EMNIST

The EMNIST dataset is a set of handwritten character digits derived from the NIST Special Database 19 and converted to a 28x28 pixel image format and dataset structure that directly matches the MNIST dataset . Further information on the dataset contents and conversion process can be found in the paper available at here. There are six different splits provided in this dataset. A short summary of the dataset is provided below: The full complement of the NIST Special Database 19 is available in the ByClass and ByMerge splits. The EMNIST Balanced dataset contains a set of characters with an equal number of samples per class. The EMNIST Letters dataset merges a balanced set of the uppercase and lowercase letters into a single 26-class task. The EMNIST Digits and EMNIST MNIST dataset provide balanced handwritten digit datasets directly compatible with the original MNIST dataset. Please refer to the EMNIST paper [PDF, BIB]for further details of the dataset structure.

EMNIST数据集（EMNIST dataset）是从美国国家标准与技术研究院（National Institute of Standards and Technology, NIST）Special Database 19中提取的手写字符与数字集合，被转换为28×28像素的图像格式，且采用与MNIST数据集完全匹配的数据集结构。有关该数据集的内容与转换流程的更多细节，可通过此处公开的学术论文查阅。该数据集共提供六种不同的划分方案，下文将对其进行简要概述：NIST Special Database 19的完整全集包含于ByClass与ByMerge两种划分中。EMNIST Balanced数据集为每个字符类别配置了等量的样本数据。EMNIST Letters数据集将均衡分布的大写与小写字母合并为一个包含26个类别的分类任务。EMNIST Digits与EMNIST MNIST数据集则提供了可直接兼容原始MNIST数据集的均衡手写数字数据集。如需了解数据集结构的更多细节，请参阅EMNIST相关论文[PDF, BIB]。

搜集汇总

背景与挑战

背景概述

EMNIST是一个手写字符数据集，源自NIST Special Database 19，图像格式为28x28像素，结构与MNIST数据集直接匹配。它提供六个不同划分，包括ByClass、ByMerge、Balanced、Letters、Digits和MNIST，涵盖从62个不平衡类别到10个平衡类别的多种任务，适用于字符和数字识别研究。