public Bitmap Apply(Bitmap srcimg, int char_size)
{
double min_pixel_area_size = 0.18;
srcimg = ImageUtils.ConvertGrayScaleToBinary(srcimg, 254);
srcimg = ImageUtils.InvertColors(srcimg);
MyConnectedComponentsAnalysisFast.MyBlobCounter char_bc = new MyConnectedComponentsAnalysisFast.MyBlobCounter();
List <MyConnectedComponentsAnalysisFast.MyBlob> char_blobs = char_bc.GetBlobs(srcimg);
ushort[] char_labels = char_bc.objectLabels;
HashSet <int> noise_char_idx_set = new HashSet <int>();
for (int i = 0; i < char_blobs.Count; i++)
{
if (((double)char_blobs[i].pixel_count / (double)char_blobs[i].area) < min_pixel_area_size) //line
{
noise_char_idx_set.Add(i);
}
if (char_blobs[i].bbx.Width < char_size &&
char_blobs[i].bbx.Height < char_size) // small cc
{
noise_char_idx_set.Add(i);
}
if (char_blobs[i].bbx.Width <char_size && char_blobs[i].bbx.Height> char_size * 3)
{
noise_char_idx_set.Add(i);
}
if (char_blobs[i].bbx.Height <char_size && char_blobs[i].bbx.Width> char_size * 3)
{
noise_char_idx_set.Add(i);
}
}
for (int i = 0; i < srcimg.Width * srcimg.Height; i++)
{
if (char_labels[i] != 0)
{
int idx = char_labels[i] - 1;
if (noise_char_idx_set.Contains(idx))
{
char_labels[i] = 0;
}
}
}
bool[,] img = new bool[srcimg.Height, srcimg.Width];
for (int i = 0; i < srcimg.Width; i++)
{
for (int j = 0; j < srcimg.Height; j++)
{
if (char_labels[j * srcimg.Width + i] == 0)
{
img[j, i] = false;
}
else
{
img[j, i] = true;
}
}
}
return(ImageUtils.ArrayBool2DToBitmap(img));
}