virtual tour example

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Step B -- Stitch the upper row

In this step, you stitch the upper row of images into a 360 degree panorama that is parallel to the central row.  If all goes well, this upper row will match the spherical coordinate system of the central row.

  1. Choose the Show imported images command (View menu) to display the imported thumbnails in the lower pane.

  2. Select the thumbnails for the upper row and choose the Stitch with the Wizard command (New image menu).

  3. This time, remove the checkmark from Automatically detect focal length and then choose I am certain of the focal length on Wizard 3/9. This guarantees all rows are stitched with the same focal length setting (the first stitch sets the Wizard value to the detected focal length).

  4. Advance to Wizard 6/9 and place stitching points on one image pair as you did for the first row.  As before, I recommend this procedure for placing stitching points:

    • Place stitching points on one image pair. I recommend using distant points and/or points all in the same plane.

    • After placing 5 points, you should get a dot in the Images list.

    • Once you have the image dot, go back to each stitching point in turn and examine them at large zoom scale (400% or 500%).  Adjust the stitching points so that they match well on the two images.

    • It is probably sufficient to place stitching points on just one image pair because you are using Semi-automatic photo stitching.

    The warped images will have a sort of mushroom shape, much wider on the top than the bottom.  This is normal.  The degree of mushrooming will depend upon the tilt angle you used for the upper row.

    (When you stitch the lower row, the images will mushroom downward rather than upward.)

  5. Advance to Wizard 7/9.

    Examine the preview image to be sure the stitch is accurate.  If it is not accurate, return to Wizard 6/9 to adjust stitching points or add new stitching points to other image pairs.

  6. In our example, The Panorama Factory was not able to automatically determine the correct alignment for two image pairs, 3:4 and 4:5, because of the large blank sky regions.  So we will return to the previous Wizard step and set stitching points on those image pairs.  When you are just trying to force image alignment, it's usually enough to place a single pair of stitching points.

  7. After adjusting the stitching points, advance to Wizard 7/9.  Examine the preview image to be sure the stitch is accurate.

  8. In our example, the extra stitching points have taken care of the problem, so we advance to Wizard 9/9 to complete the stitch and click Done to exit the Wizard.  At this point, you should have two stitched thumbnails and two cropped thumbnails in the upper pane and the second cropped image in the lower pane.

Advance to Step C -- Stitch the lower row

Back to Step A -- Stitch the central row

Up to The list of the major steps

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Revised: January 31, 2006

 1999-2006 Smoky City Design, LLC and John Strait