You can project a horizontal stripe pattern and take photos from a high-up and lower down viewpoint (the recommended approach). The object will need to be placed on the radial calibration mat (or using the domino targets which should be visible in all the photos.
Make sure the projected stripes cover the whole object and appear reasonably sharp and in focus
Take your photographs making sure that you have rotated the object to around 16 positions and have two (or more) images for each position. You will need to ensure that dots on the calibration target(s) are detectable in the photos - you may need to use a spot light to illuminate the mat. The projected pattern should be clearly visible and focused on the object — you may need to darken the room depending on your projector's power.
If you are using multiple cameras try to fire them off at
approximately the same time - so they have similar
timestamps. Alternatively you should rename the shots so that
the files taken at the same rotation have the same numerical
suffix (not including the file
extension). e.g. camera1_0001.jpg
and
camera2_0001.jpg
. See File Naming Convention.
TIP: |
If your camera positions are vertically spaced (i.e. the elevation angle changes but the object rotation is fixed) then this will be automatically detected so you won't need to rename the images. Make sure these shots are set to be the "stripes" image type and use the "...using trailing digits" (default) option. |
Start a new project and load in all your photos. If your files have not been named using the 3DSOM Pro naming convention you will need to manually identify the stripe shots. Select the thumbnails corresponding to the stripe shots and use menu item from the menu to identify these as stripe shots.
Mask all or some of the images that are easy to mask (taken without the projected pattern).
Build your initial wireframe model in the normal way using
the button.
Now build a point cloud by selecting the
button. Use the "...using trailing digits" default option if the images have
been named with the same numerical suffix or were taken with
vertically spaced cameras. Otherwise you can select either the
"...using timestamp" option if the images taken
from both cameras were taken simultaneously (or within a 0.5
seconds).
optimise your surface using the masks and point cloud using the button.
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