Double Exposures

Superimpose: To lay an image (or part of one) on another image.

Double Expose: To merge/blend two images into one.

Creating a “double exposed” image in Photoshop is easier than you might think and can provide you with interesting results. The technique is most commonly used for creating an artistic look. However, it is becoming a popular method for creating a unique ambiance in traditional, straight forward images, when multiple shots of the same image are layered upon each other.

1. First, pick out two images you want to merge together and open them both in Photoshop.
2. Keep the relative image sizes in mind and choose which image will be the “foundation”/bottom layer.
3. Next, press Ctrl + A (command +A for Mac) to quickly select the entirety of the “top image” you wish to be blended over the “foundation image”.
4. Copy that selection and paste it right over your “foundation image”. It will look as if the “foundation image” has disappeared and you will be looking at two windows which should each present that “top image”.
5. Making sure that window in which you just pasted is active, look at your layers in the bottom left corner. Notice that your original image is still there by closing the eye of your latest layer. (Just left click on the eye box.) Before continuing, re-open the eye.
6. At the top of your layers box, on the right side, you will find the “Opacity” controller. If you slide the control down to 50% you will find your two images equally blended together. You can play with this to determine what looks best in your opinion.
7. Make sure to “Flatten” at this point, because you will likely need to do some fine tuning work. (Layer – Flatten Image)
8. I recommend fine tuning with the Burn and Dodge tools, as well as adjusting the Exposure levels. These tools can improve contrast which often gets lost by merging different tones and lighting together.

For examples of this technique and a bit more on the topic, I recommend you check out “Double Exposure Tips and Photos” by Brian Auer.  http://double-exposure-tips-and-photos/