Instruction Manual Roundshot VR Drive - version 4.0 – January 2010 - © by Seitz Phototechnik AG / Switzerland www.roundshot.ch
page 15
2.2 Cylindrical and spherical panoramas & number of images (continued)
2.2.3 Number of images to create the panorama (continued)
The above results are estimates / guidelines.
The calculations are optimised for
minimum
amount of images required. The focal length (on a zoom lens) can vary
slightly and digital sensors have slightly different dimensions. Also, different stitching
programs have distinctive algorithms for the point detection and rendering/blending
of the panorama. For entirely uniform surfaces (for example a white wall) there may be
no automatic detection points and manual stitching may be required. Test your
camera/lens combination and the success of the stitching carefully for spherical
panoramas.
The VR Head
tilt lever
has convenient
click-stops
up- and downward at
15°, 30°, 45°,
60°, 75° and 90°
. When tilting at 30° the image-taking and stitching workflow is
optimised, as this requires least images for the stitching. Of course it is also possible to
tilt at an intermediate angle. The exact tilt degrees can be read off the tilt scale.
For focal lengths > 24mm it is necessary to create several rows and tilt the camera
several times up and downward. To compute the correct tilting, numbers of columns
and rows for high resolution spherical and
gigapixel multi-row panoramas
, we
recommend to use the
Panorama Calculator
software by
panorama factory
(
www.panorama-factory.ch
). This calculator is able to calculate up to 10 rows for
spherical and up to 21 rows for gigapixel multi-row panoramas. Depending on the
focal length used a multiple of columns controlled by the VR Drive are possible.
