手写数字图像识别（图像数据集+MATLAB源代码）
模式识别高分课程设计，利用BP神经网络对0-9的手写数字图像数据进行分类。
图像数据存放在Img的文件夹中，0-9每个数字各有55个样本，共550个图像样本数据。文件中的all_data.mat是为了对这些图像数据全部提取到MATLAB的工作区中，以便于MATLAB对数据的处理。载入后是一个4维的900×1200×10×55的阵列，900×1200为每一张图像的尺寸/分辨率，10指的是为0-9的10类图像，55是每一类的样本数目；
代码中有详细注释，整个过程分为：①载入图像数据；②裁剪图像的无效信息；③特征选择和提取；④特征预处理；⑤划分数据集；⑥网络训练；⑦网络测试；⑧用户验证过程
网络经多次测试后对训练样本和测试样本的分类准确率均在95%以上，MATLAB自建BP神经网络，代码每个过程都有注释详解，有利于读者对BP神经网络有更好的把握。
在用户验证过程中，向客户提供验证端口，读者在读懂代码的基础上，可以继续在此做一个UI界面或者接口，作为课程设计的话将会更加完善。
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