MareArts Computer Vision Study.: 2017.01

1/31/2017

Including VTK when building opencv

First, we download VTK and build it.
http://www.vtk.org/download/

and
We set the path where VTK is built, when we build opencv.

Note that, we need to include the build path, not the installed path.

http://cvlecture.marearts.com/2016/12/opencv-build-shared-opencv.html
If you go to the above address, I have built VTK 7.1.
And new content will continue to be added.

Good luck!

1/19/2017

OpenCV add, subtract, multiply, divide operation image and scalar, example code

opencv lecture 4-1
example code

< gist start >

	http://study.marearts.com/2017/01/opencv-add-subtract-multiply-divide.html
	http://cvlecture.marearts.com/2017/01/opencv-4-3.html

	#include "opencv2/opencv.hpp"
	#include "opencv2/cuda.hpp"
	#include "opencv2\cudaarithm.hpp"

	#include <iostream>

	using namespace std;
	using namespace cv;

	//TBB need for using this
	class Parallel_process : public cv::ParallelLoopBody
	{

	private:
	cv::Mat& inImg;
	cv::Mat& outImg;
	int widhStep;
	int m_stride;
	cv::Scalar scalar; //B,G,R

	public:
	Parallel_process(cv::Mat& inputImgage, Mat& outImage, Scalar& inScalar)
	: inImg(inputImgage), outImg(outImage), scalar(inScalar){

	widhStep = inputImgage.size().width * 3;
	m_stride = inputImgage.size().width * 2;


	}

	virtual void operator()(const cv::Range& range) const
	{
	//thread
	for (int i = range.start; i < range.end; i++)
	{

	int s1 = i*widhStep;

	for (int iw = 0; iw< inImg.size().width; iw++)
	{
	int s2 = iw * 3;
	int mc = s1 + s2;

	unsigned char B1 = (unsigned char)(inImg.data[mc + 0]);
	unsigned char G1 = (unsigned char)(inImg.data[mc + 1]);
	unsigned char R1 = (unsigned char)(inImg.data[mc + 2]);

	int B2 = B1 + scalar[0];
	int G2 = G1 + scalar[1];
	int R2 = R1 + scalar[2];

	if (B2 > 255)
	B2 = 255;
	if (G2 > 255)
	G2 = 255;
	if (R2 > 255)
	R2 = 255;

	if (B2 < 0)
	B2 = 0;
	if (G2 < 0)
	G2 = 0;
	if (R2 < 0)
	R2 = 0;


	outImg.data[mc + 0] = B2;
	outImg.data[mc + 1] = G2;
	outImg.data[mc + 2] = R2;
	}
	}
	}
	};

	int main(int, char)
	{

	Mat img = imread("scret.jpg");
	Mat img_add;
	Mat img_absdiff;
	Mat img_subtract;
	Mat img_mul;
	Mat img_div;
	Mat img_parallel;

	unsigned long AAtime = 0, BBtime = 0; //check processing time


	//cpu add
	AAtime = getTickCount();
	add(img, Scalar(200, 200, 200), img_add); //Value is between 0 and 255
	//img_add = img + Scalar(200, 200, 200);
	BBtime = getTickCount();
	printf("add cpu %.2lf sec \n", (BBtime - AAtime) / getTickFrequency()); //check processing time


	//cpu subtraction
	AAtime = getTickCount();
	subtract(img, Scalar(200, 200, 200), img_subtract); //Value is between 0 and 255
	//img_subtract = img - Scalar(200, 200, 200)
	BBtime = getTickCount();
	printf("subtract %.2lf sec \n", (BBtime - AAtime) / getTickFrequency()); //check processing time


	//cpu absdiff
	AAtime = getTickCount();
	absdiff(img, Scalar(200, 200, 200), img_absdiff); //Value is between 0 and 255
	BBtime = getTickCount();
	printf("absdiff %.2lf sec \n", (BBtime - AAtime) / getTickFrequency()); //check processing time


	//cpu *, /
	multiply(img, 20, img_mul);
	divide(img, 20, img_div);
	//img_mul = img * 20;
	//img_div = img / 20;



	cuda::GpuMat gimg;
	cuda::GpuMat gout1, gout2;
	//gpu add
	gimg.upload(img);
	cuda::absdiff(gimg, Scalar(10, 2, 100), gout1);
	cuda::add(gimg, Scalar(-200, -200, -200), gout2);


	//tbb
	AAtime = getTickCount();
	img_parallel = Mat(img.size(), img.type());
	cv::parallel_for_(cv::Range(0, img.rows), Parallel_process(img, img_parallel, Scalar(-200, -200, -200)));
	BBtime = getTickCount();
	printf("parallel %.2lf sec \n", (BBtime - AAtime) / getTickFrequency()); //check processing time

	imshow("img", img);
	imshow("img_add", img_add);
	imshow("img_absdiff", img_absdiff);
	imshow("img_subtract", img_subtract);
	imshow("img_mul", img_mul);
	imshow("img_div", img_div);
	imshow("img_parallel", img_parallel);

	waitKey(0);

	return 0;
	}

view raw pointProcessing_1.cpp hosted with ❤ by GitHub

< gist end >

1/11/2017

MFC, CIPAddressCtrl ctrol, ip address set, get, using BYTE and CString

usage for CIPAddressCtrl in mfc

< gist code >

	http://study.marearts.com/2017/01/mfc-cipaddressctrl-ctrol-ip-address-set.html
	.....................................................................
	//set, get code
	//get address to Cstring
	CString ipaddress;
	BYTE ip[4];
	m_ServeripAddress.GetAddress(ip[0], ip[1], ip[2], ip[3]);
	ipaddress.Format(_T("%d.%d.%d.%d"), ip[0], ip[1], ip[2], ip[3]);


	//set and get address to byte
	BYTE gip[4];
	getipABCD(ipaddress, gip[0], gip[1], gip[2], gip[3]);
	m_ServeripAddress.SetAddress(gip[0], gip[1], gip[2], gip[3]);
	.....................................................................



	void getipABCD(CString in, BYTE &a, BYTE &b, BYTE &c, BYTE &d)
	{

	char* szIpAddress = WtoC(in);
	BYTE m_IpAddr[4] = { 0, };

	char *p;
	int i = 0;
	p = strtok(szIpAddress, ".");
	m_IpAddr[i] = atoi(p);
	while (p != NULL)
	{
	i++;
	p = strtok(NULL, ".");
	if (p)
	m_IpAddr[i] = atoi(p);
	}

	a = m_IpAddr[0];
	b = m_IpAddr[1];
	c = m_IpAddr[2];
	d = m_IpAddr[3];

	}

view raw CIPAddressCtrl_setgetAddress.cpp hosted with ❤ by GitHub

< end >

1/05/2017

OpenCV Trackbar Exmaple source code

< git hub - gits >


	http://study.marearts.com/2017/01/opencv-trackbar-exmaple-source-code.html
	#include "opencv2/opencv.hpp"
	#include < iostream>
	using namespace cv;
	using namespace std;

	int g_slider; //slider pos value
	int g_slider_max; //slider max value

	void on_trackbar(int, void*)
	{
	if (g_slider % 2 == 0)
	g_slider = g_slider + 1;

	printf("%d\n", g_slider);
	}

	int main()
	{

	// Read image from file
	Mat img = imread("anapji.jpg");
	Mat img2;

	//set
	g_slider = 0;
	g_slider_max = 21;

	//window name
	namedWindow("My Window", 1);

	//make trackbar call back
	createTrackbar("TrackbarName", "My Window", &g_slider, g_slider_max, on_trackbar);

	//show the image
	while (1)
	{
	Sobel(img, img2, CV_8U, 1, 0, g_slider);
	imshow("My Window", img2);
	// Wait until user press some key
	int r = waitKey(10);
	if (r > 0)
	break;
	}

	return 0;
	}

view raw OpenCVSimpleTrackbar2.cpp hosted with ❤ by GitHub

///

another examples..

simple trackbar ex) in image
http://study.marearts.com/2016/07/opencv-30-trackbar-usage-simple-example.html

simple trackbar ex) in video
http://study.marearts.com/2016/07/opencv-30-trackbar-simple-example-in.html

QString to string, string to QString

simple example code
< github >

	http://study.marearts.com/2017/01/qstring-to-string-string-to-qstring.html
	//string to QString
	QString str = QString::fromUtf8(content.c_str());

	//Qstring to string
	string str = QString.toUtf8().constData();

view raw QStringVSString.cpp hosted with ❤ by GitHub

///

1/03/2017

In MFC, File exist check and delete the file, example source code.

If file exist then delete the file, example source code in MFC

< github code >

	http://study.marearts.com/2017/01/in-mfc-file-exist-check-and-delete-file.html
	#include "afx.h"
	CFileStatus fs;
	if (CFile::GetStatus(_T("AutoLogIn.CPR"), fs))
	{
	::DeleteFile(_T("AutoLogIn.CPR") );
	}

view raw IfTheFileExistThenDelete.cpp hosted with ❤ by GitHub

___

MFC Encode / Decode example souce code

WtoC function code is here
http://study.marearts.com/2017/01/unicode-cstring-convert-to-char.html

And refer to GetMacAddress code
http://study.marearts.com/2017/01/get-mac-address-in-mfc.html

Encode code
//

	http://study.marearts.com/2017/01/mfc-encode-decode-example-souce-code.html
	bool CEPenService_PenCommunicatorDlg::Encode(CString id, CString pass, CString mac)
	{
	//char *bBuff;
	CString csFile;
	FILE *pFile;

	char bBuff[100];
	char * cid = WtoC(id);
	char * cpass = WtoC(pass);
	char * cmac = WtoC(mac);
	sprintf_s(bBuff, "%s+%s+%s+", cid, cpass, cmac);
	DWORD dwFileLen = sizeof(bBuff);
	delete cid;
	delete cpass;
	delete cmac;

	HCRYPTPROV hProv;
	HCRYPTHASH hHash;
	HCRYPTKEY hKey;
	char csPass[100] = "rlawjdgus";

	// CSP(Crystographic Service Provider) 핸들 얻기
	if (!CryptAcquireContext(&hProv, NULL, MS_ENHANCED_PROV, PROV_RSA_FULL, 0))
	{
	if (!CryptAcquireContext(&hProv, NULL, MS_ENHANCED_PROV, PROV_RSA_FULL, CRYPT_NEWKEYSET))
	{
	//printf("encode fail");
	return false;
	}
	}

	// 해쉬 만들기
	CryptCreateHash(hProv, CALG_SHA, 0, 0, &hHash);
	// 해쉬 값 계산
	CryptHashData(hHash, (BYTE*)csPass, sizeof(csPass), 0);
	// 키 만들기\tab
	CryptDeriveKey(hProv, CALG_RC4, hHash, 0x0080 * 0x10000, &hKey);
	// 암호화\tab
	CryptEncrypt(hKey, 0, TRUE, 0, (BYTE*)bBuff, &dwFileLen, dwFileLen);
	// 해쉬 없애기
	CryptDestroyHash(hHash);
	// CSP 핸들 풀어주기
	CryptReleaseContext(hProv, 0);


	FILE* fp;
	// 암호화된 파일 저장하기
	fopen_s(&fp, "AutoLogIn.CPR", "wb");
	fwrite(bBuff, 1, dwFileLen, fp);
	fclose(fp);

	return true;
	}

view raw MFC_Encode.cpp hosted with ❤ by GitHub

..

Decode code
//

	http://study.marearts.com/2017/01/mfc-encode-decode-example-souce-code.html
	bool Decode()
	{

	BYTE *bBuff;
	DWORD dwFileLen;
	CString csFile;
	FILE *pFile;

	// 암호화된 파일 저장하기
	fopen_s(&pFile, "AutoLogIn.CPR", "rb");
	//pFile = fopen(csFile, "rb");
	if (!pFile)
	{
	::AfxMessageBox(_T("error"));
	return false;
	}

	dwFileLen = _filelength(_fileno(pFile));
	bBuff = new BYTE[dwFileLen];

	// 파일 읽어서 버퍼에 저장
	fread(bBuff, 1, dwFileLen, pFile);
	fclose(pFile);

	HCRYPTPROV hProv;
	HCRYPTHASH hHash;
	HCRYPTKEY hKey;
	//CString csPass=_T("rlawjdgus");
	char csPass[100] = "rlawjdgus"; //encription key

	//m_Pass.GetWindowText(csPass);

	// CSP(Crystographic Service Provider) 핸들 얻기
	if (!CryptAcquireContext(&hProv, NULL, MS_ENHANCED_PROV, PROV_RSA_FULL, 0))
	{
	if (!CryptAcquireContext(&hProv, NULL, MS_ENHANCED_PROV, PROV_RSA_FULL, CRYPT_NEWKEYSET))
	{
	::AfxMessageBox(_T("ecode fail"));
	return false;
	}
	}

	// 해쉬 만들기
	CryptCreateHash(hProv, CALG_SHA, 0, 0, &hHash);
	// 해쉬 값 계산
	CryptHashData(hHash, (BYTE*)csPass, sizeof(csPass), 0);
	// 키 만들기\tab
	CryptDeriveKey(hProv, CALG_RC4, hHash, 0x0080 * 0x10000, &hKey);
	// 복호화
	CryptDecrypt(hKey, 0, TRUE, 0, bBuff, &dwFileLen);
	// 해쉬 없애기
	CryptDestroyHash(hHash);
	// CSP 핸들 풀어주기
	CryptReleaseContext(hProv, 0);

	CString str;
	str.Format(_T("%s"), CString(bBuff));
	::AfxMessageBox(str);

	return true;
	}

view raw MFC_Decode.cpp hosted with ❤ by GitHub

Unicode CString convert to char *

The returned char * will need to be freed after use.

< gist code start >

	http://study.marearts.com/2017/01/unicode-cstring-convert-to-char.html
	char * WtoC(CString str)
	{
	//CString str; //형변환할 문자열이 저장된 CString 변수
	wchar_t* wchar_str; //첫번째 단계(CString to wchar_t*)를 위한 변수
	char* char_str; //char* 형의 변수
	int char_str_len; //char* 형 변수의 길이를 위한 변수

	//1. CString to wchar_t* conversion
	wchar_str = str.GetBuffer(str.GetLength());

	//2. wchar_t* to char* conversion
	//char* 형에 대한길이를 구함
	char_str_len = WideCharToMultiByte(CP_ACP, 0, wchar_str, -1, NULL, 0, NULL, NULL);
	char_str = new char[char_str_len]; //메모리 할당
	//wchar_t* to char* conversion
	WideCharToMultiByte(CP_ACP, 0, wchar_str, -1, char_str, char_str_len, 0, 0);

	//Done.
	return char_str;
	}

view raw UnicodeCStringToChar.cpp hosted with ❤ by GitHub

< gist code end >

#tags
wchar_t, WtoC, WideCharToMultiByte, WideCharToMultiByte

useful site for CString converting

http://www.flounder.com/cstring.htm#Converting%20a%20CString%20to%20an%20integer

Get Mac Address in MFC

GetMacAddress in MFC

Get by using GetAdaptersInfo function
//

	http://study.marearts.com/2017/01/get-mac-address-in-mfc.html
	CString GetMACAddress()
	{
	CString strGateWay = _T("");
	CString strMACAddress = _T("");
	IP_ADAPTER_INFO ipAdapterInfo[5];
	DWORD dwBuflen = sizeof(ipAdapterInfo);

	DWORD dwStatus = GetAdaptersInfo(ipAdapterInfo, &dwBuflen);
	if (dwStatus != ERROR_SUCCESS)
	{
	strMACAddress.Format(_T("Error for GetAdaptersInfo : %d"), dwStatus);
	AfxMessageBox(strMACAddress);
	return _T("");
	}
	PIP_ADAPTER_INFO pIpAdapterInfo = ipAdapterInfo;
	do{
	strGateWay = (CString)pIpAdapterInfo->GatewayList.IpAddress.String;
	if (strGateWay[0] == '0')
	{
	pIpAdapterInfo = pIpAdapterInfo->Next;
	}
	else
	{
	strMACAddress.Format(_T("%02X-%02X-%02X-%02X-%02X-%02X"),
	pIpAdapterInfo->Address[0],
	pIpAdapterInfo->Address[1],
	pIpAdapterInfo->Address[2],
	pIpAdapterInfo->Address[3],
	pIpAdapterInfo->Address[4],
	pIpAdapterInfo->Address[5]
	);

	break;
	}
	} while (pIpAdapterInfo);

	return strMACAddress;
	}

view raw GetMacAddress.cpp hosted with ❤ by GitHub

..
Get by using ip address
//If localhost -> GetMacAddress(_T("*"));
//if have ip -> GetMacAddress(_T("192.168.1.1"));//

	http://study.marearts.com/2017/01/get-mac-address-in-mfc.html
	CString GetMacAddressbyIP(CString strIP)
	{
	NCB Ncb;
	UCHAR uRetCode;
	LANA_ENUM lenum;
	int i;
	CString strOutput = _T("");
	CString string;
	ADAPTER_STATUS Adapter;
	memset(&Ncb, 0, sizeof(Ncb));
	Ncb.ncb_command = NCBENUM;
	Ncb.ncb_buffer = (UCHAR *)&lenum;
	Ncb.ncb_length = sizeof(lenum);
	uRetCode = Netbios(&Ncb);
	for (i = 0; i < lenum.length; i++)
	{
	memset(&Ncb, 0, sizeof(Ncb));
	Ncb.ncb_command = NCBRESET;
	Ncb.ncb_lana_num = lenum.lana[i];
	uRetCode = Netbios(&Ncb);

	memset(&Ncb, 0, sizeof(Ncb));
	Ncb.ncb_command = NCBASTAT;
	Ncb.ncb_lana_num = lenum.lana[i];
	strcpy_s((char*)Ncb.ncb_callname, sizeof(Ncb.ncb_callname), (LPSTR)(LPCTSTR)strIP.GetBuffer(0));
	Ncb.ncb_buffer = (unsigned char *)&Adapter;
	Ncb.ncb_length = sizeof(Adapter);
	uRetCode = Netbios(&Ncb);
	if (uRetCode == 0)
	{
	string.Format(_T("%02X:%02X:%02X:%02X:%02X:%02X"),
	Adapter.adapter_address[0],
	Adapter.adapter_address[1],
	Adapter.adapter_address[2],
	Adapter.adapter_address[3],
	Adapter.adapter_address[4],
	Adapter.adapter_address[5]);
	strOutput += string;
	}
	}

	return strOutput;
	}

view raw GetMacAddressByIP.cpp hosted with ❤ by GitHub

1/02/2017

CString to string

string CstringToString(CString str)
{
    CT2CA pszConvertedAnsiString(str);
    std::string s(pszConvertedAnsiString);

    return s;
}

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