replacing one part of an image

[Roset]

Hi there
I have 2 groups photos, one were everyone is smiling except one person. The other photo no-one is smiling except that one person.
I want to know how to cut and copy that one smiling person and paste with the other smiling people.
Its for PS. Hope you can understand me

[RoyL]

To anwer the question it wold be nice to see the images, otherwise you will just get a whole swag of responses telling you to use layers, selections, masking, etc. It really depends on the complexity.

[OsmosisStudios]

Seeing the images would be helpful.

[Roset]

I want to use the guy on the right in this photo

And replace him in this photo

[RoyL]

This one is fairly simple to do.

Load both images.
Using the Lasso tool select the face area on the image with the smile. In Select>Modify change feather to 3.
Using the Move tool, move the selection into the other image and place it roughly where it should go.
Use Edit>Free Transform to rotate the head until it looks natural.
In Tools>Blur slect Gaussian Blur and add 0.5 blur (just to finish blending in)
Flatten image, Layer>Flatten Image

[nickkarvounis]

What I did was also simple. As I noticed that the two images where very similar and that there where no position changes between the individuals I simply did this. I Opened both images on photoshop. Selected one of the images ctrl+a and clicked on the other image and pasted it ctrl +v. Then I went to the top layer one and erased everything expect from the guys head with the eraser tool. Having the blending opacity to 100%, then I simply flattened the image and voila.
I hope this sounded simple.
http://www.zshare.net/image/576793466d26b554/

[Roset]

Thankyou so much to both of you. very helpful. xx