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converter.cpp
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converter.cpp
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#include "converter.hpp"
#include "opencv/cv.h"
#include "opencv/highgui.h"
#include <fstream>
#include <limits>
#include <cassert>
#include <QMessageBox>
#include <QtConcurrent/QtConcurrent>
Converter::Converter()
{
}
std::pair<long double, long double> Converter::leastsquares(const QVector<double> &x, const QVector<double> &yy)const
{
QVector<double> y = yy;
for (int i = 0; i < y.size(); ++i) {
/* if(qFuzzyCompare(y[i],0.0)){
y[i]+= std::numeric_limits<double>::epsilon();
}*/
y[i]+=1.0;
}
long double A,B,a=0,b=0, at=0, tt = 0, bt =0, tmp=0;
for(int i = 0; i < x.size(); ++i){
tmp += x[i]*x[i]*y[i];
}
a = tmp;
tmp = 0;
for(int i = 0; i < x.size(); ++i){
tmp += y[i]*log(y[i]);
}
a *= tmp;
tmp = 0;
for(int i = 0; i < x.size(); ++i){
tmp += y[i]*x[i];
}
at = tmp;
tmp = 0;
for(int i = 0; i < x.size(); ++i){
tmp += y[i]*x[i]*log(y[i]);
}
at *= tmp;
tmp = 0;
a -= at;
for(int i = 0; i < x.size(); ++i){
tmp += y[i];
}
at = tmp;
tmp = 0;
for(int i = 0; i < x.size(); ++i){
tmp += x[i]*x[i]*y[i];
}
tt = at*tmp;
tmp = 0;
for(int i = 0; i < x.size(); ++i){
tmp += x[i]*y[i];
}
tt -= tmp*tmp;
tmp = 0;
a /= tt;
A = exp(a);
for(int i = 0; i < x.size(); ++i){
tmp += y[i];
}
b = tmp;
tmp = 0;
for(int i = 0; i < x.size(); ++i){
tmp += x[i]*y[i]*log(y[i]);
}
b *= tmp;
tmp = 0;
for(int i = 0; i < x.size(); ++i){
tmp += y[i]*x[i];
}
bt = tmp;
tmp = 0;
for(int i = 0; i < x.size(); ++i){
tmp += y[i]*log(y[i]);
}
bt *= tmp;
tmp = 0;
b -= bt;
b /= tt;
B = b;
return std::make_pair(A,B);
}
void Converter::rotate(QVector<Line> &l, double angle_x, double angle_y, double angle_z){
Point origin = {0, 0, 0};
for(auto it = l.begin();it != l.end();++it){
double xt = it->x1;double yt = it->y1;double zt = it->z1;
if(fabs(angle_x) > std::numeric_limits<double>::epsilon()){
it->y1 = cos(angle_x)*(yt-origin.y) - sin(angle_x)*(zt-origin.z);
it->z1 = sin(angle_x)*(yt-origin.y) + cos(angle_x)*(zt-origin.z);
}
xt = it->x1; yt = it->y1; zt = it->z1;
if(fabs(angle_y) > std::numeric_limits<double>::epsilon()){
it->x1 = cos(angle_y)*(xt-origin.x) + sin(angle_y)*(zt-origin.z);
it->z1 = -sin(angle_y)*(xt-origin.x) + cos(angle_y)*(zt-origin.z);
}
xt = it->x1; yt = it->y1; zt = it->z1;
if(fabs(angle_z) > std::numeric_limits<double>::epsilon()){
it->x1 = cos(angle_z)*(xt-origin.x) - sin(angle_z)*(yt-origin.y);
it->y1 = sin(angle_z)*(xt-origin.x) + cos(angle_z)*(yt-origin.y);
}
xt = it->x2;yt = it->y2; zt = it->z2;
if(fabs(angle_x) > std::numeric_limits<double>::epsilon()){
it->y2 = cos(angle_x)*(yt-origin.y) - sin(angle_x)*(zt-origin.z);
it->z2 = sin(angle_x)*(yt-origin.y) + cos(angle_x)*(zt-origin.z);
}
xt = it->x2; yt = it->y2; zt = it->z2;
if(fabs(angle_y) > std::numeric_limits<double>::epsilon()){
it->x2 = cos(angle_y)*(xt-origin.x) + sin(angle_y)*(zt-origin.z);
it->z2 = -sin(angle_y)*(xt-origin.x) + cos(angle_y)*(zt-origin.z);
}
xt = it->x2; yt = it->y2; zt = it->z2;
if(fabs(angle_z) > std::numeric_limits<double>::epsilon()){
it->x2 = cos(angle_z)*(xt-origin.x) - sin(angle_z)*(yt-origin.y);
it->y2 = sin(angle_z)*(xt-origin.x) + cos(angle_z)*(yt-origin.y);
}
}
}
QVector<Line> Converter::convert(const QImage &image, Modes mode/*, int left, int top, int right, int bottom*/){
QVector<Line> result;
int left = 0,top = 0,right = image.width(),bottom = image.height();
for( int i = left; i < right; ++i){
for( int j = top; j < bottom; ++j){
Line p;
p.x1 = p.x2 = i;
p.y1 = p.y2 = j;
p.z1 = qGray(image.pixel(i,j));
p.c = p.z1;
QVector<int> v;
if(i!=left) v.push_back(qGray(image.pixel(i-1,j)));
if(i < right-1) v.push_back(qGray(image.pixel(i+1,j)));
if(j!=top) v.push_back(qGray(image.pixel(i,j-1)));
if(j < bottom-1) v.push_back(qGray(image.pixel(i,j+1)));
if(i!=left && j!= top) v.push_back(qGray(image.pixel(i-1,j-1)));
if(i < right-1 && j!=top) v.push_back(qGray(image.pixel(i+1,j-1)));
if(j < bottom-1 && i!=left) v.push_back(qGray(image.pixel(i-1,j+1)));
if(i < right-1 && j < bottom-1) v.push_back(qGray(image.pixel(i+1,j+1)));
int min = *(std::min_element(v.begin(),v.end()));
if(min < qGray(image.pixel(i,j))){
p.z2 = p.z1 - min;
}else{
p.z2 = p.z1;
}
result.push_back(p);
}
}
switch (mode) {
case ISO:
rotate(result, 3.1415/180*35.2,3.1415/4,-3.1415/4);
break;
case BOTTOM:
rotate(result, 3.1415/180*90,0,0);
break;
case LEFT:
rotate(result, 3.1415/180*90,0,0);
rotate(result, 0, 3.1415/180*90,0);
break;
case RIGHT:
rotate(result, 3.1415/180*90,0,0);
rotate(result, 0, -3.1415/180*90,0);
break;
default:
break;
}
return result;
}
bool saveImageToFile(QImage image, const QString filename){
return image.save(filename, "BMP", 100);
}
int Converter::processVideo(QString s)
{
QTime timer;
timer.start();
QList<QFuture<bool>> fv;
CvCapture * capture = cvCaptureFromAVI(s.toStdString().c_str());
if(!capture)
{
return 0;
}
//int fps = (int) cvGetCaptureProperty(capture, CV_CAP_PROP_FPS);
// qDebug() << "* FPS: %d" << fps << "\n";
IplImage* frame = NULL;
int frame_number = 0;
while ((frame = cvQueryFrame(capture))) {
char filename[100];
strcpy(filename, "frame_");
char frame_id[30];
sprintf(frame_id,"%d",frame_number);
strcat(filename, frame_id);
strcat(filename, ".bmp");
QImage img = IplImage2QImage(frame).mirrored(false, true);
QFuture<bool> fb = QtConcurrent::run(&saveImageToFile, img, QString(filename));
fv.append(fb);
frame_number++;
}
cvReleaseCapture(&capture);
foreach (auto& x, fv) {
x.result();
}
std::cerr << "time: " << timer.elapsed() << std::endl;
return frame_number;
}
double Converter::calculate(const QVector<double> &res, const QVector<double> &pres, double val) const
{
/*double sum = 0.0,x1 = 0.0,y1 = 0.0,y0=0.0,x0=0.0;
for(auto it = res.begin(); it != res.end(); ++it){
if(*it > val){
if(it == res.begin()){
x0 = *res.begin();
y0 = *pres.begin();
x1 = *(res.begin()+1);
y1 = *(pres.begin()+1);
break;
}
x1 = *it;
y1 = pres[it - res.begin()];
x0 = *(it-1);
y0 = pres[it - res.begin() - 1];
break;
}
if(it + 1 == res.end()){
x0 = *(it-1);
y0 = pres[res.size()-2];
x1 = *it;
y1 = pres[res.size()-1];
}
}
sum = y0 + (y1 - y0) * (val - x0) / ( x1 - x0);*/
/*double sum=0,l=1;
for(int j = 0;j < res.size(); ++j){
for(int i = 0; i < res.size(); ++i){
if( j != i){
l*= (val - res[i])/(double)(res[j]-res[i]);
}
}
sum += l*pres[j];
l = 1;
}*/
auto p = leastsquares(res,pres);
double sum = p.first * exp(p.second*val)-1.0;
return sum;
}
QImage Converter::IplImage2QImage(const IplImage *iplImage)
{
int height = iplImage->height;
int width = iplImage->width;
const uchar *qImageBuffer =(const uchar*)iplImage->imageData;
QImage img(qImageBuffer, width, height, QImage::Format_RGB888);
return img.rgbSwapped();
}
QVector<int> Converter::dbscan(QVector<QPoint> &v)
{
const int n = v.size();
int L_min = 10;
int kol = 5;
std::fstream f("dbscan.cfg");
f >> L_min >> kol;
QVector<QVector<int>> L;
QVector<int> rez;
QVector<int> marked;
QVector<int> group;
rez.resize(n);
L.resize(n);
marked.resize(n);
group.resize(n);
for(QVector<int> &x : L ){
x.resize(n);
}
for(int i = 0; i < n; ++i){
for(int j = 0; j < n; ++j){
L[i][j] = dist(v[i],v[j]) <= L_min;
if(L[i][j]){
rez[i]++;
}
}
for(int j = 0; j < n; j++){
L[i][j] *= j;
}
}
int c = 1;
for(int i = 0; i < n; ++i){
if(marked[i] == 0){
if(rez[i] < kol){
marked[i] = 1;
group[i] = -1;
}else{
auto uvec = group;
group[i] = c;
while(!std::equal(uvec.begin(),uvec.end(),group.begin())){
uvec = group;
for(int j = 0; j < n; ++j){
if(group[j] == c && marked[j] == 0){
if(rez[i] < kol){
marked[j] = 1;
group[j] = -1;
}else{
marked[j] = 1;
for(int k = 0; k < n; ++k){
if(L[j][k] > 0){
group[k] = c;
}
}
}
}
}
}
c++;
}
}else{
continue;
}
}
return group;
}