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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 10 years ago
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  1. 2
      modules/plot/CMakeLists.txt
  2. 6
      modules/plot/README.md
  3. 1069
      modules/plot/doc/images/sin_x.png
  4. 1090
      modules/plot/doc/images/x_2.png
  5. 4
      modules/plot/doc/plot.markdown
  6. 300
      modules/plot/include/opencv2/plot.hpp
  7. 53
      modules/plot/include/opencv2/plot/plot.hpp
  8. 209
      modules/plot/src/plot.cpp
  9. 50
      modules/plot/src/precomp.cpp
  10. 62
      modules/plot/src/precomp.hpp

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modules/plot/CMakeLists.txt
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set(the_description "Plot function for Mat/std::vector data.")
ocv_define_module(plot opencv_core opencv_highgui)

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modules/plot/README.md
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Plot Module Overview
====================
Created by Nuno Moutinho
This Plot module allows you to easily plot data in 1D or 2D. You can change the size of the window, the limits of the axis and the colors of each element. You can also show in real time the plot you are building or save the plot as an image (png).

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Plot Module Overview
====================
This Plot module allows you to easily plot data in 1D or 2D. You can change the size of the window, the limits of the axis and the colors of each element. You can also show in real time the plot you are building or save the plot as an image (png).

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modules/plot/include/opencv2/plot.hpp
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/*M///////////////////////////////////////////////////////////////////////////////////////
//
// IMPORTANT: READ BEFORE DOWNLOADING, COPYING, INSTALLING OR USING.
//
// By downloading, copying, installing or using the software you agree to this license.
// If you do not agree to this license, do not download, install,
// copy or use the software.
//
//
// License Agreement
// For Open Source Computer Vision Library
//
// Copyright (C) 2000-2008, Intel Corporation, all rights reserved.
// Copyright (C) 2009-2012, Willow Garage Inc., all rights reserved.
// Third party copyrights are property of their respective owners.
//
// Redistribution and use in source and binary forms, with or without modification,
// are permitted provided that the following conditions are met:
//
// * Redistribution's of source code must retain the above copyright notice,
// this list of conditions and the following disclaimer.
//
// * Redistribution's in binary form must reproduce the above copyright notice,
// this list of conditions and the following disclaimer in the documentation
// and/or other materials provided with the distribution.
//
// * The name of the copyright holders may not be used to endorse or promote products
// derived from this software without specific prior written permission.
//
// This software is provided by the copyright holders and contributors "as is" and
// any express or implied warranties, including, but not limited to, the implied
// warranties of merchantability and fitness for a particular purpose are disclaimed.
// In no event shall the Intel Corporation or contributors be liable for any direct,
// indirect, incidental, special, exemplary, or consequential damages
// (including, but not limited to, procurement of substitute goods or services;
// loss of use, data, or profits; or business interruption) however caused
// and on any theory of liability, whether in contract, strict liability,
// or tort (including negligence or otherwise) arising in any way out of
// the use of this software, even if advised of the possibility of such damage.
//
//M*/
//################################################################################
//
// Created by Nuno Moutinho
//
//################################################################################
#ifndef _OPENCV_PLOT_H_
#define _OPENCV_PLOT_H_
#ifdef __cplusplus
#include <opencv2/core.hpp>
#include <opencv2/highgui.hpp>
#include <opencv2/imgproc.hpp>
#include <vector>
#include <iostream>
#include <stdio.h>
///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.
namespace cv
{
class CV_EXPORTS Plot
{
protected:
cv::Mat plotDataX;
cv::Mat plotDataY;
cv::Mat plotDataX_plusZero;
cv::Mat plotDataY_plusZero;
const char * plotName;
///dimensions and limits of the plot
int plotSizeWidth;
int plotSizeHeight;
double plotMinX;
double plotMaxX;
double plotMinY;
double plotMaxY;
double plotMinX_plusZero;
double plotMaxX_plusZero;
double plotMinY_plusZero;
double plotMaxY_plusZero;
int plotLineWidth;
///colors of each plot element
cv::Scalar plotLineColor;
cv::Scalar plotBackgroundColor;
cv::Scalar plotAxisColor;
cv::Scalar plotGridColor;
cv::Scalar plotTextColor;
///the final plot result
cv::Mat plotResult;
public:
///constructor accepting only Y data to be plotted
Plot(cv::Mat _plotData)
{
//if the matrix is not Nx1 or 1xN
if(_plotData.cols > 1 && _plotData.rows > 1)
{
std::cout << "ERROR: Plot data must be a 1xN or Nx1 matrix." << std::endl;
exit(0);
}
//if the matrix type is not CV_64F
if(_plotData.type() != CV_64F)
{
std::cout << "ERROR: Plot data type must be double (CV_64F)." << std::endl;
exit(0);
}
//in case we have a row matrix than needs to be transposed
if(_plotData.cols > _plotData.rows)
{
_plotData = _plotData.t();
}
plotDataY=_plotData;
plotDataX = plotDataY*0;
for (int i=0; i<plotDataY.rows; i++)
{
plotDataX.at<double>(i,0) = i;
}
///calling the main constructor
plotHelper(plotDataX, plotDataY);
}
///constructor accepting X data and Y data to be plotted
Plot(cv::Mat _plotDataX, cv::Mat _plotDataY)
{
//f the matrix is not Nx1 or 1xN
if(_plotDataX.cols > 1 && _plotDataX.rows > 1 || _plotDataY.cols > 1 && _plotDataY.rows > 1)
{
std::cout << "ERROR: Plot data must be a 1xN or Nx1 matrix." << std::endl;
exit(0);
}
//if the matrix type is not CV_64F
if(_plotDataX.type() != CV_64F || _plotDataY.type() != CV_64F)
{
std::cout << "ERROR: Plot data type must be double (CV_64F)." << std::endl;
exit(0);
}
//in case we have a row matrix than needs to be transposed
if(_plotDataX.cols > _plotDataX.rows)
{
_plotDataX = _plotDataX.t();
}
if(_plotDataY.cols > _plotDataY.rows)
{
_plotDataY = _plotDataY.t();
}
plotHelper(_plotDataX, _plotDataY);
}
///set functions
void setMinX(double _plotMinX)
{
plotMinX = _plotMinX;
plotMinX_plusZero = _plotMinX;
}
void setMaxX(double _plotMaxX)
{
plotMaxX = _plotMaxX;
plotMaxX_plusZero = _plotMaxX;
}
void setMinY(double _plotMinY)
{
plotMinY = _plotMinY;
plotMinY_plusZero = _plotMinY;
}
void setMaxY(double _plotMaxY)
{
plotMaxY = _plotMaxY;
plotMaxY_plusZero = _plotMaxY;
}
void setPlotLineWidth(int _plotLineWidth)
{
plotLineWidth=_plotLineWidth;
}
void setPlotLineColor(cv::Scalar _plotLineColor)
{
plotLineColor=_plotLineColor;
}
void setPlotBackgroundColor(cv::Scalar _plotBackgroundColor)
{
plotBackgroundColor=_plotBackgroundColor;
}
void setPlotAxisColor(cv::Scalar _plotAxisColor)
{
plotAxisColor=_plotAxisColor;
}
void setPlotGridColor(cv::Scalar _plotGridColor)
{
plotGridColor=_plotGridColor;
}
void setPlotTextColor(cv::Scalar _plotTextColor)
{
plotTextColor=_plotTextColor;
}
void setPlotSize(int _plotSizeWidth, int _plotSizeHeight)
{
if(_plotSizeWidth > 400)
plotSizeWidth = _plotSizeWidth;
else
plotSizeWidth = 400;
if(_plotSizeHeight > 300)
plotSizeHeight = _plotSizeHeight;
else
plotSizeHeight = 300;
}
///render the plotResult to a Mat
void render(cv::Mat &_plotResult);
///show the plotResult from within the class
void show(const char * _plotName);
///save the plotResult as a .png image
void save(const char * _plotFileName);
protected:
///a helper method to be used in the constructor
void plotHelper(cv::Mat _plotDataX, cv::Mat _plotDataY)
{
plotDataX=_plotDataX;
plotDataY=_plotDataY;
int NumVecElements = plotDataX.rows;
plotDataX_plusZero = cv::Mat::zeros(NumVecElements+1,1,CV_64F);
plotDataY_plusZero = cv::Mat::zeros(NumVecElements+1,1,CV_64F);
for(int i=0; i<NumVecElements; i++){
plotDataX_plusZero.at<double>(i,0) = plotDataX.at<double>(i,0);
plotDataY_plusZero.at<double>(i,0) = plotDataY.at<double>(i,0);
}
double MinX;
double MaxX;
double MinY;
double MaxY;
double MinX_plusZero;
double MaxX_plusZero;
double MinY_plusZero;
double MaxY_plusZero;
///Obtain the minimum and maximum values of Xdata
minMaxLoc(plotDataX,&MinX,&MaxX);
///Obtain the minimum and maximum values of Ydata
minMaxLoc(plotDataY,&MinY,&MaxY);
///Obtain the minimum and maximum values of Xdata plus zero
minMaxLoc(plotDataX_plusZero,&MinX_plusZero,&MaxX_plusZero);
///Obtain the minimum and maximum values of Ydata plus zero
minMaxLoc(plotDataY_plusZero,&MinY_plusZero,&MaxY_plusZero);
///setting the min and max values for each axis
plotMinX = MinX;
plotMaxX = MaxX;
plotMinY = MinY;
plotMaxY = MaxY;
plotMinX_plusZero = MinX_plusZero;
plotMaxX_plusZero = MaxX_plusZero;
plotMinY_plusZero = MinY_plusZero;
plotMaxY_plusZero = MaxY_plusZero;
///setting the default size of a plot figure
setPlotSize(600, 400);
///setting the default plot line size
setPlotLineWidth(1);
///setting default colors for the different elements of the plot
setPlotAxisColor(cv::Scalar(0, 0, 255));
setPlotGridColor(cv::Scalar(255, 255, 255));
setPlotBackgroundColor(cv::Scalar(0, 0, 0));
setPlotLineColor(cv::Scalar(0, 255, 255));
setPlotTextColor(cv::Scalar(255, 255, 255));
}
cv::Mat linearInterpolation(double Xa, double Xb, double Ya, double Yb, cv::Mat Xdata);
void drawAxis(int ImageXzero, int ImageYzero, double CurrentX, double CurrentY, cv::Scalar axisColor, cv::Scalar gridColor);
void drawValuesAsText(double Value, int Xloc, int Yloc, int XMargin, int YMargin);
void drawValuesAsText(const char * Text, double Value, int Xloc, int Yloc, int XMargin, int YMargin);
void drawLine(int Xstart, int Xend, int Ystart, int Yend, cv::Scalar lineColor);
};
}
#endif
#endif

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modules/plot/include/opencv2/plot/plot.hpp
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/*M///////////////////////////////////////////////////////////////////////////////////////
//
// IMPORTANT: READ BEFORE DOWNLOADING, COPYING, INSTALLING OR USING.
//
// By downloading, copying, installing or using the software you agree to this license.
// If you do not agree to this license, do not download, install,
// copy or use the software.
//
//
// License Agreement
// For Open Source Computer Vision Library
//
// Copyright (C) 2000-2008, Intel Corporation, all rights reserved.
// Copyright (C) 2009, Willow Garage Inc., all rights reserved.
// Copyright (C) 2013, OpenCV Foundation, all rights reserved.
// Third party copyrights are property of their respective owners.
//
// Redistribution and use in source and binary forms, with or without modification,
// are permitted provided that the following conditions are met:
//
// * Redistribution's of source code must retain the above copyright notice,
// this list of conditions and the following disclaimer.
//
// * Redistribution's in binary form must reproduce the above copyright notice,
// this list of conditions and the following disclaimer in the documentation
// and/or other materials provided with the distribution.
//
// * The name of the copyright holders may not be used to endorse or promote products
// derived from this software without specific prior written permission.
//
// This software is provided by the copyright holders and contributors "as is" and
// any express or implied warranties, including, but not limited to, the implied
// warranties of merchantability and fitness for a particular purpose are disclaimed.
// In no event shall the Intel Corporation or contributors be liable for any direct,
// indirect, incidental, special, exemplary, or consequential damages
// (including, but not limited to, procurement of substitute goods or services;
// loss of use, data, or profits; or business interruption) however caused
// and on any theory of liability, whether in contract, strict liability,
// or tort (including negligence or otherwise) arising in any way out of
// the use of this software, even if advised of the possibility of such damage.
//
//M*/
//################################################################################
//
// Created by Nuno Moutinho
//
//################################################################################
#ifdef __OPENCV_BUILD
#error this is a compatibility header which should not be used inside the OpenCV library
#endif
#include "opencv2/plot.hpp"

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modules/plot/src/plot.cpp
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/*M///////////////////////////////////////////////////////////////////////////////////////
//
// IMPORTANT: READ BEFORE DOWNLOADING, COPYING, INSTALLING OR USING.
//
// By downloading, copying, installing or using the software you agree to this license.
// If you do not agree to this license, do not download, install,
// copy or use the software.
//
//
// License Agreement
// For Open Source Computer Vision Library
//
// Copyright (C) 2000-2008, Intel Corporation, all rights reserved.
// Copyright (C) 2009, Willow Garage Inc., all rights reserved.
// Third party copyrights are property of their respective owners.
//
// Redistribution and use in source and binary forms, with or without modification,
// are permitted provided that the following conditions are met:
//
// * Redistribution's of source code must retain the above copyright notice,
// this list of conditions and the following disclaimer.
//
// * Redistribution's in binary form must reproduce the above copyright notice,
// this list of conditions and the following disclaimer in the documentation
// and/or other materials provided with the distribution.
//
// * The name of the copyright holders may not be used to endorse or promote products
// derived from this software without specific prior written permission.
//
// This software is provided by the copyright holders and contributors "as is" and
// any express or implied warranties, including, but not limited to, the implied
// warranties of merchantability and fitness for a particular purpose are disclaimed.
// In no event shall the Intel Corporation or contributors be liable for any direct,
// indirect, incidental, special, exemplary, or consequential damages
// (including, but not limited to, procurement of substitute goods or services;
// loss of use, data, or profits; or business interruption) however caused
// and on any theory of liability, whether in contract, strict liability,
// or tort (including negligence or otherwise) arising in any way out of
// the use of this software, even if advised of the possibility of such damage.
//
//M*/
//################################################################################
//
// Created by Nuno Moutinho
//
//################################################################################
#include "precomp.hpp"
using namespace cv;
using namespace std;
///render the plotResult to a Mat
void Plot::render(cv::Mat &_plotResult){
///create the plot result
plotResult = cv::Mat::zeros(plotSizeHeight, plotSizeWidth, CV_8UC3);
int NumVecElements = plotDataX.rows;
Mat InterpXdata = linearInterpolation(plotMinX, plotMaxX, 0, plotSizeWidth, plotDataX);
Mat InterpYdata = linearInterpolation(plotMinY, plotMaxY, 0, plotSizeHeight, plotDataY);
///Find the zeros in image coordinates
Mat InterpXdataFindZero = linearInterpolation(plotMinX_plusZero, plotMaxX_plusZero, 0, plotSizeWidth, plotDataX_plusZero);
Mat InterpYdataFindZero = linearInterpolation(plotMinY_plusZero, plotMaxY_plusZero, 0, plotSizeHeight, plotDataY_plusZero);
int ImageXzero = (int)InterpXdataFindZero.at<double>(NumVecElements,0);
int ImageYzero = (int)InterpYdataFindZero.at<double>(NumVecElements,0);
double CurrentX = plotDataX.at<double>(NumVecElements-1,0);
double CurrentY = plotDataY.at<double>(NumVecElements-1,0);
//Draw the plot by connecting lines between the points
cv::Point p1;
p1.x = (int)InterpXdata.at<double>(0,0);
p1.y = (int)InterpYdata.at<double>(0,0);
drawAxis(ImageXzero,ImageYzero, CurrentX, CurrentY, plotAxisColor, plotGridColor);
for (int r=1; r<InterpXdata.rows; r++){
cv::Point p2;
p2.x = (int)InterpXdata.at<double>(r,0);
p2.y = (int)InterpYdata.at<double>(r,0);
line(plotResult, p1, p2, plotLineColor, plotLineWidth, 8, 0);
p1 = p2;
}
_plotResult = plotResult.clone();
}
///show the plotResult from within the class
void Plot::show(const char * _plotName)
{
namedWindow(_plotName);
imshow(_plotName, plotResult);
waitKey(5);
}
///save the plotResult as a .png image
void Plot::save(const char * _plotFileName)
{
imwrite(_plotFileName, plotResult);
}
void Plot::drawAxis(int ImageXzero, int ImageYzero, double CurrentX, double CurrentY, Scalar axisColor, Scalar gridColor){
drawValuesAsText(0, ImageXzero, ImageYzero, 10, 20);
drawValuesAsText(0, ImageXzero, ImageYzero, -20, 20);
drawValuesAsText(0, ImageXzero, ImageYzero, 10, -10);
drawValuesAsText(0, ImageXzero, ImageYzero, -20, -10);
drawValuesAsText("X = %g",CurrentX, 0, 0, 40, 20);
drawValuesAsText("Y = %g",CurrentY, 0, 20, 40, 20);
//Horizontal X axis and equispaced horizontal lines
int LineSpace = 50;
int TraceSize = 5;
drawLine(0, plotSizeWidth, ImageYzero, ImageYzero, axisColor);
for(int i=-plotSizeHeight; i<plotSizeHeight; i=i+LineSpace){
if(i!=0){
int Trace=0;
while(Trace<plotSizeWidth){
drawLine(Trace, Trace+TraceSize, ImageYzero+i, ImageYzero+i, gridColor);
Trace = Trace+2*TraceSize;
}
}
}
//Vertical Y axis
drawLine(ImageXzero, ImageXzero, 0, plotSizeHeight, axisColor);
for(int i=-plotSizeWidth; i<plotSizeWidth; i=i+LineSpace){
if(i!=0){
int Trace=0;
while(Trace<plotSizeHeight){
drawLine(ImageXzero+i, ImageXzero+i, Trace, Trace+TraceSize, gridColor);
Trace = Trace+2*TraceSize;
}
}
}
}
Mat Plot::linearInterpolation(double Xa, double Xb, double Ya, double Yb, cv::Mat Xdata){
Mat Ydata = Xdata*0;
for (int i=0; i<Xdata.rows; i++){
double X = Xdata.at<double>(i,0);
Ydata.at<double>(i,0) = int(Ya + (Yb-Ya)*(X-Xa)/(Xb-Xa));
if(Ydata.at<double>(i,0)<0)
Ydata.at<double>(i,0)=0;
}
return Ydata;
}
void Plot::drawValuesAsText(double Value, int Xloc, int Yloc, int XMargin, int YMargin){
char AxisX_Min_Text[20];
double TextSize = 1;
sprintf(AxisX_Min_Text, "%g", Value);
cv::Point AxisX_Min_Loc;
AxisX_Min_Loc.x = Xloc+XMargin;
AxisX_Min_Loc.y = Yloc+YMargin;
putText(plotResult,AxisX_Min_Text, AxisX_Min_Loc, FONT_HERSHEY_COMPLEX_SMALL, TextSize, plotTextColor, 1, 8);
}
void Plot::drawValuesAsText(const char *Text, double Value, int Xloc, int Yloc, int XMargin, int YMargin){
char AxisX_Min_Text[20];
int TextSize = 1;
sprintf(AxisX_Min_Text, Text, Value);
cv::Point AxisX_Min_Loc;
AxisX_Min_Loc.x = Xloc+XMargin;
AxisX_Min_Loc.y = Yloc+YMargin;
putText(plotResult,AxisX_Min_Text, AxisX_Min_Loc, FONT_HERSHEY_COMPLEX_SMALL, TextSize, plotTextColor, 1, 8);
}
void Plot::drawLine(int Xstart, int Xend, int Ystart, int Yend, Scalar lineColor){
cv::Point Axis_start;
cv::Point Axis_end;
Axis_start.x = Xstart;
Axis_start.y = Ystart;
Axis_end.x = Xend;
Axis_end.y = Yend;
line(plotResult, Axis_start, Axis_end, lineColor, plotLineWidth, 8, 0);
}

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modules/plot/src/precomp.cpp
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/*M///////////////////////////////////////////////////////////////////////////////////////
//
// IMPORTANT: READ BEFORE DOWNLOADING, COPYING, INSTALLING OR USING.
//
// By downloading, copying, installing or using the software you agree to this license.
// If you do not agree to this license, do not download, install,
// copy or use the software.
//
//
// License Agreement
// For Open Source Computer Vision Library
//
// Copyright (C) 2000-2008, Intel Corporation, all rights reserved.
// Copyright (C) 2009, Willow Garage Inc., all rights reserved.
// Third party copyrights are property of their respective owners.
//
// Redistribution and use in source and binary forms, with or without modification,
// are permitted provided that the following conditions are met:
//
// * Redistribution's of source code must retain the above copyright notice,
// this list of conditions and the following disclaimer.
//
// * Redistribution's in binary form must reproduce the above copyright notice,
// this list of conditions and the following disclaimer in the documentation
// and/or other materials provided with the distribution.
//
// * The name of the copyright holders may not be used to endorse or promote products
// derived from this software without specific prior written permission.
//
// This software is provided by the copyright holders and contributors "as is" and
// any express or implied warranties, including, but not limited to, the implied
// warranties of merchantability and fitness for a particular purpose are disclaimed.
// In no event shall the Intel Corporation or contributors be liable for any direct,
// indirect, incidental, special, exemplary, or consequential damages
// (including, but not limited to, procurement of substitute goods or services;
// loss of use, data, or profits; or business interruption) however caused
// and on any theory of liability, whether in contract, strict liability,
// or tort (including negligence or otherwise) arising in any way out of
// the use of this software, even if advised of the possibility of such damage.
//
//M*/
//################################################################################
//
// Created by Nuno Moutinho
//
//################################################################################
#include "precomp.hpp"
/* End of file. */

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/*M///////////////////////////////////////////////////////////////////////////////////////
//
// IMPORTANT: READ BEFORE DOWNLOADING, COPYING, INSTALLING OR USING.
//
// By downloading, copying, installing or using the software you agree to this license.
// If you do not agree to this license, do not download, install,
// copy or use the software.
//
//
// License Agreement
// For Open Source Computer Vision Library
//
// Copyright (C) 2000-2008, Intel Corporation, all rights reserved.
// Copyright (C) 2009, Willow Garage Inc., all rights reserved.
// Third party copyrights are property of their respective owners.
//
// Redistribution and use in source and binary forms, with or without modification,
// are permitted provided that the following conditions are met:
//
// * Redistribution's of source code must retain the above copyright notice,
// this list of conditions and the following disclaimer.
//
// * Redistribution's in binary form must reproduce the above copyright notice,
// this list of conditions and the following disclaimer in the documentation
// and/or other materials provided with the distribution.
//
// * The name of the copyright holders may not be used to endorse or promote products
// derived from this software without specific prior written permission.
//
// This software is provided by the copyright holders and contributors "as is" and
// any express or implied warranties, including, but not limited to, the implied
// warranties of merchantability and fitness for a particular purpose are disclaimed.
// In no event shall the Intel Corporation or contributors be liable for any direct,
// indirect, incidental, special, exemplary, or consequential damages
// (including, but not limited to, procurement of substitute goods or services;
// loss of use, data, or profits; or business interruption) however caused
// and on any theory of liability, whether in contract, strict liability,
// or tort (including negligence or otherwise) arising in any way out of
// the use of this software, even if advised of the possibility of such damage.
//
//M*/
//################################################################################
//
// Created by Nuno Moutinho
//
//################################################################################
#ifndef __OPENCV_PRECOMP_H__
#define __OPENCV_PRECOMP_H__
#include <opencv2/core.hpp>
#include <opencv2/highgui.hpp>
#include <opencv2/imgproc.hpp>
#include <vector>
#include <iostream>
#include <stdio.h>
#include "opencv2/plot.hpp"
#include "opencv2/opencv_modules.hpp"
#endif
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