Problem with merging images c#

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I am trying to merge multiple images using Windows form aplication c#.

here is my code:

C#

private void btn_save_image_Click(object sender, EventArgs e)
       {
           Graphics g = Graphics.FromImage(loaded_image); // "loaded_image" is the initial image

           g.DrawImage(pb.Image, pb.Location); // Drawing "pb" in initial image 

           SaveFileDialog sf = new SaveFileDialog();
           if (sf.ShowDialog() == DialogResult.OK)
           {
               loaded_image.Save(sf.FileName + ".jpg"); // saving the image

           }
       }

The problem is:

When the image is saved the image "pb" isn't in the place where i kept it in initial image.

Example: I my application I added a image of a cap over a dog's head. When i save it and open the .jpg file then, the image of cap isn't in dog's head- it's in dog's ear.

How should i fix it ?

Posted 9-Jan-15 23:00pm

BibhutiAlmighty

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OriginalGriff · Answer 1 · 2015-01-09T23:21:00

I assume that you are moving an image on screen over a separate image on screen?

You need to start looking at the Location property, and whit it is in respect of - and also at any scaling which is being done to the displayed image(s).

At a guess, your "loaded_image" is in a PictureBox, and is being scaled to fit the box: so it looks like the "cap fits" but in reality the location is relative to the scaled image on display and not the original-sized image you are drawing it onto later.