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Created a Plot module that allows you to easily plot data from a Mat.
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nunombmoutinho@gmail.com
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modules/plot/include/opencv2/plot.hpp
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modules/plot/include/opencv2/plot.hpp
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/*M///////////////////////////////////////////////////////////////////////////////////////
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//
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// IMPORTANT: READ BEFORE DOWNLOADING, COPYING, INSTALLING OR USING.
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// License Agreement
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// For Open Source Computer Vision Library
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// Copyright (C) 2000-2008, Intel Corporation, all rights reserved.
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// Copyright (C) 2009-2012, Willow Garage Inc., all rights reserved.
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//M*/
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//################################################################################
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//
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// Created by Nuno Moutinho
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//
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//################################################################################
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#ifndef _OPENCV_PLOT_H_
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#define _OPENCV_PLOT_H_
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#ifdef __cplusplus
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#include <opencv2/core.hpp>
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#include <opencv2/highgui.hpp>
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#include <opencv2/imgproc.hpp>
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#include <vector>
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#include <iostream>
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#include <stdio.h>
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///This plot class allows you to easily plot data from a Mat or a vector. You can plot 1D or 2D plots, change the window size and the axis limits. It's simple yet very effective and usefull.
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namespace cv
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{
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class CV_EXPORTS Plot
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{
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protected:
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cv::Mat plotDataX;
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cv::Mat plotDataY;
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cv::Mat plotDataX_plusZero;
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cv::Mat plotDataY_plusZero;
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const char * plotName;
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///dimensions and limits of the plot
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int plotSizeWidth;
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int plotSizeHeight;
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double plotMinX;
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double plotMaxX;
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double plotMinY;
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double plotMaxY;
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double plotMinX_plusZero;
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double plotMaxX_plusZero;
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double plotMinY_plusZero;
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double plotMaxY_plusZero;
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int plotLineWidth;
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///colors of each plot element
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cv::Scalar plotLineColor;
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cv::Scalar plotBackgroundColor;
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cv::Scalar plotAxisColor;
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cv::Scalar plotGridColor;
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cv::Scalar plotTextColor;
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///the final plot result
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cv::Mat plotResult;
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public:
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///constructor accepting only Y data to be plotted
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Plot(cv::Mat _plotData)
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{
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//if the matrix is not Nx1 or 1xN
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if(_plotData.cols > 1 && _plotData.rows > 1)
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{
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std::cout << "ERROR: Plot data must be a 1xN or Nx1 matrix." << std::endl;
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exit(0);
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}
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//if the matrix type is not CV_64F
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if(_plotData.type() != CV_64F)
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{
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std::cout << "ERROR: Plot data type must be double (CV_64F)." << std::endl;
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exit(0);
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}
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//in case we have a row matrix than needs to be transposed
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if(_plotData.cols > _plotData.rows)
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{
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_plotData = _plotData.t();
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}
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plotDataY=_plotData;
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plotDataX = plotDataY*0;
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for (int i=0; i<plotDataY.rows; i++)
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{
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plotDataX.at<double>(i,0) = i;
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}
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///calling the main constructor
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plotHelper(plotDataX, plotDataY);
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}
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///constructor accepting X data and Y data to be plotted
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Plot(cv::Mat _plotDataX, cv::Mat _plotDataY)
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{
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//f the matrix is not Nx1 or 1xN
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if(_plotDataX.cols > 1 && _plotDataX.rows > 1 || _plotDataY.cols > 1 && _plotDataY.rows > 1)
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{
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std::cout << "ERROR: Plot data must be a 1xN or Nx1 matrix." << std::endl;
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exit(0);
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}
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//if the matrix type is not CV_64F
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if(_plotDataX.type() != CV_64F || _plotDataY.type() != CV_64F)
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{
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std::cout << "ERROR: Plot data type must be double (CV_64F)." << std::endl;
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exit(0);
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}
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//in case we have a row matrix than needs to be transposed
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if(_plotDataX.cols > _plotDataX.rows)
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{
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_plotDataX = _plotDataX.t();
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}
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if(_plotDataY.cols > _plotDataY.rows)
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{
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_plotDataY = _plotDataY.t();
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}
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plotHelper(_plotDataX, _plotDataY);
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}
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///set functions
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void setMinX(double _plotMinX)
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{
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plotMinX = _plotMinX;
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plotMinX_plusZero = _plotMinX;
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}
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void setMaxX(double _plotMaxX)
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{
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plotMaxX = _plotMaxX;
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plotMaxX_plusZero = _plotMaxX;
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}
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void setMinY(double _plotMinY)
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{
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plotMinY = _plotMinY;
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plotMinY_plusZero = _plotMinY;
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}
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void setMaxY(double _plotMaxY)
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{
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plotMaxY = _plotMaxY;
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plotMaxY_plusZero = _plotMaxY;
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}
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void setPlotLineWidth(int _plotLineWidth)
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{
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plotLineWidth=_plotLineWidth;
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}
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void setPlotLineColor(cv::Scalar _plotLineColor)
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{
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plotLineColor=_plotLineColor;
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}
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void setPlotBackgroundColor(cv::Scalar _plotBackgroundColor)
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{
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plotBackgroundColor=_plotBackgroundColor;
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}
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void setPlotAxisColor(cv::Scalar _plotAxisColor)
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{
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plotAxisColor=_plotAxisColor;
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}
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void setPlotGridColor(cv::Scalar _plotGridColor)
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{
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plotGridColor=_plotGridColor;
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}
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void setPlotTextColor(cv::Scalar _plotTextColor)
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{
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plotTextColor=_plotTextColor;
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}
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void setPlotSize(int _plotSizeWidth, int _plotSizeHeight)
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{
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if(_plotSizeWidth > 400)
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plotSizeWidth = _plotSizeWidth;
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else
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plotSizeWidth = 400;
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if(_plotSizeHeight > 300)
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plotSizeHeight = _plotSizeHeight;
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else
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plotSizeHeight = 300;
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}
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///render the plotResult to a Mat
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void render(cv::Mat &_plotResult);
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///show the plotResult from within the class
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void show(const char * _plotName);
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///save the plotResult as a .png image
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void save(const char * _plotFileName);
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protected:
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///a helper method to be used in the constructor
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void plotHelper(cv::Mat _plotDataX, cv::Mat _plotDataY)
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{
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plotDataX=_plotDataX;
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plotDataY=_plotDataY;
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int NumVecElements = plotDataX.rows;
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plotDataX_plusZero = cv::Mat::zeros(NumVecElements+1,1,CV_64F);
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plotDataY_plusZero = cv::Mat::zeros(NumVecElements+1,1,CV_64F);
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for(int i=0; i<NumVecElements; i++){
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plotDataX_plusZero.at<double>(i,0) = plotDataX.at<double>(i,0);
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plotDataY_plusZero.at<double>(i,0) = plotDataY.at<double>(i,0);
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}
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double MinX;
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double MaxX;
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double MinY;
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double MaxY;
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double MinX_plusZero;
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double MaxX_plusZero;
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double MinY_plusZero;
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double MaxY_plusZero;
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///Obtain the minimum and maximum values of Xdata
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minMaxLoc(plotDataX,&MinX,&MaxX);
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///Obtain the minimum and maximum values of Ydata
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minMaxLoc(plotDataY,&MinY,&MaxY);
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///Obtain the minimum and maximum values of Xdata plus zero
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minMaxLoc(plotDataX_plusZero,&MinX_plusZero,&MaxX_plusZero);
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///Obtain the minimum and maximum values of Ydata plus zero
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minMaxLoc(plotDataY_plusZero,&MinY_plusZero,&MaxY_plusZero);
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///setting the min and max values for each axis
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plotMinX = MinX;
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plotMaxX = MaxX;
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plotMinY = MinY;
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plotMaxY = MaxY;
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plotMinX_plusZero = MinX_plusZero;
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plotMaxX_plusZero = MaxX_plusZero;
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plotMinY_plusZero = MinY_plusZero;
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plotMaxY_plusZero = MaxY_plusZero;
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///setting the default size of a plot figure
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setPlotSize(600, 400);
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///setting the default plot line size
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setPlotLineWidth(1);
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///setting default colors for the different elements of the plot
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setPlotAxisColor(cv::Scalar(0, 0, 255));
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setPlotGridColor(cv::Scalar(255, 255, 255));
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setPlotBackgroundColor(cv::Scalar(0, 0, 0));
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setPlotLineColor(cv::Scalar(0, 255, 255));
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setPlotTextColor(cv::Scalar(255, 255, 255));
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}
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cv::Mat linearInterpolation(double Xa, double Xb, double Ya, double Yb, cv::Mat Xdata);
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void drawAxis(int ImageXzero, int ImageYzero, double CurrentX, double CurrentY, cv::Scalar axisColor, cv::Scalar gridColor);
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void drawValuesAsText(double Value, int Xloc, int Yloc, int XMargin, int YMargin);
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void drawValuesAsText(const char * Text, double Value, int Xloc, int Yloc, int XMargin, int YMargin);
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void drawLine(int Xstart, int Xend, int Ystart, int Yend, cv::Scalar lineColor);
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};
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}
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#endif
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#endif
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