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POObtaing the ROI in Visual basic errors in code after conversion from C
 

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  1. POObtaing the ROI in Visual basic errors in code after conversion from C
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    <p>I've been working on obtaining the ROI of an image, I'm trying to get a square shaped box that will hoover around the region an be able to click and get the standard deviation. I'm familiar with c so i used the c to VB converter, but im getting errors that the statement is not valid in namespace. Everything seems to compatible to VB code. I will be grateful for any suggestions on this matter. Thanks</p> <pre><code>Private Function DrawRoi(Image As Bitmap, rect As RectangleF) As oid Dim roi As New Rectangle() roi.X = CInt(CSng(Image.Width) * rect.X) roi.Y = CInt(CSng(Image.Height) * rect.Y) roi.Width = CInt(CSng(Image.Width) * rect.Width) roi.Height = CInt(CSng(Image.Height) * rect.Height) Dim timer As New Stopwatch() timer.Start() ' graphics manipulation takes about 240ms on 1080p image Using roiMaskImage As Bitmap = CreateRoiMaskImage(ImageWithRoi.Width, ImageWithRoi.Height, roi) Using g As Graphics = Graphics.FromImage(ImageWithRoi) g.DrawImage(Image, 0, 0) g.DrawImage(roiMaskImage, 0, 0) Dim borderPen As Pen = CreateRoiBorderPen(ImageWithRoi) g.DrawRectangle(borderPen, roi) End Using End Using Debug.WriteLine("roi graphics: {0}ms", timer.ElapsedMilliseconds) Me.imagePictureBox.Image = ImageWithRoi End Function Private Function CreateRoiMaskImage(width As Integer, height As Integer, roi As Rectangle) As Bitmap Dim image As New Bitmap(width, height, PixelFormat.Format32bppArgb) Using g As Graphics = Graphics.FromImage(image) Dim dimBrush As New SolidBrush(Color.FromArgb(64, 0, 0, 0)) g.FillRectangle(dimBrush, 0, 0, width, height) Dim roiBrush As New SolidBrush(Color.Red) g.FillRectangle(roiBrush, roi) image.MakeTransparent(Color.Red) Return image End Using End Function </code></pre>
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    1. USKen White
    1. USdirty_sanchez
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    1. COWhich line(s) are giving you the errors? What is the *exact* error message you're getting? This looks like VB6 code, and your tag is for `vb.net`; they're not the same thing, and code is not directly usable between them.
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      1. POObtaing the ROI in Visual basic errors in code after conversion from C
      1. USKen White
    2. CO@KenWhite: This is VB.NET code.
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      1. POObtaing the ROI in Visual basic errors in code after conversion from C
      1. USHardCode
    3. CO@HardCode: Thanks. It looked VB6ish to me, but I wasn't positive (which is why I said "looks like" and not "is"). :-) The questions remain, though.
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      1. POObtaing the ROI in Visual basic errors in code after conversion from C
      1. USKen White
 

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