extern "C" DLL_EXPORT int extractMICanny(const char* imagenamefile, double* feature)
{
CImg m_img(MODE_RGB);
int re = 0;
if (m_img.read_JPEG_file(imagenamefile))
{
CFeatureBase* ft = new CShapeFeature(&m_img);
if (ft->get_feature())
{
for (int i=0; i<ft->m_dimension; ++i)
{
feature[i] = ft->m_feature[i];
}
re = 1;
}
delete ft;
}
// no need, deallocate is called in the destructor.
//m_img.deallocate(m_img.m_mode);
return re;
}
Colour TextureMaterial::get_colour(Point2D tex_coords) const {
// int x = tex_coords[0] * m_img.width();
// int y = (1 - tex_coords[1]) * m_img.height();
// return Colour(m_img(x, y, 0), m_img(x, y, 1), m_img(x, y, 2));
/////////correct?
double u=tex_coords[0];
double v=tex_coords[1];
double di = u * (double)(m_img.width()-1);
double dj = v * (double)(m_img.height()-1);
int i = di;
int j = dj;
// Wrap around if the coordinates are out of bounds
int i1 = ((i+1) >= m_img.width()) ? 0 : i+1;
int j1 = ((j+1) >= m_img.height()) ? 0 : j+1;
// Get the barycentric coordinates between pixels
double up = di - i;
double vp = dj - j;
// Bilinear interpolation between pixel values, basically a weighted average of the sourrounding pixels
// using the barycentric coordinates up, vp
return (1-up)*(1-vp)*Colour(m_img(i, j, 0), m_img(i, j, 1), m_img(i, j, 2)) +
(1-up)*(vp)*Colour(m_img(i, j1, 0), m_img(i, j1, 1), m_img(i, j1, 2)) +
(up)*(1-vp)*Colour(m_img(i1, j, 0), m_img(i1, j, 1), m_img(i1, j, 2)) +
(up)*(vp)*Colour(m_img(i1, j1, 0), m_img(i1, j1, 1), m_img(i1, j1, 2));
}
