Question

I’m developing a tool for easy picture printing with a canon selpy cp800. The Image is printed with the following methods:

Private Sub BtnPrintClick(sender As Object, e As System.EventArgs) Handles ptnPrint.Click
    If PrintDialog1.ShowDialog() = DialogResult.OK Then
        pdPrintImage.Print()
    End If
End Sub

Private Sub PdPrintImagePrintPage(sender As Object, e As System.Drawing.Printing.PrintPageEventArgs) Handles pdPrintImage.PrintPage
    e.Graphics.DrawImage(_dPictures(_sPictures(_iActiveImage)).Picture, e.Graphics.VisibleClipBounds)
End Sub

_dPictures(_sPictures(_iActiveImage)).Picture –> object of the type image

I didn’t do anything with this image. It’s only loaded with the Image.FromFile() method.

Within the following image you can see my problem. This is a scan of the image printed with this method (top) and a scan of the same image printed with the windows picture viewer. You see, the first image you see the tonal errors in the background and the shadows.

Has anyone an idea to fix this?

Answer 1

If it isn’t a bit-depth issue as Boo mentioned, it might help to set one or both of these

e.Graphics.InterpolationMode = Drawing2D.InterpolationMode.HighQualityBicubic
e.Graphics.SmoothingMode = Drawing2D.SmoothingMode.HighQuality

before doing the .DrawImage.