Exemple #1
0
void VFilter( const TwoDArray<unsigned char>& pic_data, TwoDArray<unsigned char>& out_data, const OneDArray<int>& filter, const int bits )
{
    const int offset = (1<<(bits-1));

    int sum, j, jout;

    // Do the first bit
    for (j=0, jout=0; j<filter.Last(); j+=2, jout++)
    {

        for (int i=0; i<pic_data.LengthX(); ++i)
        {
            sum = offset;
            for (int k=filter.Last(); k>=filter.First(); --k)
                sum += filter[k]*static_cast<int>( pic_data[std::max(j-k,0)][i] );
            sum >>= bits;
            sum = std::min( 255, std::max( 0, sum) );
            out_data[jout][i] = static_cast<unsigned char>( sum );
        }// i

    }// j

    // Do the middle bit
    for (; j<=pic_data.LastY()+filter.First(); j+=2, jout++)
    {

        for (int i=0; i<pic_data.LengthX(); ++i)
        {
            sum = offset;
            for (int k=filter.Last(); k>=filter.First(); --k)
                sum += filter[k]*static_cast<int>( pic_data[j-k][i] );
            sum >>= bits;
            sum = std::min( 255, std::max( 0, sum) );
            out_data[jout][i] = static_cast<unsigned char>( sum );
        }// i

    }// j

    // Do the last bit
    for (; j<pic_data.LengthY(); j+=2, jout++)
    {

        for (int i=0; i<pic_data.LengthX(); ++i)
        {
            sum = offset;
            for (int k=filter.Last(); k>=filter.First(); --k)
                sum += filter[k]*static_cast<int>( pic_data[std::min(j-k,pic_data.LastY())][i] );
            sum >>= bits;
            sum = std::min( 255, std::max( 0, sum) );
            out_data[jout][i] = static_cast<unsigned char>( sum );
        }// i

    }// j
}
Exemple #2
0
void setup2DArray (TwoDArray<int> &arr, int dimx, int dimy, int start_val)
{
    arr.Resize(dimx, dimy);
    int value =start_val;
    int err_count = 0;
    for (int i =arr.FirstY(); i <= arr.LastY(); i++)
    {
        for (int j =arr.FirstX(); j <= arr.LastX(); j++)
        {
            arr[i][j] = ++value;
        }
    }
    value = start_val;
    for (int i =arr.FirstY(); i <= arr.LastY(); i++)
    {
        for (int j =arr.FirstX(); j <= arr.LastX(); j++)
        {
            ++value;
            if (arr[i][j] != value)
                err_count++;
        }
    }
    CPPUNIT_ASSERT_EQUAL (err_count, 0);
}