Connecting Cameras to Decapod
When setting up Decapod, the left camera must be attached to the Decapod system first, then the right camera. Doing this out of order may cause stereo capture and subsequent dewarping to not perform properly.
Currently, Decapod requires that the left camera captures first then the right camera. To ensure that this is done properly, follow the these steps:
Turn on the left camera.
Remove any memory cards if present.
Connect the left camera to the Decapod system with a USB cable.
Repeat steps 1 to 3 for the right camera.
If any camera is disconnected during capture, both cameras should be disconnected and reconnected in the manner stated above (left camera first, then right camera). If this is done in reverse order, stereo 3D dewarp may not perform properly.
Page Seperator and Background Colour
Stereo 3D capture in Decapod requires a solid coloured background, and an object to serve as a page seperator.
The background is recommended to be a bright green or bright blue, similar to the characteristics of ChromaKey blue and ChromaKey green. ChomaKey blue has an RGB value (0 0 256), and ChromaKey green has RGB value (0 256 0). When positioning the book on the background, it is recommended that some background is visible by both cameras.
The page seperator is placed in the centre spine (or "gutter") of the book while it is photographed. The page seperator can be a string, a drinking straw, or a pipe cleaner, and must be a solid colour different than the background colour and the colours in the book. Bright red is a good colour if the background is blue or green.
An open book on a green background. Down the middle gutter / spine of the open book is a red string which acts as a page seperator.A solid background and a page seperator is required during stereo 3D capture.
Running Stereo Capture
Using the Firefox web browser, load Decapod by entering the Capture web address into the location bar. By default the address is: http://localhost:8081.
If the Decapod server can not be loaded at the default address, or if the server is not running, please see your Decapod administrator for assistance.
When the Decapod Capture interface loads, the attached cameras are checked to ensure they will function properly (you may hear the cameras take pictures at this time). If the cameras are matching and supported by the system, then you will receive a message stating that capture is ready and that stereo 3D capture is available.
Before capturing in stereo, it is recommended that Stereo 3D Calibration be run. Without the calibration information, dewarping the stereo 3D images will not be possible.
When all capturing is complete, the stereo images can be saved by selecting the “Download Captures” button. After a short delay, there will be a prompt to download and save the archive containing all the captured images.
To dewarp stereo images, the camera positions used for Stereo Capture need to be recorded and its calibration information generated. To do this, it is recommended that Decapod’s Stereo 3D Calibration tool be run before doing stereo capture work.
For more information about stereo 3D calibration, see the Help documentation in the Decapod Stereo 3D Calibration tool, or the Decapod wiki.
Filename convention (Untethered capture only)