/// <summary>
/// show the histogram in an image object
/// </summary>
/// <param name="img"></param>
public void Show(classimage img)
{
int prev_x = 0, prev_y = 0;
img.clear();
for (int i = 0; i < no_of_levels; i++)
{
int x = i * img.width / no_of_levels;
int y = img.height - (level[i] * (img.height * 8 / 10) / maxval);
if (i > 0)
{
img.drawLine(prev_x, prev_y, x, y, 0, 255, 0, 0);
}
prev_x = x;
prev_y = y;
}
}
//------------------------------------------------------------------------------------------------------------------------
//detects the centre points of image
//------------------------------------------------------------------------------------------------------------------------
public int detectBlobCentres(classimage sourceimage, classimage tempimage, int min_volume, ref int average_volume, ref int average_radius, int[,] blob_data, int no_of_angles, classimage colour_image, int[,,] radius_lookup)
{
int x,y,no_of_blobs;
int tx,ty,bx,by,cx,cy;
long pixels,av_r,av_g,av_b,av_x,av_y,av_vol,av_rad;
clear();
tempimage.clear();
no_of_blobs=0;
av_vol=0;
av_rad=0;
for (x=1;x<width-1;x++)
{
for (y=1;y<height-1;y++)
{
if (sourceimage.image[x,y,0]>0)
{
pixels=0;
av_x=0; av_y=0;
av_r=0; av_g=0; av_b=0;
tx=x; ty=y; bx=x; by=y;
floodFill(x,y,0,100,100,100,ref tx,ref ty,ref bx,ref by,ref pixels,ref av_r,ref av_g,ref av_b,sourceimage,ref av_x,ref av_y,false,0,tempimage,colour_image);
if (pixels>min_volume)
{
cx = (int)(av_x / pixels);
cy = (int)(av_y / pixels);
image[cx,cy,0]=255;
image[cx,cy,1]=255;
image[cx,cy,2]=255;
av_vol += pixels;
av_rad += (((bx-tx) + (by-ty))/2);
//update blob data
if (no_of_blobs<2000)
{
blob_data[no_of_blobs,0] = (int)pixels;
blob_data[no_of_blobs,1] = cx;
blob_data[no_of_blobs,2] = cy;
blob_data[no_of_blobs,3] = bx-tx;
blob_data[no_of_blobs,4] = by-ty;
blob_data[no_of_blobs,5] = (int)(av_r / pixels);
blob_data[no_of_blobs,6] = (int)(av_g / pixels);
blob_data[no_of_blobs,7] = (int)(av_b / pixels);
if (no_of_angles>1) tempimage.getBlobShape(no_of_angles,cx,cy,tx,ty,bx,by,blob_data,no_of_blobs,8,radius_lookup);
}
no_of_blobs++;
}
tempimage.clearArea(tx,ty,bx,by);
}
}
}
if (no_of_blobs>0)
{
average_volume = (int)(av_vol / no_of_blobs);
average_radius = (int)(av_rad / no_of_blobs);
}
return(no_of_blobs);
}