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alphabet_recognition

Google Colab

Abstract

專案使用的資料來源於Kaggle的A-Z Handwritten Alphabets in .csv format(https://www.kaggle.com/sachinpatel21/az-handwritten-alphabets-in-csv-format#A_Z%20Handwritten%20Data.csv),此數據集約有260000筆訓練資料,110000筆測試資料,下為模型效能。

Train dataset accuracy: 0.8658
Test dataset accuracy: 0.8623

Model

模型由2層全連接層組成,使用ReLU和Softmax作為激活函數,並使用Dropout降低過度凝合(over fitting)增加泛化能力。

Train

使用訓練集中所有資料做訓練共60000筆資料,每個類別平均10000筆資料,其中,字母I和F資料量最少約700筆,因此必須將資料做平衡後再訓練神經網路,未來將加入平衡數據的功能。

Predict

給予資料,模型便會計算並輸出所有類別的機率,從中選擇機率最大值,並輸出該類別。

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