.md>)

Recorded evaluation configuration: {"Training protocol":"Training based","NFEs":"1","t":"1"}. This record does not assert independent reproduction.

### OFTSR

PSNR: 28.83. Result ID: 69bd145947f34ce924a77862.

[Reporting paper](<https://www.sota2.com/research/paper/68fa7b241e209131cea86cdf.md>)

[Method origin paper](<https://www.sota2.com/research/paper/68fa7b241e209131cea86cdf.md>)

Recorded evaluation configuration: {"Training protocol":"Training based","NFEs":"20"}. This record does not assert independent reproduction.

### DDRM

PSNR: 28.81. Result ID: 69bd145947f34ce924a7785e.

[Reporting paper](<https://www.sota2.com/research/paper/68fa7b241e209131cea86cdf.md>)

[Method origin paper](<https://www.sota2.com/research/paper/68fa6d9f1e209131cea3aea8.md>)

[Implementation](<https://github.com/bahjat-kawar/ddrm>)

Recorded evaluation configuration: {"Training protocol":"Training free","NFEs":"20"}. This record does not assert independent reproduction.

### DPS

PSNR: 24.08. Result ID: 69bd145947f34ce924a7785d.

[Reporting paper](<https://www.sota2.com/research/paper/68fa7b241e209131cea86cdf.md>)

[Method origin paper](<https://www.sota2.com/research/paper/68fa7bdd1e209131cea8adbc.md>)

Recorded evaluation configuration: {"Training protocol":"Training free","NFEs":"1000"}. This record does not assert independent reproduction.

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