Datasets › Letter
Letter (Letter Recognition Data Set)
Letter Recognition Data Set is a handwritten digit dataset. The task is to identify each of a large number of black-and-white rectangular pixel displays as one of the 26 capital letters in the English alphabet. The character images were based on 20 different fonts and each letter within these 20 fonts was randomly distorted to produce a file of 20,000 unique stimuli. Each stimulus was converted into 16 primitive numerical attributes (statistical moments and edge counts) which were then scaled to fit into a range of integer values from 0 through 15.
Source: UCL Machine Learning Repository Letter Recognition Image Source: http://www.cs.uu.nl/docs/vakken/mpr/Frey-Slate.pdf
Benchmarks archive 2025-07-28
All 2 leaderboards whose dataset resolves to this page shown (sort by any header). "First row" is the archive's own first row at snapshot, in the archive's row order; nothing here re-ranks and metric direction is not asserted.
| First row (archive order) | Paper | Code | ||||
|---|---|---|---|---|---|---|
| Image Clustering | LetterA-J | DDC-DA Accuracy 0.691 | Deep Density-based Image Clustering | Yazhou-Ren/DDC | 2 | Compare |
| Core set discovery | Letter | EvoCore F1(10-fold) 65.9 | Uncovering Coresets for Classification With... | pietrobarbiero/meco | 1 | Compare |
Papers archive 2025-07-28
2 shown of 2 papers with a leaderboard row on this dataset's benchmarks, newest first. The archive's own "papers using this dataset" list was never published, so this is the benchmark-backed subset; the archive's count for this dataset is 49. The Syntology column is from Syntology's graph (read 2026-09-24), stated per sample; it is not part of any archive number.
| Date | Samples run Syntology | |||
|---|---|---|---|---|
| Uncovering Coresets for Classification With Multi-Objective Evolutionary Algorithms | 1 | 1 | 20 Feb 2020 | not harvested |
| Deep Density-based Image Clustering | 1 | 2 | 11 Dec 2018 | not harvested |
Dataset loaders archive 2025-07-28
No loader listed in the archive.
Tasks archive 2025-07-28
License archive 2025-07-28
Unknown
Modalities archive 2025-07-28
Languages archive 2025-07-28
Variants archive 2025-07-28
- LetterA-J
- Letter
2 variant names, as the archive lists them.
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