void HomogeneousPoint3fIntegralImage::compute(const Eigen::MatrixXi &indices, const HomogeneousPoint3fVector &points) {
if (cols() != indices.cols() || rows() != indices.rows())
resize(indices.rows(), indices.cols());
clear();
HomogeneousPoint3fAccumulator *acc = data();
const int *pointIndex = indices.data();
int s = rows() * cols();
// fill the accumulators with the points
for (int i=0; i<s; i++, acc++, pointIndex++){
if (*pointIndex<0)
continue;
const HomogeneousPoint3f& point = points[*pointIndex];
acc->operator += (point);
}
// fill by column
#pragma omp parallel for
for (int c=0; c<cols(); c++){
for (int r=1; r<rows(); r++){
coeffRef(r,c) += coeffRef(r-1,c);
}
}
// fill by row
#pragma omp parallel for
for (int r=0; r<rows(); r++){
for (int c=1; c<cols(); c++){
coeffRef(r,c) += coeffRef(r,c-1);
}
}
}
HomogeneousPoint3fAccumulator HomogeneousPoint3fIntegralImage::getRegion(int xmin, int xmax, int ymin, int ymax) const {
HomogeneousPoint3fAccumulator pa;
if (! rows() || !cols())
return pa;
xmin = _clamp(xmin-1, 0, rows()-1);
xmax = _clamp(xmax-1, 0, rows()-1);
ymin = _clamp(ymin-1, 0, cols()-1);
ymax = _clamp(ymax-1, 0, cols()-1);
pa = coeffRef(xmax,ymax); //total
pa += coeffRef(xmin,ymin); //upper right
pa -= coeffRef(xmin, ymax); //upper rectangle
pa -= coeffRef(xmax, ymin); //rightmost rectangle
return pa;
}
void Bitmap::printB64Encoded(const Vector2i &glbSize, const Vector2i &lclSize, const Point2i &offset, const int percent) {
png::image<png::rgb_pixel> img(cols(), rows());
for(int i=0;i < rows();i++)
for(int j=0;j<cols();j++)
{
Color4f curColor = coeffRef(i, j);
png::rgb_pixel pixel((int) (clamp(std::pow(curColor(0), 1.0f / m_gamma), 0.0f, 1.0f) * 255.0f),
(int) (clamp(std::pow(curColor(1), 1.0f / m_gamma), 0.0f, 1.0f) * 255.0f),
(int) (clamp(std::pow(curColor(2), 1.0f / m_gamma), 0.0f, 1.0f) * 255.0f));
img.set_pixel(j, i, pixel);
}
std::ostringstream buf;
img.write_stream(buf);
const std::string s = buf.str();
//ToDo write function convert the image to base64 data @Markus
std::string b64imgData = base64_encode(reinterpret_cast<unsigned char const*>(s.c_str()), s.length());
cout << "{\"percentage\" : " << percent << ",";
cout << "\"x\" : " << offset(0) << ",";
cout << "\"y\" : " << offset(1) << ",";
cout << "\"width\" : " << glbSize(0) << ",";
cout << "\"height\" : " << glbSize(1) << ",";
cout << "\"patchWidth\" : " << lclSize(0) << ",";
cout << "\"patchHeight\" : " << lclSize(1) << ",";
cout << "\"data\" : \"data:image/png;base64," << b64imgData << "\"}" << endl;
cout.flush();
}
void Bitmap::savePNG(const std::string &filename, const int percent) {
//cout << "{\"percentage\" : " << percent << "}" << endl;
//cout.flush();
png::image<png::rgb_pixel> img(cols(), rows());
for(int i=0;i < rows();i++)
for(int j=0;j<cols();j++)
{
Color4f curColor = coeffRef(i, j);
png::rgb_pixel pixel((int) (clamp(std::pow(curColor(0), 1.0f / m_gamma), 0.0f, 1.0f) * 255.0f),
(int) (clamp(std::pow(curColor(1), 1.0f / m_gamma), 0.0f, 1.0f) * 255.0f),
(int) (clamp(std::pow(curColor(2), 1.0f / m_gamma), 0.0f, 1.0f) * 255.0f));
img.set_pixel(j, i, pixel);
}
//Write png to file
img.write(filename);
}
