# Federated Image Classification on FEMNIST non-i.i.d. (test)

Source: [Federated Image Classification on FEMNIST non-i.i.d. (test)](<https://www.sota2.com/research/sota/federated-image-classification-on-femnist-non-i-i-d-test>)

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

Data updated: 2026-02-26T06:06:15.189Z

Evaluation of Federated Image Classification performance on the non-i.i.d. split of the FEMNIST dataset, measured by test error.

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 | Federated Image Classification |
| Dataset (including any stated split) | FEMNIST non-i.i.d. |
| Metric | Test Error |
| Unit | PERCENT |
| Direction | Lower is better |
| Results loaded | 8 of 8 |
| 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

- [Test Error](<https://www.sota2.com/research/sota/federated-image-classification-on-femnist-non-i-i-d-test.md?metric=Test%20Error>): Lower is better; unit: PERCENT.

## Recorded results

| Method | Test Error | Result date | Report paper |
| --- | --- | --- | --- |
| FedEx | 14.76 | Not recorded | 68fa6b2a1e209131cea2c751 |
| Successive Halving | 14.78 | Not recorded | 68fa6b2a1e209131cea2c751 |
| FedEx | 15.93 | Not recorded | 68fa6b2a1e209131cea2c751 |
| Random Search | 17.77 | Not recorded | 68fa6b2a1e209131cea2c751 |
| FedEx | 19.43 | Not recorded | 68fa6b2a1e209131cea2c751 |
| Successive Halving | 20.3 | Not recorded | 68fa6b2a1e209131cea2c751 |
| FedEx | 22.3 | Not recorded | 68fa6b2a1e209131cea2c751 |
| Random Search | 22.98 | Not recorded | 68fa6b2a1e209131cea2c751 |

### FedEx

Test Error: 14.76. Result ID: 698e63caffc3901de09d31dd.

[Reporting paper](<https://www.sota2.com/research/paper/68fa6b2a1e209131cea2c751.md>)

[Method origin paper](<https://www.sota2.com/research/paper/68fa6b2a1e209131cea2c751.md>)

[Implementation](<https://github.com/mkhodak/fedex>)

Recorded evaluation configuration: {"Wrapper method":"Successive Halving (SHA)","Target model":"personalized","Tuning scope":"client (server tuned by SHA)"}. This record does not assert independent reproduction.

### Successive Halving

Test Error: 14.78. Result ID: 698e63caffc3901de09d31dc.

[Reporting paper](<https://www.sota2.com/research/paper/68fa6b2a1e209131cea2c751.md>)

[Method origin paper](<https://www.sota2.com/research/paper/68fa647b1e209131cea04b80.md>)

Recorded evaluation configuration: {"Wrapper method":"Successive Halving (SHA)","Target model":"personalized","Tuning scope":"server & client"}. This record does not assert independent reproduction.

### FedEx

Test Error: 15.93. Result ID: 698e63caffc3901de09d31d9.

[Reporting paper](<https://www.sota2.com/research/paper/68fa6b2a1e209131cea2c751.md>)

[Method origin paper](<https://www.sota2.com/research/paper/68fa6b2a1e209131cea2c751.md>)

[Implementation](<https://github.com/mkhodak/fedex>)

Recorded evaluation configuration: {"Wrapper method":"Random Search (RS)","Target model":"personalized","Tuning scope":"client (server tuned by RS)"}. This record does not assert independent reproduction.

### Random Search

Test Error: 17.77. Result ID: 698e63caffc3901de09d31d8.

[Reporting paper](<https://www.sota2.com/research/paper/68fa6b2a1e209131cea2c751.md>)

Recorded evaluation configuration: {"Wrapper method":"Random Search (RS)","Target model":"personalized","Tuning scope":"server & client"}. This record does not assert independent reproduction.

### FedEx

Test Error: 19.43. Result ID: 698e63caffc3901de09d31db.

[Reporting paper](<https://www.sota2.com/research/paper/68fa6b2a1e209131cea2c751.md>)

[Method origin paper](<https://www.sota2.com/research/paper/68fa6b2a1e209131cea2c751.md>)

[Implementation](<https://github.com/mkhodak/fedex>)

Recorded evaluation configuration: {"Wrapper method":"Successive Halving (SHA)","Target model":"global","Tuning scope":"client (server tuned by SHA)"}. This record does not assert independent reproduction.

### Successive Halving

Test Error: 20.3. Result ID: 698e63caffc3901de09d31da.

[Reporting paper](<https://www.sota2.com/research/paper/68fa6b2a1e209131cea2c751.md>)

[Method origin paper](<https://www.sota2.com/research/paper/68fa647b1e209131cea04b80.md>)

Recorded evaluation configuration: {"Wrapper method":"Successive Halving (SHA)","Target model":"global","Tuning scope":"server & client"}. This record does not assert independent reproduction.

### FedEx

Test Error: 22.3. Result ID: 698e63caffc3901de09d31d7.

[Reporting paper](<https://www.sota2.com/research/paper/68fa6b2a1e209131cea2c751.md>)

[Method origin paper](<https://www.sota2.com/research/paper/68fa6b2a1e209131cea2c751.md>)

[Implementation](<https://github.com/mkhodak/fedex>)

Recorded evaluation configuration: {"Wrapper method":"Random Search (RS)","Target model":"global","Tuning scope":"client (server tuned by RS)"}. This record does not assert independent reproduction.

### Random Search

Test Error: 22.98. Result ID: 698e63caffc3901de09d31d6.

[Reporting paper](<https://www.sota2.com/research/paper/68fa6b2a1e209131cea2c751.md>)

Recorded evaluation configuration: {"Wrapper method":"Random Search (RS)","Target model":"global","Tuning scope":"server & client"}. This record does not assert independent reproduction.

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