Esempio n. 1
0
void HFilter( const TwoDArray<unsigned char>& pic_data, TwoDArray<unsigned char>& out_data, const OneDArray<int>& filter, const int bits )
{
    unsigned char* line_data;
    const int offset = (1<<(bits-1));

    int sum;
    int i, iout;

    for (int j=0; j<pic_data.LengthY(); ++j)
    {
        line_data = out_data[j];
        // Do the first bit
        for (i=0, iout=0; i<filter.Last(); i+=2, iout++)
        {
            sum = offset;
            for (int k=filter.Last(); k>=filter.First(); --k)
                sum += filter[k]*static_cast<int>(pic_data[j][std::max(i-k,0)]);
            sum >>= bits;
            sum = std::min( 255, std::max( 0, sum) );
            line_data[iout] = static_cast<unsigned char>( sum );
        }// i
        // Do the middle bit
        for (; i<=pic_data.LastX()+filter.First(); i+=2, iout++)
        {
            sum = offset;
            for (int k=filter.Last(); k>=filter.First(); --k)
                sum += filter[k]*static_cast<int>( pic_data[j][i-k] );
            sum >>= bits;
            sum = std::min( 255, std::max( 0, sum) );
            line_data[iout] = static_cast<unsigned char>( sum );
        }// i
        // Do the last bit
	for (; i<pic_data.LengthX(); i+=2, iout++)
	{
            sum = offset;
            for (int k=filter.Last(); k>=filter.First(); --k)
                sum += filter[k]*static_cast<int>( pic_data[j][std::min(i-k,pic_data.LastX())] );
            sum >>= bits;
            sum = std::min( 255, std::max( 0, sum) );
            line_data[iout] = static_cast<unsigned char>( sum );
        }// i
    }// j

}
Esempio n. 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);
}