How to find image border via bitmap in c#?
How to find image border via bitmap in c#?
i want to image border via bitmap but some pixel remaining in draw border how can i cover all border pixel in image?
Datatable Data
GetImageDataId PixelName PixelA PixelR PixelG PixelB PixelXCordinate PixelYCordinate
1 ffbcbcbc 255 188 188 188 0 0
2 ffb5b5b5 255 181 181 181 0 1
3 ffb7b7b7 255 183 183 183 0 2
4 ffb7b7b7 255 183 183 183 0 3
5 ffb7b7b7 255 183 183 183 0 4
Code
if (dt1.Rows.Count > 0)
{
int p = 2;
progressBar1.Visible = true;
for (int r = dt1.Rows.Count - 1; r >= 1; r--)
{
if (dt1.Rows[r]["PixelName"].ToString() == "ffb7b7b7")
{
// DataTable dtf = dt1.Select("PixelYCordinate='" + r + "'AND PixelXCordinate ='" + Convert.ToInt32(r - 1) + "'").CopyToDataTable();
// DataTable dtp = dt1.Select("PixelXCordinate='" + r + "'AND PixelYCordinate ='" + Convert.ToInt32(r - 1) + "'").CopyToDataTable();
if (dt1.Rows[r]["PixelName"].ToString() == dt1.Rows[r - 1]["PixelName"].ToString() && dt1.Rows[r]["PixelName"].ToString() == "ffb7b7b7")
{
}
else if (dt1.Rows[r]["PixelName"].ToString() == "ffb7b7b7")
{
for (int k = 0; k < p; k++)
{
b.SetPixel(Convert.ToInt32(dt1.Rows[r]["PixelXCordinate"]), Convert.ToInt32(dt1.Rows[r - k]["PixelYCordinate"]), Color.FromArgb(255, 255, 0, 0));
pictureBox1.Image = b;
}
}
r = r - p - 1;
}
}
Also: It seems you are not looking for 'image border(s)' but want to do 'edge detection'.
– TaW
Jun 20 at 8:42
I think you need canny edge detection using EmguCV
– user8190410
Jun 20 at 15:33
Why are you comparing strings? Just use
0xffb7b7b7 notation of you want to write hex values in your code. btw, "Coordinate" has two o's in it...– Nyerguds
Jun 21 at 7:16
0xffb7b7b7
More details on a general edge-detection algorithm can be found here.
– Nyerguds
Jun 21 at 7:22
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You are comapring for equality. This will only work well if there is no anti-aliasing in the pixels..
– TaW
Jun 20 at 8:21