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Hello Everybody,

My Screen DPI is 96 and my printer DPI is 600 and I am trying to print an Image. It prints successfully but Image quality is not fine.

VB
Private Sub PrintDocument1_PrintPage(ByVal sender As System.Object, ByVal e As System.Drawing.Printing.PrintPageEventArgs)

   e.Graphics.DrawImage(Image,0,0, Image.Width, Image.Height)

End Sub

So, please help me. How can I improve the quality of Image?

Thanks
Posted
Updated 18-Nov-10 6:26am
v3

You cannot change the DPI of the printer, well, not as low as you want it. You can magnify the image to scale up the DPI, but the more you do, the fuzzier the image is going to be. You simply do not have enough data in the original image to maintain quality the larger you want to print it.
 
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Hello,

You can use this to improve the quality of an Image:

Imports System.Drawing.Drawing2D

e.Graphics.InterpolationMode = InterpolationMode.HighQualityBicubic
e.Graphics.SmoothingMode = SmoothingMode.HighQuality
e.Graphics.PixelOffsetMode = PixelOffsetMode.HighQuality
e.Graphics.CompositingQuality = CompositingQuality.HighQuality
To set the resolution you can use this:
Dim bmp As New Bitmap(Image)
bmp.SetResolution(dpiX, dpiY)
 
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