void volume_file_info::calcMinMax(unsigned int var, unsigned int time) const
{
thread_info ti(BOOST_CURRENT_FUNCTION);
volume vol;
const uint64 maxdim = 128; //read in 128^3 chunks
for(unsigned int off_z = 0; off_z < ZDim(); off_z+=maxdim)
for(unsigned int off_y = 0; off_y < YDim(); off_y+=maxdim)
for(unsigned int off_x = 0; off_x < XDim(); off_x+=maxdim)
{
dimension read_dim(std::min(XDim()-off_x,maxdim),
std::min(YDim()-off_y,maxdim),
std::min(ZDim()-off_z,maxdim));
readVolumeFile(vol,filename(),var,time,
off_x,off_y,off_z,read_dim);
if(off_x==0 && off_y==0 && off_z==0)
{
_data._min[var][time] = vol.min();
_data._max[var][time] = vol.max();
}
else
{
if(_data._min[var][time] > vol.min())
_data._min[var][time] = vol.min();
if(_data._max[var][time] < vol.max())
_data._max[var][time] = vol.max();
}
}
_data._minIsSet[var][time] = true;
_data._maxIsSet[var][time] = true;
}
Voxels& Voxels::anisotropicDiffusion(unsigned int iterations)
{
CVC::ThreadInfo ti(BOOST_CURRENT_FUNCTION);
double cn, cs, ce, cw, cu, cd;
double delta_n, delta_s, delta_e, delta_w, delta_u, delta_d;
double K_para = 3;
double Lamda_para = 0.16f;
unsigned int m;
VolMagick::uint64 i,j,k, stepnum = 0;
Voxels tempt(*this);
if(_vosm) _vosm->start(this, VoxelOperationStatusMessenger::AnisotropicDiffusion, ZDim()*iterations);
uint64 numSteps = ZDim()*iterations;
for (m=0; m<iterations; m++)
{
for (k=0; k<ZDim(); k++)
{
for (j=0; j<YDim(); j++)
for (i=0; i<XDim(); i++)
{
if (j < YDim()-1)
delta_s = (*this)(i,j+1,k) - (*this)(i,j,k);
else
delta_s = 0.0;
if (j > 0)
delta_n = (*this)(i,j-1,k) - (*this)(i,j,k);
else
delta_n = 0.0;
if (i < XDim()-1)
delta_e = (*this)(i+1,j,k) - (*this)(i,j,k);
else
delta_e = 0.0;
if (i > 0)
delta_w = (*this)(i-1,j,k) - (*this)(i,j,k);
else
delta_w = 0.0;
if (k < ZDim()-1)
delta_u = (*this)(i,j,k+1) - (*this)(i,j,k);
else
delta_u = 0.0;
if (k > 0)
delta_d = (*this)(i,j,k-1) - (*this)(i,j,k);
else
delta_d = 0.0;
cn = 1.0f / (1.0f + ((delta_n * delta_n) / (K_para * K_para)));
cs = 1.0f / (1.0f + ((delta_s * delta_s) / (K_para * K_para)));
ce = 1.0f / (1.0f + ((delta_e * delta_e) / (K_para * K_para)));
cw = 1.0f / (1.0f + ((delta_w * delta_w) / (K_para * K_para)));
cu = 1.0f / (1.0f + ((delta_u * delta_u) / (K_para * K_para)));
cd = 1.0f / (1.0f + ((delta_d * delta_d) / (K_para * K_para)));
tempt(i,j,k,
(*this)(i,j,k) +
Lamda_para * (cn * delta_n + cs * delta_s + ce * delta_e +
cw * delta_w + cu * delta_u + cd * delta_d));
}
if(_vosm) _vosm->step(this, VoxelOperationStatusMessenger::AnisotropicDiffusion, stepnum);
cvcapp.threadProgress(float(stepnum)/float(numSteps));
stepnum++;
}
(*this) = tempt;
}
if(_vosm) _vosm->end(this, VoxelOperationStatusMessenger::AnisotropicDiffusion);
cvcapp.threadProgress(1.0f);
return *this;
}
