Datasets:
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# Dataset Card for "notMNIST"
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---
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# Dataset Card for "notMNIST"
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## Overview
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The notMNIST dataset is a collection of images of letters from A to J in various fonts. It is designed as a more challenging alternative to the traditional MNIST dataset, which consists of handwritten digits. The notMNIST dataset is commonly used in machine learning and computer vision tasks for character recognition.
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## Dataset Information
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Number of Classes: 10 (A to J)
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Number of Samples: 187,24
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Image Size: 28 x 28 pixels
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Color Channels: Grayscale
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## Dataset Structure
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The dataset is split into a training set and a test set. Each class has its own subdirectory containing images of that class. The directory structure is as follows:
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notMNIST/
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|-- train/
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| |-- A/
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| |-- B/
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| |-- ...
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| |-- J/
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|-- test/
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| |-- A/
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| |-- B/
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| |-- ...
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| |-- J/
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## Acknowledgements
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http://yaroslavvb.blogspot.com/2011/09/notmnist-dataset.html
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https://www.kaggle.com/datasets/lubaroli/notmnist
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## Inspiration
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This is a pretty good dataset to train classifiers! According to Yaroslav:
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Judging by the examples, one would expect this to be a harder task
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than MNIST. This seems to be the case -- logistic regression on top of
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stacked auto-encoder with fine-tuning gets about 89% accuracy whereas
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same approach gives got 98% on MNIST. Dataset consists of small
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hand-cleaned part, about 19k instances, and large uncleaned dataset,
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500k instances. Two parts have approximately 0.5% and 6.5% label error
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rate. I got this by looking through glyphs and counting how often my
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guess of the letter didn't match it's unicode value in the font file.
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