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// Author: Ce Liu (c) Dec, 2009; celiu@mit.edu
// Modified By: Deepak Pathak (c) 2016; pathak@berkeley.edu
// No need of OpenCV; python wrapper handles it
// #include "cv.h"
// #include "highgui.h"
// #include "opencv2/core/core.hpp"
// #include "opencv2/highgui/highgui.hpp"
;
// template <class T>
// bool ImageIO::loadImage(const char *filename, T *&pImagePlane, int &width, int &height, int &nchannels)
// {
// cv::Mat im = cv::imread(filename);
// if(im.data == NULL) // if allocation fails
// return false;
// if(im.type()!= CV_8UC1 && im.type()!=CV_8UC3 && im.type()!=CV_8UC4) // we only support three types of image information for now
// return false;
// width = im.size().width;
// height = im.size().height;
// nchannels = im.channels();
// pImagePlane = new T[width*height*nchannels];
//
// if(typeid(T) == typeid(unsigned char))
// {
// for(int i = 0;i<height;i++)
// memcpy(pImagePlane+i*im.step,im.data+i*im.step,width*nchannels);
// return true;
// }
//
// // check whether the type is float point
// bool IsFloat=false;
// if(typeid(T)==typeid(double) || typeid(T)==typeid(float) || typeid(T)==typeid(long double))
// IsFloat=true;
//
// for(int i =0;i<height;i++)
// {
// int offset1 = i*width*nchannels;
// int offset2 = i*im.step;
// for(int j=0;j<im.step;j++)
// {
// if(IsFloat)
// pImagePlane[offset1+j] = (T)im.data[offset2+j]/255;
// else
// pImagePlane[offset1+j] = im.data[offset2+j];
// }
// }
// return true;
// }
// template <class T>
// bool ImageIO::saveImage(const char* filename,const T* pImagePlane,int width,int height, int nchannels,ImageType imtype)
// {
// cv::Mat im;
// switch(nchannels){
// case 1:
// im.create(height,width,CV_8UC1);
// break;
// case 3:
// im.create(height,width,CV_8UC3);
// break;
// default:
// return -1;
// }
// // check whether the type is float point
// bool IsFloat=false;
// if(typeid(T)==typeid(double) || typeid(T)==typeid(float) || typeid(T)==typeid(long double))
// IsFloat=true;
//
// T Max,Min;
// int nElements = width*height*nchannels;
// switch(imtype){
// case standard:
// break;
// case derivative:
// // find the max of the absolute value
// Max = pImagePlane[0];
// if(!IsFloat)
// for(int i = 0;i<nElements;i++)
// Max = __max(Max,abs(pImagePlane[i]));
// else
// for(int i=0;i<nElements;i++)
// Max = __max(Max,fabs((double)pImagePlane[i]));
// Max*=2;
// break;
// case normalized:
// Max = Min = pImagePlane[0];
// for(int i = 0;i<nElements;i++)
// {
// Max = __max(Max,pImagePlane[i]);
// Min = __min(Min,pImagePlane[i]);
// }
// break;
// }
// if(typeid(T) == typeid(unsigned char) && imtype == standard)
// {
// for(int i = 0;i<height;i++)
// memcpy(im.data+i*im.step,pImagePlane+i*im.step,width*nchannels);
// }
// else
// {
// for(int i =0;i<height;i++)
// {
// int offset1 = i*width*nchannels;
// int offset2 = i*im.step;
// for(int j=0;j<im.step;j++)
// {
// switch(imtype){
// case standard:
// if(IsFloat)
// im.data[offset2+j] = pImagePlane[offset1+j]*255;
// else
// im.data[offset2+j] = __max(__min(pImagePlane[offset1+j],255),0);
// break;
// case derivative:
//
// if(IsFloat)
// im.data[offset2+j] = (double)(pImagePlane[offset1+j]/Max+0.5)*255;
// else
// im.data[offset2+j] = ((double)pImagePlane[offset1+j]/Max+0.5)*255;
// break;
// case normalized:
// im.data[offset2+j] = (double)(pImagePlane[offset1+j]-Min)/(Max-Min)*255;
// break;
// }
// }
// }
// }
// return cv::imwrite(filename,im);
// }
/*
#include <QVector>
#include <QImage>
#include <QString>
#include "math.h"
//-----------------------------------------------------------------------------------------
// this class is a wrapper to use QImage to load image into image planes
//-----------------------------------------------------------------------------------------
class ImageIO
{
public:
enum ImageType{standard, derivative, normalized};
ImageIO(void);
~ImageIO(void);
public:
template <class T>
static void loadImage(const QImage& image,T*& pImagePlane,int& width,int& height,int& nchannels);
template <class T>
static bool loadImage(const QString& filename,T*& pImagePlane,int& width,int& height,int& nchannels);
template <class T>
static unsigned char convertPixel(const T& value,bool IsFloat,ImageType type,T& _Max,T& _Min);
template <class T>
static bool writeImage(const QString& filename, const T*& pImagePlane,int width,int height,int nchannels,ImageType type=standard,int quality=-1);
template <class T>
static bool writeImage(const QString& filename,const T* pImagePlane,int width,int height,int nchannels,T min, T max,int quality=-1);
};
template <class T>
void ImageIO::loadImage(const QImage& image, T*& pImagePlane,int& width,int& height,int& nchannels)
{
// get the image information
width=image.width();
height=image.height();
nchannels=3;
pImagePlane=new T[width*height*nchannels];
// check whether the type is float point
bool IsFloat=false;
if(typeid(T)==typeid(double) || typeid(T)==typeid(float) || typeid(T)==typeid(long double))
IsFloat=true;
const unsigned char* plinebuffer;
for(int i=0;i<height;i++)
{
plinebuffer=image.scanLine(i);
for(int j=0;j<width;j++)
{
if(IsFloat)
{
pImagePlane[(i*width+j)*3]=(T)plinebuffer[j*4]/255;
pImagePlane[(i*width+j)*3+1]=(T)plinebuffer[j*4+1]/255;
pImagePlane[(i*width+j)*3+2]=(T)plinebuffer[j*4+2]/255;
}
else
{
pImagePlane[(i*width+j)*3]=plinebuffer[j*4];
pImagePlane[(i*width+j)*3+1]=plinebuffer[j*4+1];
pImagePlane[(i*width+j)*3+2]=plinebuffer[j*4+2];
}
}
}
}
template <class T>
bool ImageIO::loadImage(const QString&filename, T*& pImagePlane,int& width,int& height,int& nchannels)
{
QImage image;
if(image.load(filename)==false)
return false;
if(image.format()!=QImage::Format_RGB32)
{
QImage temp=image.convertToFormat(QImage::Format_RGB32);
image=temp;
}
loadImage(image,pImagePlane,width,height,nchannels);
return true;
}
template <class T>
bool ImageIO::writeImage(const QString& filename, const T*& pImagePlane,int width,int height,int nchannels,ImageType type,int quality)
{
int nPixels=width*height,nElements;
nElements=nPixels*nchannels;
unsigned char* pTempBuffer;
pTempBuffer=new unsigned char[nPixels*4];
memset(pTempBuffer,0,nPixels*4);
// check whether the type is float point
bool IsFloat=false;
if(typeid(T)==typeid(double) || typeid(T)==typeid(float) || typeid(T)==typeid(long double))
IsFloat=true;
T _Max=0,_Min=0;
switch(type){
case standard:
break;
case derivative:
_Max=0;
for(int i=0;i<nPixels;i++)
{
if(IsFloat)
_Max=__max(_Max,fabs((double)pImagePlane[i]));
else
_Max=__max(_Max,abs(pImagePlane[i]));
}
break;
case normalized:
_Min=_Max=pImagePlane[0];
for(int i=1;i<nElements;i++)
{
_Min=__min(_Min,pImagePlane[i]);
_Max=__max(_Max,pImagePlane[i]);
}
break;
}
for(int i=0;i<nPixels;i++)
{
if(nchannels>=3)
{
pTempBuffer[i*4]=convertPixel(pImagePlane[i*nchannels],IsFloat,type,_Max,_Min);
pTempBuffer[i*4+1]=convertPixel(pImagePlane[i*nchannels+1],IsFloat,type,_Max,_Min);
pTempBuffer[i*4+2]=convertPixel(pImagePlane[i*nchannels+2],IsFloat,type,_Max,_Min);
}
else
for (int j=0;j<3;j++)
pTempBuffer[i*4+j]=convertPixel(pImagePlane[i*nchannels],IsFloat,type,_Max,_Min);
pTempBuffer[i*4+3]=255;
}
QImage *pQImage=new QImage(pTempBuffer,width,height,QImage::Format_RGB32);
bool result= pQImage->save(filename,0,quality);
delete pQImage;
delete pTempBuffer;
return result;
}
template <class T>
bool ImageIO::writeImage(const QString& filename, const T* pImagePlane,int width,int height,int nchannels,T min,T max,int quality)
{
int nPixels=width*height,nElements;
nElements=nPixels*nchannels;
unsigned char* pTempBuffer;
pTempBuffer=new unsigned char[nPixels*4];
memset(pTempBuffer,0,nPixels*4);
// check whether the type is float point
bool IsFloat=false;
if(typeid(T)==typeid(double) || typeid(T)==typeid(float) || typeid(T)==typeid(long double))
IsFloat=true;
T _Max=max,_Min=min;
for(int i=0;i<nPixels;i++)
{
if(nchannels>=3)
{
pTempBuffer[i*4]=convertPixel(pImagePlane[i*nchannels],IsFloat,normalized,_Max,_Min);
pTempBuffer[i*4+1]=convertPixel(pImagePlane[i*nchannels+1],IsFloat,normalized,_Max,_Min);
pTempBuffer[i*4+2]=convertPixel(pImagePlane[i*nchannels+2],IsFloat,normalized,_Max,_Min);
}
else
for (int j=0;j<3;j++)
pTempBuffer[i*4+j]=convertPixel(pImagePlane[i*nchannels],IsFloat,normalized,_Max,_Min);
pTempBuffer[i*4+3]=255;
}
QImage *pQImage=new QImage(pTempBuffer,width,height,QImage::Format_RGB32);
bool result= pQImage->save(filename,0,quality);
delete pQImage;
delete pTempBuffer;
return result;
}
template <class T>
unsigned char ImageIO::convertPixel(const T& value,bool IsFloat,ImageType type,T& _Max,T& _Min)
{
switch(type){
case standard:
if(IsFloat)
return __max(__min(value*255,255),0);
else
return __max(__min(value,255),0);
break;
case derivative:
return (double)((double)value/_Max+1)/2*255;
break;
case normalized:
return (double)(value-_Min)/(_Max-_Min)*255;
break;
}
return 0;
}
//*/