# Lossless Image Compression on DIV2K 512x512 crops (test)

Source: [Lossless Image Compression on DIV2K 512x512 crops (test)](<https://www.sota2.com/research/sota/lossless-image-compression-on-div2k-512x512-crops-test>)

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

Data updated: 2026-02-26T05:42:00.207Z

Evaluation of lossless image compression performance on the test set of DIV2K images cropped to 512x512 resolution. Metrics include encoding/decoding time and bits per sub-pixel (bpsp).

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 | Lossless Image Compression |
| Dataset (including any stated split) | DIV2K 512x512 crops (test) |
| Metric | Encoding Time (s) |
| Unit | TIME |
| Direction | Lower is better |
| Results loaded | 5 of 5 |
| 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

- [Encoding Time (s)](<https://www.sota2.com/research/sota/lossless-image-compression-on-div2k-512x512-crops-test.md?metric=Encoding%20Time%20(s)>): Lower is better; unit: TIME.

- [Decoding Time (s)](<https://www.sota2.com/research/sota/lossless-image-compression-on-div2k-512x512-crops-test.md?metric=Decoding%20Time%20(s)>): Lower is better; unit: TIME.

- [Bits Per Sub-Pixel (bpsp)](<https://www.sota2.com/research/sota/lossless-image-compression-on-div2k-512x512-crops-test.md?metric=Bits%20Per%20Sub-Pixel%20(bpsp)>): Lower is better; unit: SCALAR.

## Recorded results

| Method | Encoding Time (s) | Result date | Report paper |
| --- | --- | --- | --- |
| JPEG2000 | 0.0148 | Not recorded | 68fa67201e209131cea14715 |
| WebP | 0.157 | Not recorded | 68fa67201e209131cea14715 |
| PNG | 0.213 | Not recorded | 68fa67201e209131cea14715 |
| L3C | 0.242 | Not recorded | 68fa67201e209131cea14715 |
| FLIF | 1.72 | Not recorded | 68fa67201e209131cea14715 |

### JPEG2000

Encoding Time (s): 0.0148. Result ID: 698d19b78b517eb4331f07b9.

[Reporting paper](<https://www.sota2.com/research/paper/68fa67201e209131cea14715.md>)

Recorded evaluation configuration: {"GPU":false,"CPU":true}. This record does not assert independent reproduction.

### WebP

Encoding Time (s): 0.157. Result ID: 698d19b78b517eb4331f07ba.

[Reporting paper](<https://www.sota2.com/research/paper/68fa67201e209131cea14715.md>)

Recorded evaluation configuration: {"GPU":false,"CPU":true}. This record does not assert independent reproduction.

### PNG

Encoding Time (s): 0.213. Result ID: 698d19b78b517eb4331f07b8.

[Reporting paper](<https://www.sota2.com/research/paper/68fa67201e209131cea14715.md>)

Recorded evaluation configuration: {"GPU":false,"CPU":true}. This record does not assert independent reproduction.

### L3C

Encoding Time (s): 0.242. Result ID: 698d19b78b517eb4331f07b7.

[Reporting paper](<https://www.sota2.com/research/paper/68fa67201e209131cea14715.md>)

[Method origin paper](<https://www.sota2.com/research/paper/68fa67201e209131cea14715.md>)

[Implementation](<https://www.sota2.com/github.com/fab-jul/L3C-PyTorch>)

Recorded evaluation configuration: {"GPU":true,"CPU":true}. This record does not assert independent reproduction.

### FLIF

Encoding Time (s): 1.72. Result ID: 698d19b78b517eb4331f07bb.

[Reporting paper](<https://www.sota2.com/research/paper/68fa67201e209131cea14715.md>)

Recorded evaluation configuration: {"GPU":false,"CPU":true}. This record does not assert independent reproduction.

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