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C++ Mat_::ptr方法代码示例

本文整理汇总了C++中Mat_::ptr方法的典型用法代码示例。如果您正苦于以下问题：C++ Mat_::ptr方法的具体用法？C++ Mat_::ptr怎么用？C++ Mat_::ptr使用的例子？那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类Mat_的用法示例。


在下文中一共展示了Mat_::ptr方法的4个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C++代码示例。

示例1: getPerspectiveTransform

/* Calculates coefficients of perspective transformation
* which maps (xi,yi) to (ui,vi), (i=1,2,3,4):
*
*      c00*xi + c01*yi + c02
* ui = ---------------------
*      c20*xi + c21*yi + c22
*
*      c10*xi + c11*yi + c12
* vi = ---------------------
*      c20*xi + c21*yi + c22
*
* Coefficients are calculated by solving linear system:
* / x0 y0  1  0  0  0 -x0*u0 -y0*u0 \ /c00\ /u0\
* | x1 y1  1  0  0  0 -x1*u1 -y1*u1 | |c01| |u1|
* | x2 y2  1  0  0  0 -x2*u2 -y2*u2 | |c02| |u2|
* | x3 y3  1  0  0  0 -x3*u3 -y3*u3 |.|c10|=|u3|,
* |  0  0  0 x0 y0  1 -x0*v0 -y0*v0 | |c11| |v0|
* |  0  0  0 x1 y1  1 -x1*v1 -y1*v1 | |c12| |v1|
* |  0  0  0 x2 y2  1 -x2*v2 -y2*v2 | |c20| |v2|
* \  0  0  0 x3 y3  1 -x3*v3 -y3*v3 / \c21/ \v3/
*
* where:
*   cij - matrix coefficients, c22 = 1
*/
int getPerspectiveTransform(const Point2f src1[], const Point2f src2[], Mat_<double, 1>& dst)
{
	FBC_Assert(dst.rows == 3 && dst.cols == 3);

	Mat_<double, 1> X(8, 1, dst.data);
	double a[8][8], b[8];
	Mat_<double, 1> A(8, 8, a), B(8, 1, b);

	for (int i = 0; i < 4; ++i) {
		a[i][0] = a[i + 4][3] = src1[i].x;
		a[i][1] = a[i + 4][4] = src1[i].y;
		a[i][2] = a[i + 4][5] = 1;
		a[i][3] = a[i][4] = a[i][5] = a[i + 4][0] = a[i + 4][1] = a[i + 4][2] = 0;
		a[i][6] = -src1[i].x*src2[i].x;
		a[i][7] = -src1[i].y*src2[i].x;
		a[i + 4][6] = -src1[i].x*src2[i].y;
		a[i + 4][7] = -src1[i].y*src2[i].y;
		b[i] = src2[i].x;
		b[i + 4] = src2[i].y;
	}

	solve(A, B, X, DECOMP_SVD);
	double* p = (double*)dst.ptr();
	p[8] = 1.;

	return 0;
}
开发者ID:fengbingchun，项目名称:OpenCV_Test，代码行数:51，代码来源:imgwarp.cpp

示例2: copyMakeBorder

int copyMakeBorder(/*const*/ Mat_<_Tp, chs>& src, Mat_<_Tp, chs>& dst, int top, int bottom, int left, int right, int borderType, const Scalar& value = Scalar())
{
	FBC_Assert(top >= 0 && bottom >= 0 && left >= 0 && right >= 0);

	if (src.isSubmatrix() && (borderType & BORDER_ISOLATED) == 0) {
		Size wholeSize;
		Point ofs;
		src.locateROI(wholeSize, ofs);
		int dtop = std::min(ofs.y, top);
		int dbottom = std::min(wholeSize.height - src.rows - ofs.y, bottom);
		int dleft = std::min(ofs.x, left);
		int dright = std::min(wholeSize.width - src.cols - ofs.x, right);
		src.adjustROI(dtop, dbottom, dleft, dright);
		top -= dtop;
		left -= dleft;
		bottom -= dbottom;
		right -= dright;
	}

	if (dst.empty() || dst.rows != (src.rows + top + bottom) || dst.cols != (src.cols + left + right)) {
		dst.release();
		dst = Mat_<_Tp, chs>(src.rows + top + bottom, src.cols + left + right);
	}

	if (top == 0 && left == 0 && bottom == 0 && right == 0) {
		if (src.data != dst.data || src.step != dst.step)
			src.copyTo(dst);
		return 0;
	}

	borderType &= ~BORDER_ISOLATED;

	if (borderType != BORDER_CONSTANT) {
		copyMakeBorder_8u(src.ptr(), src.step, src.size(), dst.ptr(), dst.step, dst.size(), top, left, src.elemSize(), borderType);
	} else {
		int cn = src.channels, cn1 = cn;
		AutoBuffer<double> buf(cn);

		scalarToRawData<_Tp, chs>(value, buf, cn);
		copyMakeConstBorder_8u(src.ptr(), src.step, src.size(), dst.ptr(), dst.step, dst.size(), top, left, (int)src.elemSize(), (uchar*)(double*)buf);
	}

	return 0;
}
开发者ID:fengbingchun，项目名称:OpenCV_Test，代码行数:44，代码来源:imgproc.hpp

示例3: getLocalDataCostPerlabel

void spm_bp::getLocalDataCostPerlabel(int sp, const Vec2f& fl, Mat_<float>& localDataCost)
{
    //USE_COLOR_FEATURES
    cv::Mat_<cv::Vec3f> subLt = subImage1[sp];
#if USE_CENSUS
    vector<vector<bitset<CENSUS_SIZE_OF> > > subLt_css = subCensusBS1[sp];
#endif

    int upHeight, upWidth;
    upHeight = im1Up.rows;
    upWidth = im1Up.cols;

    // extract sub-image from subrange
    int p1 = repPixels1[sp];
    int w = subRange1[p1][2] - subRange1[p1][0] + 1;
    int h = subRange1[p1][3] - subRange1[p1][1] + 1;
    int x = subRange1[p1][0];
    int y = subRange1[p1][1];

    // localDataCost.release();
    localDataCost.create(h, w);
    //Mat_<float> rawCost(h, w);
    Mat_<Vec3f> subRt(h, w);
    vector<vector<bitset<CENSUS_SIZE_OF> > > subRt_css(h, vector<bitset<CENSUS_SIZE_OF> >(w));
#if SAVE_DCOST
    if (check_id >= 0) {
        cout << "hit" << endl;
    }
#endif

    Vec3f* subLtPtr = (cv::Vec3f*)(subLt.ptr(0));
    Vec3f* subRtPtr = (cv::Vec3f*)(subRt.ptr(0));
    float* rawCostPtr = (float*)(localDataCost.ptr(0));

    cv::Vec3f *im2UpPtr = (cv::Vec3f*) im2Up.ptr(0);
    int im2UpWidth = im2Up.cols;
    int maxHeight = upHeight - 1;
    int maxWidth = upWidth - 1;

    int cy, cx, oy, ox;
    float fl0 = fl[0], fl1 = fl[1];
#pragma omp parallel for
    for (cy = 0; cy < h; ++cy) {
        oy = y + cy;
        int oyUp = (oy + fl0) * upScale;
        if (oyUp < 0)
            oyUp = 0;
        if (oyUp >= upHeight)
            oyUp = maxHeight;

        for (cx = 0; cx < w; ++cx) {
            ox = x + cx;
            int oxUp = (ox + fl1) * upScale;
            if (oxUp < 0)
                oxUp = 0;
            if (oxUp >= upWidth)
                oxUp = maxWidth;

#if USE_POINTER_WISE
            // *subRtPtr++ = im2Up[oyUp][oxUp];
            subRtPtr[cy * w + cx] = im2UpPtr[oyUp * im2UpWidth + oxUp];
#else
            subRt[cy][cx] = im2Up[oyUp][oxUp];
#endif

#if USE_CENSUS
            subRt_css[cy][cx] = censusBS2[oyUp][oxUp];
#endif
        }

    }

    // calculate raw cost
    subLtPtr = (cv::Vec3f*)(subLt.ptr(0));
    subRtPtr = (cv::Vec3f*)(subRt.ptr(0));
    rawCostPtr = (float*)(localDataCost.ptr(0));

    int iy, ix;
    for (iy = 0; iy < h; ++iy) {
        for (ix = 0; ix < w; ++ix) {

#if DATA_COST_ADCENSUS
            bitset<CENSUS_SIZE_OF> tmpBS = subRt_css[iy][ix] ^ subLt_css[iy][ix];

#if USE_POINTER_WISE

            float dist_c = fabsf((*subLtPtr)[0] - (*subRtPtr)[0])
                         + fabsf((*subLtPtr)[1] - (*subRtPtr)[1])
                         + fabsf((*subLtPtr)[2] - (*subRtPtr)[2]);
            ++subLtPtr;
            ++subRtPtr;
#else
            float dist_c = std::abs(subLt[iy][ix][0] - subRt[iy][ix][0])
                + std::abs(subLt[iy][ix][1] - subRt[iy][ix][1])
                + std::abs(subLt[iy][ix][2] - subRt[iy][ix][2]);
#endif

            float dist_css = expCensusDiffTable[tmpBS.count()];
            float dist_ce = expColorDiffTable[int(dist_c / 3)];

//.........这里部分代码省略.........
开发者ID:IanDaisy，项目名称:spm-bp，代码行数:101，代码来源:spmbp.cpp

示例4: invert

bool invert(const Mat_<_Tp, chs>&src, Mat_<_Tp, chs>& dst, int method = DECOMP_LU)
{
	FBC_Assert(src.data != NULL && dst.data != NULL);
	FBC_Assert(src.cols > 0 && src.rows > 0 && dst.cols > 0 && dst.rows > 0);
	FBC_Assert(typeid(double).name() == typeid(_Tp).name() || typeid(float).name() == typeid(_Tp).name());
	FBC_Assert(src.cols == dst.rows && src.rows == dst.cols);

	bool result = false;
	size_t esz = sizeof(_Tp) * chs; // size_t esz = CV_ELEM_SIZE(type);
	int m = src.rows, n = src.cols;

	if (method == DECOMP_SVD) { // TODO
		FBC_Assert(0);
	}

	FBC_Assert(m == n);

	if (method == DECOMP_EIG) { // TODO
		FBC_Assert(0);
	}

	FBC_Assert(method == DECOMP_LU || method == DECOMP_CHOLESKY);

	if (n <= 3) {
		const uchar* srcdata = src.ptr();
		uchar* dstdata = const_cast<uchar*>(dst.ptr());
		size_t srcstep = src.step;
		size_t dststep = dst.step;

		if (n == 2) { // TODO
			FBC_Assert(0);
		} else if (n == 3) {
			if (typeid(float).name() == typeid(_Tp).name() && chs == 1) {
				double d = det3(Sf);

				if (d != 0.) {
					double t[12];

					result = true;
					d = 1./d;
					t[0] = (((double)Sf(1,1) * Sf(2,2) - (double)Sf(1,2) * Sf(2,1)) * d);
					t[1] = (((double)Sf(0,2) * Sf(2,1) - (double)Sf(0,1) * Sf(2,2)) * d);
					t[2] = (((double)Sf(0,1) * Sf(1,2) - (double)Sf(0,2) * Sf(1,1)) * d);

					t[3] = (((double)Sf(1,2) * Sf(2,0) - (double)Sf(1,0) * Sf(2,2)) * d);
					t[4] = (((double)Sf(0,0) * Sf(2,2) - (double)Sf(0,2) * Sf(2,0)) * d);
					t[5] = (((double)Sf(0,2) * Sf(1,0) - (double)Sf(0,0) * Sf(1,2)) * d);

					t[6] = (((double)Sf(1,0) * Sf(2,1) - (double)Sf(1,1) * Sf(2,0)) * d);
					t[7] = (((double)Sf(0,1) * Sf(2,0) - (double)Sf(0,0) * Sf(2,1)) * d);
					t[8] = (((double)Sf(0,0) * Sf(1,1) - (double)Sf(0,1) * Sf(1,0)) * d);

					Df(0,0) = (float)t[0]; Df(0,1) = (float)t[1]; Df(0,2) = (float)t[2];
					Df(1,0) = (float)t[3]; Df(1,1) = (float)t[4]; Df(1,2) = (float)t[5];
					Df(2, 0) = (float)t[6]; Df(2, 1) = (float)t[7]; Df(2, 2) = (float)t[8];
				}
			} else {
				double d = det3(Sd);
				if (d != 0.) {
					result = true;
					d = 1. / d;
					double t[9];

					t[0] = (Sd(1, 1) * Sd(2, 2) - Sd(1, 2) * Sd(2, 1)) * d;
					t[1] = (Sd(0, 2) * Sd(2, 1) - Sd(0, 1) * Sd(2, 2)) * d;
					t[2] = (Sd(0, 1) * Sd(1, 2) - Sd(0, 2) * Sd(1, 1)) * d;

					t[3] = (Sd(1, 2) * Sd(2, 0) - Sd(1, 0) * Sd(2, 2)) * d;
					t[4] = (Sd(0, 0) * Sd(2, 2) - Sd(0, 2) * Sd(2, 0)) * d;
					t[5] = (Sd(0, 2) * Sd(1, 0) - Sd(0, 0) * Sd(1, 2)) * d;

					t[6] = (Sd(1, 0) * Sd(2, 1) - Sd(1, 1) * Sd(2, 0)) * d;
					t[7] = (Sd(0, 1) * Sd(2, 0) - Sd(0, 0) * Sd(2, 1)) * d;
					t[8] = (Sd(0, 0) * Sd(1, 1) - Sd(0, 1) * Sd(1, 0)) * d;

					Dd(0, 0) = t[0]; Dd(0, 1) = t[1]; Dd(0, 2) = t[2];
					Dd(1, 0) = t[3]; Dd(1, 1) = t[4]; Dd(1, 2) = t[5];
					Dd(2, 0) = t[6]; Dd(2, 1) = t[7]; Dd(2, 2) = t[8];
				}
			}
		} else {
			assert(n == 1);

			if (typeid(float).name() == typeid(_Tp).name() && chs == 1)
			{
				double d = Sf(0, 0);
				if (d != 0.) {
					result = true;
					Df(0, 0) = (float)(1. / d);
				}
			} else {
				double d = Sd(0, 0);
				if (d != 0.) {
					result = true;
					Dd(0, 0) = 1. / d;
				}
			}
		}

		if (!result)
//.........这里部分代码省略.........
开发者ID:fengbingchun，项目名称:OpenCV_Test，代码行数:101，代码来源:invert.hpp


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