#include?“Knn.h“

Knn::Knn（QWidget?*parent）
	:?QWidget（parent）
{
	ui.setupUi（this）;

	ui.bRecognize->setEnabled（false）;
	connect（ui.bTrain		?SIGNAL（clicked（））?this?SLOT（onTrain（）））;
	connect（ui.bRecognize	?SIGNAL（clicked（））?this?SLOT（onRecognize（）））;
	connect（ui.bClear		?SIGNAL（clicked（））?this?SLOT（onClearImage（）））;
	onClearImage（）;
}

void?Knn::onTrain（）{

	Mat?digitsSet?=?imread（“digits.png“）;
	Mat?gray;
	cvtColor（digitsSet?gray?CV_BGR2GRAY）;

	threshold（gray?gray?0?255?CV_THRESH_BINARY）;
	//?digits.png為2000?*?1000，其中每個(gè)數(shù)字的大小為20?*?20，則總共有5000（（2000*1000）?/?（20*20））個(gè)數(shù)字
	//?對(duì)其分割成單個(gè)20?*?20的圖像并序列化成（轉(zhuǎn)化成一個(gè)一維的數(shù)組）
	int?side?=?20;
	int?m?=?gray.rows?/?side;
	int?n?=?gray.cols?/?side;	
	Mat?data?labels;			
	for?（int?i?=?0;?i?
		ui.lState->setText（QString（“Trainning?%1“）.arg（i/5））;

		int?offsetRow?=?i?*?side;				
		for?（int?j?=?0;?j?
			int?offsetCol?=?j?*?side;		
			//?截取20*20的小塊
			Mat?tmp;
			gray（Range（offsetRow?offsetRow?+?side）?Range（offsetCol?offsetCol?+?side））.copyTo（tmp）;
			data.push_back（tmp.reshape（0?1））;??//?序列化轉(zhuǎn)換成一個(gè)一維向量
			labels.push_back（i?/?5）;			

			QImage?image?=?CvMat2QImage（tmp）;
			QPixmap?pixmap?=?QPixmap::fromImage（image）;
			ui.label->setPixmap（pixmap.scaled（ui.label->size（）））;
			sleep（1）;
		}
	}
	data.convertTo（data?CV_32F）;	
	
	//?使用KNN算法訓(xùn)練
	int?K?=?51;
	Ptr?tData?=?TrainData::create（data?ROW_SAMPLE?labels）;
	model?=?KNearest::create（）;
	model->setDefaultK（K）;
	model->setIsClassifier（true）;
	model->train（tData）;

	ui.bRecognize->setEnabled（true）;
	ui.bTrain->setEnabled（false）;
	ui.lState->setText（“Train?OK!“）;
}

void?Knn::onRecognize（）{

	ui.bRecognize->setEnabled（false）;
	Mat?zoom;
	zoom?=?zoomImage（0.1?frame）;
	Mat?reshapeImage?=?zoom.reshape（0?1）;
	reshapeImage.convertTo（reshapeImage?CV_32F）;
	float?r?=?model->predict（reshapeImage）;???
	ui.labelResult->setText（QString（“%1“）.arg（r））;
	ui.bRecognize->setEnabled（true）;
}

void?Knn::onClearImage（）{

	frame?=?Mat::zeros（200?200?CV_8UC1）;
	QImage?image?=?CvMat2QImage（frame）;
	QPixmap?pixmap?=?QPixmap::fromImage（image）;
	ui.label->setPixmap（pixmap.scaled（ui.label->size（）））;
}

QImage?Knn::CvMat2QImage（const?cv::Mat&?mat）{

	if?（mat.type（）?==?CV_8UC1）{

		QImage?image（mat.cols?mat.rows?QImage::Format_Indexed8）;
		image.setColorCount（256）;
		for?（int?i?=?0;?i?			image.setColor（i?qRgb（i?i?i））;
		}
		uchar?*pSrc?=?mat.data;
		for?（int?row?=?0;?row?			uchar?*pDest?=?image.scanLine（row）;
			memcpy（pDest?pSrc?mat.cols）;
			pSrc?+=?mat.step;
		}
		return?image;
	}
	else?if?（mat.type（）?==?CV_8UC3）{

		const?uchar?*pSrc?=?（const?uchar*）mat.data;
		QImage?image（pSrc?mat.cols?mat.rows?mat.step?QImage::Format_RGB888）;
		return?image.rgbSwapped（）;
	}
	else?if?（mat.type（）?==?CV_8UC4）{

		const?uchar?*pSrc?=?（const?uchar*）mat.data;
		QImage?image（pSrc?mat.cols?mat.rows?mat.step?QIma

?屬性????????????大小?????日期????時(shí)間???名稱
-----------?---------??----------?-----??----

?????文件???????1463??2018-03-28?16:22??KNN數(shù)字識(shí)別\Knn\Debug\Knn.Build.CppClean.log

?????文件?????????86??2018-03-28?16:22??KNN數(shù)字識(shí)別\Knn\Debug\Knn.log

?????文件?????721129??2014-11-06?08:49??KNN數(shù)字識(shí)別\Knn\digits.png

?????文件???????1372??2018-03-28?16:24??KNN數(shù)字識(shí)別\Knn\GeneratedFiles\qrc_Knn.cpp

?????文件???????3681??2018-03-28?16:24??KNN數(shù)字識(shí)別\Knn\GeneratedFiles\Release\moc_Knn.cpp

?????文件???????5495??2018-03-28?16:29??KNN數(shù)字識(shí)別\Knn\GeneratedFiles\ui_Knn.h

?????文件???????5341??2018-03-28?16:20??KNN數(shù)字識(shí)別\Knn\Knn.cpp

?????文件???????1244??2018-03-28?16:04??KNN數(shù)字識(shí)別\Knn\Knn.h

?????文件?????????63??2018-03-27?14:41??KNN數(shù)字識(shí)別\Knn\Knn.qrc

?????文件???????4780??2018-03-28?16:29??KNN數(shù)字識(shí)別\Knn\Knn.ui

?????文件??????10438??2018-03-28?16:24??KNN數(shù)字識(shí)別\Knn\Knn.vcxproj

?????文件???????2910??2018-03-27?14:41??KNN數(shù)字識(shí)別\Knn\Knn.vcxproj.filters

?????文件????????713??2018-03-28?08:09??KNN數(shù)字識(shí)別\Knn\Knn.vcxproj.user

?????文件????????177??2018-03-27?14:40??KNN數(shù)字識(shí)別\Knn\main.cpp

?????文件???????4273??2018-03-28?16:29??KNN數(shù)字識(shí)別\Knn\Release\Knn.log

?????文件?????200837??2018-03-28?16:29??KNN數(shù)字識(shí)別\Knn\Release\Knn.obj

?????文件???????6198??2018-03-28?16:29??KNN數(shù)字識(shí)別\Knn\Release\Knn.tlog\cl.command.1.tlog

?????文件?????124022??2018-03-28?16:29??KNN數(shù)字識(shí)別\Knn\Release\Knn.tlog\CL.read.1.tlog

?????文件????????690??2018-03-28?16:29??KNN數(shù)字識(shí)別\Knn\Release\Knn.tlog\CL.write.1.tlog

?????文件???????2092??2018-03-28?16:29??KNN數(shù)字識(shí)別\Knn\Release\Knn.tlog\custombuild.command.1.tlog

?????文件????????402??2018-03-28?16:29??KNN數(shù)字識(shí)別\Knn\Release\Knn.tlog\custombuild.read.1.tlog

?????文件????????510??2018-03-28?16:29??KNN數(shù)字識(shí)別\Knn\Release\Knn.tlog\custombuild.write.1.tlog

?????文件????????154??2018-03-28?16:29??KNN數(shù)字識(shí)別\Knn\Release\Knn.tlog\Knn.lastbuildstate

?????文件???????1736??2018-03-28?16:29??KNN數(shù)字識(shí)別\Knn\Release\Knn.tlog\link.command.1.tlog

?????文件???????3800??2018-03-28?16:29??KNN數(shù)字識(shí)別\Knn\Release\Knn.tlog\link.read.1.tlog

?????文件????????420??2018-03-28?16:29??KNN數(shù)字識(shí)別\Knn\Release\Knn.tlog\link.write.1.tlog

?????文件?????113609??2018-03-28?16:29??KNN數(shù)字識(shí)別\Knn\Release\main.obj

?????文件?????112845??2018-03-28?16:29??KNN數(shù)字識(shí)別\Knn\Release\moc_Knn.obj

?????文件???????2137??2018-03-28?16:24??KNN數(shù)字識(shí)別\Knn\Release\qrc_Knn.obj

????..A..H.????????42??2018-03-28?15:46??KNN數(shù)字識(shí)別\Knn.opensdf

............此處省略40個(gè)文件信息