virtual tour example

home gallery product info downloads buy now support learn more search

Step F -- Assign panoramic properties to the rotated image

This step completes the stitched image by marking it as a panorama.  We have to be very careful here to compute and enter the correct values because this defines the panoramic coordinate system of the final image.  If the values are incorrect, subsequent perspective cropping and/or conversion to VR formats (QTVR, PTViewer, IVR) may produce less satisfactory results.

  1. Double-click the thumbnail of the final rotated image to make it the current image.  Actually, if you have not clicked anything on The Panorama Factory’s window, the final rotated image should already be the current image.

  2. Choose the Properties command (Image menu).  Write down the W and H values from Image size (pixels) in the Image properties dialog box.  We'll refer to these values as StepF_W and StepF_H.  In our example, these values are 5247 and 2285.  Click Cancel to close the Image properties dialog box.

  3. Choose the Panoramic properties command (Image menu).

  4. Select This is a panoramic image under Panoramic image.

  5. Compute the horizontal field of view:

    HFOV = StepF_W * StepA_HFOV / StepA_W

    Enter this value as HFOV under Horizontal field of view (degrees).  In our example, the value is:

    HFOV = 5247 * 86.327 / 5070
    HFOV = 89.341

  6. Hit the Tab key on your keyboard to complete the HFOV value.  This will cause The Panorama Factory to calculate the total vertical field of view and display it as VFOV under Vertical field of view (degrees).  Write this value down.  We'll refer to it as StepF_VFOV.  In our example, this value is 38.8898.

  7. The Panorama Factory assumes that the panorama is symmetric above and below the horizon, which is not usually true for this type of panorama.  So we have to correct the vertical field of view to be asymmetric.  Remove the checkmark from Vertically symmetric under Vertical field of view (degrees).  This will let us enter individual values values for the field of view above and below the horizon.

  8. Enter the StepAB_Below value as Below under Vertical field of view (degrees).  In our example, this value is 4.11288.

  9. Compute the field of view above the horizon:

    Above = StepF_VFOV - StepAB_Below

    Enter this value as Above under Vertical field of view (degrees).  In our example, the value is:

    Above = 38.8898 - 4.11288
    Above = 34.77692

  10. Hit the Tab key on your keyboard to complete the Above and Below values.  This will cause The Panorama Factory to recalculate the total horizontal and vertical fields of view from Above and Below.  These should be very close to the StepA_HFOV and StepF_VFOV values.  If they're very much different, recheck all of your calculations.

  11. Click OK.

Advance to Step G -- Crop the image

Back to Step E --Rotate the fully stitched image 90 degrees counter-clockwise

Up to The list of the major steps

top


Revised: January 31, 2006

© 1999-2006 Smoky City Design, LLC and John Strait