From the Tools menu, select Library Package Manager and then click Package Manager Console
use conjurati :
PM> Install-Package Accord.Imaging
wait
add btn control


Imports Accord.Imaging
Public Class Form1
Private Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click
Dim myimage As Bitmap

myimage = New Bitmap("C:\s1.bmp")
Dim dd As New Accord.Imaging.HarrisCornersDetector
Dim l1 As List(Of AForge.IntPoint)
l1 = dd.ProcessImage(myimage)
MsgBox("")
End Sub
End Class

l1 contains the edges coordinates

read more :
https://github.com/accord-net/framework/wiki
http://accord-framework.net/

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MB over and out emp it up