void computeProjectedSynthNeighborhoods(List <PCA /*_Synth*/> pcaSynth)
{
bool clean_neigh = false;
// if synth neighborhoods not available, compute them
if (m_SynthNeighborhoods == null)
{
computeSynthNeighborhoods();
clean_neigh = true;
}
{
ScopeTimer tm = new ScopeTimer("[computeProjectedSynthNeighborhoods]");
m_ProjectedSynthNeighborhoods = new NeighborhoodSynth[mNumLevels][];
// foreach level
for (int l = 0; l < mNumLevels; l++)
{
m_ProjectedSynthNeighborhoods[l] = new NeighborhoodSynth[mOwner.recoloredStack(l).getWidth() * mOwner.recoloredStack(l).getHeight()];
for (int j = 0; j < mOwner.recoloredStack(l).getHeight(); j++)
{
for (int i = 0; i < mOwner.recoloredStack(l).getWidth(); i++)
{
m_ProjectedSynthNeighborhoods[l][i + j * mOwner.recoloredStack(l).getWidth()] = new NeighborhoodSynth();
NeighborhoodSynth neigh = m_SynthNeighborhoods[l][i + j * mOwner.recoloredStack(l).getWidth()];
NeighborhoodSynth proj = m_ProjectedSynthNeighborhoods[l][i + j * mOwner.recoloredStack(l).getWidth()];
pcaSynth[l].project(neigh, Globals.NUM_RUNTIME_PCA_COMPONENTS, ref proj);
proj.setIJ(i, j);
}
}
}
tm.destroy();
tm = null;
}
// clean RT neighborhoods
if (clean_neigh)
{
m_SynthNeighborhoods = null;
}
}
public Quantizer(MultiDimFloatTexture tex, int qbits, float percent)
{
Globals.Assert(percent > 0.0f && percent <= 100.0f);
ScopeTimer tm = new ScopeTimer("[Quantizer]");
m_Texture = tex;
m_Quantized = new MultiDimIntTexture(tex.width(), tex.height(), tex.numComp());
m_iQBits = qbits;
m_Mean = new float[tex.numComp()];
m_StdDev = new float[tex.numComp()];
m_Center = new float[tex.numComp()];
m_Radius = new float[tex.numComp()];
// . compute std dev and mean of every components
float [] sum = new float[tex.numComp()];
float [] sumsq = new float[tex.numComp()];
for (int j = 0; j < tex.height(); j++)
{
for (int i = 0; i < tex.width(); i++)
{
for (int c = 0; c < tex.numComp(); c++)
{
float f = tex.get(i, j, c);
sum[c] += f;
sumsq[c] += f * f;
}
}
}
float num = (float)(tex.width() * tex.height());
for (int c = 0; c < tex.numComp(); c++)
{
m_Mean[c] = sum[c] / num;
float sqstddev = (sumsq[c] - sum[c] * sum[c] / num) / (num - 1.0f);
if (sqstddev > BMathLib.cFloatCompareEpsilon)
{
m_StdDev[c] = (float)Math.Sqrt(sqstddev);
}
else
{
m_StdDev[c] = 0.0f;
}
}
// . for every component
// compute center and radius so that 'percent' samples are within quantization space
for (int c = 0; c < tex.numComp(); c++)
{
float [] samples = new float[tex.width() * tex.height()];
// add samples to array
for (int j = 0; j < tex.height(); j++)
{
for (int i = 0; i < tex.width(); i++)
{
samples[i + j * tex.width()] = tex.get(i, j, c);
}
}
// sort array
Sort.RadixSort rs = new Sort.RadixSort();
rs.Sort(samples);//sort(samples.begin(),samples.end());
// find left and right elements so that 'percent' elements are inside
float pout = ((100.0f - percent) / 2) / 100.0f;
int left = (int)((samples.Length - 1) * pout);
int right = (int)((samples.Length - 1) * (1.0f - pout));
m_Center[c] = (samples[right] + samples[left]) / 2.0f;
m_Radius[c] = samples[right] - samples[left];
}
// . quantize
int num_outside = 0;
for (int j = 0; j < tex.height(); j++)
{
for (int i = 0; i < tex.width(); i++)
{
if (!quantizePixel(tex.numComp(), tex, tex.getpixIndex(i, j), m_Quantized.getpixIndex(i, j)))
{
num_outside++;
}
}
}
float percent_out = num_outside * 100.0f / (tex.width() * tex.height());
if (Globals.PRINT_DEBUG_MSG)
{
Debug.Print("-----------.>> Quantizer: num outside = " + percent_out + "%");
}
tm.destroy();
tm = null;
}
// -----------------------------------------------------
MultiDimFloatTexture enlargeTexture(MultiDimFloatTexture ex, int type)
{
ScopeTimer tm = new ScopeTimer("[Exemplar::enlargeTexture]");
int w = ex.getWidth();
int h = ex.getHeight();
MultiDimFloatTexture large = new MultiDimFloatTexture(w * 2, h * 2, ex.numComp());
for (int j = 0; j < h * 2; j++)
{
for (int i = 0; i < w * 2; i++)
{
int ri, rj;
// where to read ?
if (type == 0)
{
// Toroidal
// ri
if (i < w / 2)
{
ri = (i + w / 2) % w;
}
else if (i < w + w / 2)
{
ri = i - w / 2;
}
else
{
ri = ((i - w / 2) % w);
}
// rj
if (j < h / 2)
{
rj = (j + h / 2) % h;
}
else if (j < h + h / 2)
{
rj = j - h / 2;
}
else
{
rj = ((j - h / 2) % h);
}
}
else
{
// Mirror
// ri
if (i < w / 2)
{
ri = (w / 2 - i);
}
else if (i < w + w / 2)
{
ri = i - w / 2;
}
else
{
ri = (w - 1 - (i - (w / 2 + w)));
}
// rj
if (j < h / 2)
{
rj = (h / 2 - j);
}
else if (j < h + h / 2)
{
rj = j - h / 2;
}
else
{
rj = (h - 1 - (j - (h / 2 + h)));
}
}
for (int c = 0; c < ex.numComp(); c++)
{
large.set(ex.get(ri, rj, c), i, j, c);
}
}
}
tm.destroy();
tm = null;
return(large);
}
void computeSynthNeighborhoods()
{
ScopeTimer tm = new ScopeTimer("[computeSynthNeighborhoods]");
m_SynthNeighborhoods = new NeighborhoodSynth[mNumLevels][];
// foreach level
for (int level = 0; level < mNumLevels; level++)
{
MultiDimFloatTexture recolored_level = null;
if (Globals.isDefined("4D"))
{
// . keep only 4 dimension from recolored exemplar
MultiDimFloatTexture level_4D = new MultiDimFloatTexture(mOwner.recoloredStack(level).width(), mOwner.recoloredStack(level).height(), mOwner.recoloredStack(level).numComp());
int w = level_4D.getWidth();
int h = level_4D.getHeight();
Globals.Assert(w == mOwner.stack(level).getWidth() && h == mOwner.stack(level).height());
Globals.Assert(level_4D.numComp() == Globals.NUM_RECOLORED_PCA_COMPONENTS);
for (int i = 0; i < w; i++)
{
for (int j = 0; j < h; j++)
{
// . copy first four channels
for (int c = 0; c < 4; c++)
{
level_4D.set(mOwner.recoloredStack(level).get(i, j, c), i, j, c);
}
// . zero out all channels above 4
for (int c = 4; c < level_4D.numComp(); c++)
{
level_4D.set(0, i, j, c);
}
}
}
recolored_level = level_4D;
}
else
{
// . keep all dimensions
recolored_level = mOwner.recoloredStack(level);
}
m_SynthNeighborhoods[level] = new NeighborhoodSynth[recolored_level.width() * recolored_level.height()];
stack_accessor_v2 access = new stack_accessor_v2(level);
for (int j = 0; j < recolored_level.height(); j++)
{
for (int i = 0; i < recolored_level.width(); i++)
{
int index = i + j * recolored_level.width();
m_SynthNeighborhoods[level][index] = new NeighborhoodSynth();
m_SynthNeighborhoods[level][index].construct(
recolored_level,
access,
(!mOwner.isToroidal()) && level < (mNumLevels - Globals.NUM_LEVELS_WITHOUT_BORDER),
//(!m_bToroidal) && l < FIRST_LEVEL_WITH_BORDER,
level, i, j);
}
}
}
tm.destroy();
tm = null;
}
