Automatic Photomerge - Adobe Photoshop

Photoshop has a nifty function that speeds the process of stitching pictures: Automatic Photomerge. If the images have enough overlap and the exposures are not too far off, this function does a pretty good job on getting you started. In this section you join two pictures using Automatic Photomerge.

  1. Open AURocks1.tga and AURocks2.tga. You can see the shots in Figures .
  2. This picture was taken from the same spot as that in Figure below this figure , with the same exposure and seconds after, but the colors and alignment are off.

    Same shot, same time, but again—the colors and alignment are off in this photo.

  3. Go to File > Automate > Photomerge, as shown in Figure 3.
  4. Although you could manually do this, photomerge is a nice feature that speeds your progress.

  5. If you see any files you don’t want included, highlight them and click Remove. That takes them off the photomerge list but keeps them open in Photoshop.
  6. Images taken off the list are not closed in Photoshop

  7. Click OK. You should see the Photomerge palette, with joined previews of the two images. Figure shows the merge.
  8. The Photomerge palette has its own tools on the upper left

  9. Set Settings to Perspective. You see the status in the dialog box below the work area. Then Photoshop adjusts the perspective to better align the pictures.
  10. Click Keep As Layers. If it looks like the images are not quite lined up, manually tweak it by selecting the hollow arrow (Select Image tool) and moving the image until the steeples align to your liking.
  11. Check your settings to those of Figure , then when you are ready, click OK.
  12. Double-check your settings against this image to make sure you haven’t missed anything.

  13. Photoshop generates a new file for the photomerge. Notice that the colors don’t match up.
  14. Since you kept the layers, select Australia 1’s layer and then switch over to the Channels tab in the same palette as your layers and paths. Figure shows the results of this step.
  15. Make sure you have Australia 1 layer selected before you click the Channels tab. Otherwise, the following steps give you a slightly different result.

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