DeltaSphere-3000 3D Scene Digitizer
3
9/23/05
III
Capturing Color with the DeltaSphere-3000
Your system is set up, you’ve created a ‘scene’, and you’ve scanned for range from a particular location. Do not move the
tripod between range and image scans. Do not move objects in the scene.
1.
Lower the geared column on the tripod 8”.
2.
Lock the tripod’s geared column screw and check that quick-release base is tightly screwed to tripod
3.
Aim the camera downward, level, or upward.
o
For many scans you’ll want to capture 2 sets of photos, one with the camera facing down and the other with it facing up,
which covers the entire laser scan. In some cases you may only need to take a set of pictures at the middle, or level, setting.
4.
Check the camera’s focus so that the infinity symbol is centered on the 4.
5.
If you’re not connected to the camera, select the photo
Connect
button. If it doesn’t connect, check the 1394 cable and card, turn the camera
off and on, and try it again.
6.
Use the pan controls to rotate the DeltaSphere so that it is pointing where scanned.
7.
Set the overlap to 20%.
8.
Take a preview shot. Select
Settings
to open camera settings window.
o
Adjust white balance. (Do not use
Auto
.) Adjust shutter speed. Preview.
o
Repeat until you’re happy with the results.
o
If it’s very dark you may need to increase the ISO, though this will increase the ‘noise’ in the photos.
9.
Set the image compression and resolution. We recommend the 6 Mpixel (3024x2016,) and ‘Fine JPEG’ – the defaults.
10.
Select the
Auto Acq.
tab and select
Start
underneath it. This will open a new window.
o
Choose a name for the photos. (Typically this the same name as the laser scan, but change as needed.)
o
Choose Hi, Mid or Low to correspond to the angle of the camera in the bracket. (This will be added to the photos’ names.)
o
Set bracketing off or on and amount. We recommend always bracketing and using
1.0
(1 full f stop higher and lower). This
will take 3 photos at each location.
11.
Clear the area and select Start. Do not let people walk through the photos. The camera moves slowly to each position.
12.
Change the camera position (hi, mid, or low) if desired (without moving the tripod).
o
Repeat the preview and adjust the shutter speed if necessary.
13.
Repeat steps 10 and 11.
14.
Save the scene. Move the tripod to its next location.
Close-up Photos
•
Take close up photos of key elements of a scene with the calibrated camera. These are used for high-resolution insets and photo
hotspots. You can do this at any time – at the beginning, after 1 scan, or at the end.
o
If doing it at the end, try this. Remove the camera from the DeltaSphere, remove the camera mount from the DeltaSphere,
put the DeltaSphere away, place the camera directly on the tripod – preferably with a ‘pan/tilt’ head. Reconnect it to the
laptop. Now it is easy to move the tripod and use the Manual Acquire controls.
o
Do a preview and adjust the settings as you did above.
Note: REMEMBER TO ADJUST THE WHITE BALANCE ON THE CAMERA BODY. Select the function button
on the back of the camera. Then push the WB (white balance) button until you get the setting you want. It will often
be the same setting you used for auto acquire.
o
Choose
Man Acq.
You’ll be prompted for a file name and a directory. Use the default name or choose your own. The
program will number the photos consecutively.
o
Take a photo by selecting
Take Pict
or by pushing the shutter release.
•
You can also hold the camera by hand, but keep it cabled to the laptop, and use the Manual Acquire controls.
•
Alternatively, use the camera without the laptop. For this you will need a memory card. Remember to adjust the settings on the
camera. Later, transfer the images to your computer and insert them into the scene.
•
Take lots of pictures; disk space is cheap.
