static void randomizeGen(
const Unsigned genListLength, /* The length of the list genList. */
const Permutation *const genList[], /* The list of (generating) perms. */
const Unsigned count1, /* The minimum word length, as above. */
const Unsigned count2, /* The maximum word length, as above. */
Permutation *const randGen) /* The old and new quasi-random elt. */
{
Unsigned i,
wordLength = count1 +
( (count2 > count1) ? randInteger( 0, count2-count1) : 0);
for ( i = 1 ; i <= wordLength ; ++i )
rightMultiply( randGen, genList[ randInteger(1,genListLength) ]);
}
Word *randGroupWord(
const PermGroup *const G,
Unsigned atLevel)
{
Word *w = newTrivialWord();
Unsigned level, pt;
Permutation **svec;
for ( level = atLevel ; level <= G->baseSize ; ++level ) {
pt = G->basicOrbit[level][ randInteger(1,G->basicOrbLen[level]) ];
svec = G->schreierVec[level];
while ( svec[pt] != FIRST_IN_ORBIT ) {
w->position[++w->length] = svec[pt];
pt = svec[pt]->invImage[pt];
}
}
w->position[++w->length] = NULL;
return w;
}
Permutation *randGroupPerm(
const PermGroup *const G,
Unsigned atLevel)
{
Permutation *randPerm = newIdentityPerm( G->degree);
Unsigned level, pt, i;
Permutation **svec;
for ( level = atLevel ; level <= G->baseSize ; ++level ) {
pt = G->basicOrbit[level][ randInteger(1,G->basicOrbLen[level]) ];
svec = G->schreierVec[level];
while ( svec[pt] != FIRST_IN_ORBIT ) {
for ( i = 1 ; i <= G->degree ; ++i )
randPerm->image[i] = svec[pt]->invImage[ randPerm->image[i] ];
pt = svec[pt]->invImage[pt];
}
}
randPerm->invImage = NULL;
adjoinInvImage( randPerm);
return randPerm;
}
void SplitFunctionImgPatch<BaseType, BaseTypeIntegral, AppContext>::SetRandomValues()
{
// some initializations
int min_w, min_h, max_w, max_h;
int min_x, min_y, max_x, max_y;
// if set, draw a random split function from the list
// and set the member of SplitFunctionImgPatch
if (m_appcontext->use_random_split_function){
int num_available_split_functions = m_appcontext->split_function_type_list.size();
this->m_splitfunction_type = m_appcontext->split_function_type_list[randInteger(0, num_available_split_functions-1)];
} else {
// use the default implementation
this->m_splitfunction_type = m_appcontext->split_function_type;
}
// get some patch sub-regions
switch (this->m_splitfunction_type){
case SPLITFUNCTION_TYPE::SINGLEPIXELTEST:
this->px1.x = randInteger(0, m_appcontext->patch_size[1]-1);
this->px1.y = randInteger(0, m_appcontext->patch_size[0]-1);
break;
case SPLITFUNCTION_TYPE::PIXELPAIRTEST:
this->px1.x = randInteger(0, m_appcontext->patch_size[1]-1);
this->px1.y = randInteger(0, m_appcontext->patch_size[0]-1);
this->px2.x = randInteger(0, m_appcontext->patch_size[1]-1);
this->px2.y = randInteger(0, m_appcontext->patch_size[0]-1);
break;
case SPLITFUNCTION_TYPE::PIXELPAIRTESTCONDITIONED:
this->px1.x = randInteger(0, m_appcontext->patch_size[1]-1);
this->px1.y = randInteger(0, m_appcontext->patch_size[0]-1);
int min_x, max_x, min_y, max_y;
max_w = 10;
min_x = max(0, px1.x - max_w);
max_x = min(m_appcontext->patch_size[1]-1, px1.x + max_w);
min_y = max(0, px1.y - max_w);
max_y = min(m_appcontext->patch_size[0]-1, px1.y + max_w);
this->px2.x = randInteger(min_x, max_x);
this->px2.y = randInteger(min_y, max_y);
break;
case SPLITFUNCTION_TYPE::HAAR_LIKE:
min_w = 1;
min_h = 1;
//max_w = static_cast<int>((double)m_appcontext->patch_size[1]*0.5);
//max_h = static_cast<int>((double)m_appcontext->patch_size[0]*0.5);
max_w = static_cast<int>((double)m_appcontext->patch_size[1]*0.90);
max_h = static_cast<int>((double)m_appcontext->patch_size[0]*0.90);
this->re1.width = randInteger(min_w, max_w);
this->re1.height = randInteger(min_w, max_w);
this->re1.x = randInteger(0, m_appcontext->patch_size[1]-re1.width);
this->re1.y = randInteger(0, m_appcontext->patch_size[0]-re1.height);
this->re2.width = randInteger(min_w, max_w);
this->re2.height = randInteger(min_w, max_w);
this->re2.x = randInteger(0, m_appcontext->patch_size[1]-re2.width);
this->re2.y = randInteger(0, m_appcontext->patch_size[0]-re2.height);
break;
case SPLITFUNCTION_TYPE::ORDINAL:
// this->pxs.resize(m_appcontext->ordinal_split_k);
// for (size_t k = 0; k < pxs.size(); k++)
// {
// pxs[k].x = randInteger(0, m_appcontext->patch_size[1]-1);
// pxs[k].y = randInteger(0, m_appcontext->patch_size[0]-1);
// }
// ORDINAL IS IMPLEMENTED HERE, BUT NOT IN GETRESPONSE?????
throw std::logic_error("SplitFunction (set random value): Ordinal split functions not implemented yet!");
break;
default:
throw std::runtime_error("SplitFunction: unknown split-type not implemented");
}
// define the feature channels
this->ch1 = randInteger(0, m_appcontext->num_feature_channels-1);
if (m_appcontext->split_channel_selection == 0)
// use the same channel
this->ch2 = this->ch1;
else if (m_appcontext->split_channel_selection == 1)
// use 2 random channels
this->ch2 = randInteger(0, m_appcontext->num_feature_channels-1);
else if (m_appcontext->split_channel_selection == 2)
{
// 50/50 chance of using same channel or using 2 random channels.
if (randDouble() > 0.5)
this->ch2 = this->ch1;
else
this->ch2 = randInteger(0, m_appcontext->num_feature_channels-1);
}
else
throw std::runtime_error("SplitFunction: unknown channel-selection type");
}
