Apple QuickTime VR Bedienungsanleitung PDF herunterladen (Seite 89)

Media-specific problems

Panoramas

I see something that looks like stair steps at the top and bottom of the

panorama.

Cause: The camera was not level when you captured your images.

Solution 1: To work with images that were captured with an off-level camera, you may need

to rotate the images to the approximate angle at the time of capture. Try to make the horizon

in the panorama images a level line from one image to the next, rather than an upward or

downward slope. If the sequence steps upward, try stitching the images with a clockwise

rotation angle of 1 degree. If the sequence steps downward, try rotating the images 1 degree

counterclockwise. Try different values until the stepping is eliminated.

Solution 2: Use the Pair Alignment feature of the Panorama Stitcher tool. See Chapter 4 for

instructions on how to align images when stitching a panorama.

The panorama looks distorted, or the pixels look abnormally large or small in

either height or width.

Cause: You did not correctly calculate the vertical angle of view.

Solution: Use the lens calculator to figure the vertical angle of view and redo the stitching

process. For more information, see “Adding a Lens” in Chapter 4.

I see rectangular bands at regular intervals in the panorama.

Cause: You didn’t take your images with enough overlap between them, and the lighting or

exposure was uneven from frame to frame.

Solution 1: Select Blend in the Image tab in the Stitch Settings window, then restitch

the panorama.

Solution 2: Reshoot the source material with 50 percent overlap. Use a light meter and

supplemental lighting to correct for frame-to-frame differences in lighting.

Solution 3: Tu rn off auto exposure. Select a manual setting based on the average meter

reading for the scene.

Tips and Troubleshooting 89

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Apple QuickTime VR Bedienungsanleitung Seite 89