OPENCV KNN 手寫數字辨識

資料來源:
https://blog.csdn.net/chaipp0607/article/details/77966888
https://blog.csdn.net/akadiao/article/details/79243651
https://blog.csdn.net/akadiao/article/details/79236458

opencv249_knn_digital_number01[從原圖產生KNN所需訓練圖檔]-彩色轉灰階cvtColor、圖片定位+切割copyTo、圖片存檔imwrite
opencv249_knn_digital_number02[從訓練圖檔實現KNN手寫數字辨識]-把圖形資料從RGB變成32F的格式convertTo、把M*N的圖像變成一維數列reshape、KNN分類器CvKNearest