The technology that powers the Photomerge command can also be harnessed to stitch together vertical shots. The Auto-Align Layers command is a useful way to stitch together multiple shots or scans of a large object or a group photo. The command is very easy to use and produces impressive results.
- Choose File > Scripts > Load Files into Stack to combine two or more files into one document.
- In the Load Layers dialog box, click the Browse button to navigate to the files you need.
- Select multiple images from a folder, and click Open.
- In the Load Layers dialog box select the check box next to Attempt to Automatically Align Source Images.
- Click OK. Photoshop opens both images and aligns them, and does a good job (especially since the top layer was taken at such an angle). This alignment can be refined even further.
- Make sure all the layers are selected in the Layers panel.
- Choose Edit > Auto Align Layers.
- Select the Auto option to enable both Vignette Removal and Geometric Distortion options for Lens Correction.
- Click OK. Photoshop removes some of the distortion in the glass case, giving it a more rectangular shape.
- The layers can be seamlessly blended together using the Auto-Blend Layers command. This applies Layer Masks as needed to each layer to mask out exposure issues and create a seamless composite.
- Choose Edit > Auto-Blend Layers, specify the Panorama method, and click OK (be sure the Seamless Tones and Colors check box is also selected).
- Crop the image as needed, adjust Levels, and Flatten.