Primatte
Launch Photoshop.
Step1. From the menu, choose File, Open.
1.1. Navigate to the appropriate folder and choose the green screen image.
1.2. Click Open.
Step2. Now import the background image.We are using another image of the same size and resolution.
2.1. From the menu, choose File, Open.
2.2. Navigate to the appropriate folder and choose the background image.
2.3. Click Open.
Step3. Once the image opens, you may need to un-dock the image to be able to access both images at the same time.
Step4. Select the thumbnail of the background image in the layers palette.
Step4.1. Hold down the "shift" key on the keyboard, and drag and drop the thumbnail on the green screen image.This drops the background as a new layer onto the green screen image.
Step5. Close the background image file.
Step6. Now change the mode of the Green screen layer from "background" to normal.
Step6.1. To do this, double click the thumbnail in the layers palette.This brings up the layer naming panel.
Step6.2. Click OK to accept the default "Layer 0" name.The mode of the layer is now changed.
Step7. In the layers palette, hold and drag down the background layer thumbnail below the green screen layer.
Step8. Select the green screen layer to make it active.
Step9. From the menu choose Filter, Digital Anarchy, Primatte.The primatte interface comes up.Note that our image looks squeezed, but it actually fine- Primatte is just ignoring the pixel aspect ratio c...