OpenCV 绘制十字Mark标

最新推荐文章于 2024-10-24 20:18:16 发布

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最新推荐文章于 2024-10-24 20:18:16 发布 · 2.1k 阅读

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void DrawCross(cv::Mat & mat, cv::Point2i ptCenter, cv::Scalar color, double dFactor)
{
	double dAxisOffset = 12;
	double dAxisLen = 24 * 10 + 12 - dAxisOffset;

	// 坐标轴属性 0=Y+ 1=X+ 2=Y- 3=X-
	double dDirX[] = { 0, 1, 0, -1 };
	double dDirY[] = { -1, 0, 1, 0 };

	// 刻度属性
	int nLabelSize = 9 + 5;
	double dLabelStep[] = { 12, 12, 12, 12, 12, 12, 12, 12, 12, 24, 24, 24, 24, 24 };
	double dLabelHeight[] = { 12, 6, 12, 6, 12, 6, 12, 6, 12, 12, 12, 12, 12, 12 };

	// 字符属性
	int nIdx5 = 8;
	int nIdx10 = 13;
	double nCharOffset = 6;
	double dCharH = 0;
	double dCharW = 0;
	
	for (int i = 0; i < 4; i++)
	{
		cv::Point AxisPtS, AxisPtE;

		// 绘制轴
		AxisPtS.x = ptCenter.x + dAxisOffset / dFactor * dDirX[i];
		AxisPtS.y = ptCenter.y + dAxisOffset / dFactor * dDirY[i];
		AxisPtE.x = AxisPtS.x + dAxisLen / dFactor * dDirX[i];
		AxisPtE.y = AxisPtS.y + dAxisLen / dFactor * dDirY[i];
		cv::line(mat, AxisPtS, AxisPtE, color, 1);

		// 绘制刻度
		double nSumStep = 0;
		for (int j = 0; j <