How to merge two images

[gopalakrishnan]

Hi to all.. I want to know how to merge two images. That is I'm having two images named like a.jpeg,b.jpeg. I want to place a.jpeg into b.jpeg to create c.jpeg. Help me to solve this..

Thanks in advance..

 

[MattP]

This should be what you're looking for. If you want to change where the image is placed change the x,y of the DrawImage method.

		Dim imgOverlay As Bitmap = Image.FromFile("C:\Temp\Images\a.jpg")
		Dim imgBackground As Bitmap = Image.FromFile("C:\Temp\Images\b.jpg")
		Dim g As Graphics = Graphics.FromImage(imgBackground)
		imgOverlay.MakeTransparent(Color.White)
		g.DrawImage(imgOverlay, 0, 0)
		g.Dispose()
		imgBackground.Save("C:\Temp\Images\c.jpg")

 

[ambusier]

To make the whole bitmap transparent (and thus, displaying it over a second one, both are visible):

Function FadeBitmap(bmp As Bitmap, OpacityPercent As Single) As Bitmap
     Dim tempBmp As New Bitmap(bmp.Width, bmp.Height, Imaging.PixelFormat.Format32bppArgb)
     OpacityPercent = Math.Min(OpacityPercent, 100)
     Using ia As New Imaging.ImageAttributes
         Dim cm As New Imaging.ColorMatrix
         cm.Matrix33 = OpacityPercent / 100.0F
         ia.SetColorMatrix(cm)
         Dim destpoints() As PointF = {New Point(0, 0), New Point(bmp.Width, 0), New Point(0, bmp.Height)}
         Using g As Graphics = Graphics.FromImage(tempBmp)
             g.Clear(Color.Transparent)
             g.DrawImage(bmp, destpoints, New RectangleF(Point.Empty, bmp.Size), GraphicsUnit.Pixel, ia)
         End Using
     End Using
     Return tempBmp
 End Function