//=============================================
// CNSmlDSCrypt::EncryptedL()
// Destructor.
//=============================================
EXPORT_C TDesC& CNSmlDSCrypt::EncryptedL( const TDesC& aInput )
{
delete iOutput;
iOutput = 0;
iOutput = aInput.AllocL();
TPtr ptrOutput( iOutput->Des() );
// Keys to be used in encryption / decryption.
TUint16 key1 = 0xa576;
TUint16 key2 = 0x02f9;
for (TInt i = 0; i < iOutput->Length(); i++ )
{
key1 %= key2;
key1 <<= 7;
key1 ^= key2;
key2 %= key1;
key2 <<= 3;
key2 ^= key1;
ptrOutput[i] ^= key1;
}
return *iOutput;
}
void ImageProcessor::reduceColors(cv::Mat input, cv::Mat &output, int numColors)
{
//allocate output
output = cv::Mat(input.size(), CV_8U);
//3 channel pointer to input image
cv::Mat_<cv::Vec3b>& ptrInput = (cv::Mat_<cv::Vec3b>&)input;
//1 channel pointer to output image
cv::Mat_<uchar>& ptrOutput = (cv::Mat_<uchar>&)output;
for (int y = 0; y < input.size().height; y++)
{
for(int x = 0; x < input.size().width; x++)
{
unsigned long int currCol = 0;
currCol |= (ptrInput(y, x)[0]) << 16;
currCol |= (ptrInput(y, x)[1]) << 8;
currCol |= (ptrInput(y, x)[2]) << 0;
ptrOutput(y,x) = currCol / (pow(2, 24) / numColors);
}
}
}
void ImageProcessor::connectedCompLabeling(cv::Mat input, cv::Mat &output)
{
//Allocate output and set it to zero
output = cv::Mat(input.size(), CV_16U);
output.setTo(cv::Scalar(0));
//1 channel pointer to input image
cv::Mat_<uchar>& ptrInput = (cv::Mat_<uchar>&)input;
//1 channel pointer to output image
cv::Mat_<ushort>& ptrOutput = (cv::Mat_<ushort>&)output;
//disjoint set data structure to manage the labels
unsigned long int* parent = new unsigned long int[output.size().height * output.size().width];
for(unsigned long int i = 0; i < output.size().height * output.size().width; i++) parent[i] = i;
std::vector<int> rank (output.size().height * output.size().width);
// std::vector<int> parent (output.size().height * output.size().width);
// boost::disjoint_sets<int*,int*> ds(&rank[0], &parent[0]);
// for(unsigned long int i = 0; i < output.size().height * output.size().width; i++) {ds.make_set(i);}
//first pass: Initial labeling
unsigned short int currentLabel = 0;
for (int y = 0; y < input.size().height; y++)
{
for(int x = 0; x < input.size().width; x++)
{
if (y == 0)
{
if(x == 0)
{
//First pixel. Create first label.
ptrOutput(y,x) = ++currentLabel;
}
else
{
//First row. Only check left pixel
if (ptrInput(y,x) == ptrInput(y, x - 1))
{
//same region as left pixel -> assign same label
ptrOutput(y,x) = ptrOutput(y, x - 1);
}
else
{
//different region -> create new label
ptrOutput(y,x) = ++currentLabel;
}
}
}
else
{
if(x == 0)
{
//First column. Only check top pixel
if (ptrInput(y,x) == ptrInput(y - 1, x))
{
//same region as top pixel -> assign same label
ptrOutput(y,x) = ptrOutput(y - 1, x);
}
else
{
//different region -> create new label
ptrOutput(y,x) = ++currentLabel;
}
}
else
{
//Regular column. Check top and left pixel
if (ptrInput(y,x) == ptrInput(y, x - 1) && ptrInput(y,x) == ptrInput(y - 1, x))
{
//same region as left and top pixel -> assign minimum label of both
ptrOutput(y,x) = std::min(ptrOutput(y, x - 1), ptrOutput(y - 1, x));
if (ptrOutput(y, x - 1) != ptrOutput(y - 1, x))
{
//mark labels as equivalent
//we are using the union/find algorithm for disjoint sets
ImageProcessor::unite(ImageProcessor::find(ptrOutput(y, x - 1), parent),
ImageProcessor::find(ptrOutput(y - 1, x), parent), parent);
// ds.union_set(ptrOutput(y, x - 1), ptrOutput(y - 1, x));
}
}
else
if (ptrInput(y,x) == ptrInput(y, x - 1))
{
//same region as left pixel -> assign same label
ptrOutput(y,x) = ptrOutput(y, x - 1);
}
else
if (ptrInput(y,x) == ptrInput(y - 1, x))
{
//same region as top pixel -> assign same label
ptrOutput(y,x) = ptrOutput(y - 1, x);
}
else
{
//different region -> create new label
ptrOutput(y,x) = ++currentLabel;
}
}
}
}
}
//second pass: Merge equivalent labels
for (int y = 0; y < output.size().height; y++)
{
for(int x = 0; x < output.size().width; x++)
{
//we are using the union/find algorithm for disjoint sets
ptrOutput(y,x) = (unsigned short int) ImageProcessor::find(ptrOutput(y, x), parent);
// ptrOutput(y,x) = ds.find_set(ptrOutput(y, x));
}
}
delete[] parent;
}
