Various Filters can be applied to an image one of Such kind is the Diffuse filter. The diffuse filter uses the rnd function to introduce some randomness to the image and give it a painterly look.
For i = 1 To Picturebox.ScaleHeight - 3 For j = 1 To Picturebox.ScaleWidth - 3 pixval = Picturebox.Point(j + CInt(Rnd * 10), _ i + CInt(Rnd * 10)) red_val = "&h" & Mid$(CStr(Hex(pixval)), 5, 2) green_val = "&h" & Mid$(CStr(Hex(pixval)), 3, 2) blue_val = "&h" & Mid$(CStr(Hex(pixval)), 1, 2) If red_val = "&h" Then red_val = "&h0" If green_val = "&h" Then green_val = "&h0" If blue_val = "&h" Then blue_val = "&h0" Picturebox.PSet (j, i), RGB(red_val, green_val, _ blue_val) Next Next
This Code above Traverses the images as a two dimensional array picks all the pixels and randomly rearranges the pixels to some fixed diameter. Since this happens to all the pixels a kind of diffused effeect can be seen on the images.