Ewout van Bekkum Chris Gurley Suha Kayum Nate Klein

Ewout van BekkumChris GurleySuha Kayum

Nate Klein

Brief Summary

Purpose of project• Automated Gigapixel Panorama Acquisition• Create a platform to

• Adjust the camera’s direction for every picture• Take the photograph automatically• Make the photographs available via FTP

Design ChangesPan-tilt Tripod Head

• OEM instead of custom design• Center of rotation not at the nodal point

• parallax error

Control camera movement with no feedback• Control position based on rotational velocity and time

• Positional error due to non-linear velocity

Relay box to control movement and shutter• Modified OEM switch box to be triggered by relays• Custom switch created to control shutter

Hardware Used

• ICOP Technology eBox-2300• Xenarc 705TSV Touchscreen LCD• PhidgetTextLCD• Custom Relay Box• Nikon D80 dSLR with modified

wired remote shutter release• Outdoor Pan Tilt Drive unit w/

Controller CCTV-75AV

Hardware Used




Hardware Used




Hardware Used




Hardware Used




Hardware Used




Hardware Used




Hardware Used




Hardware Implementation

• The user uses the Touch Screen as the main interface

• The touch screen is connected to the eBox via VGA and USB


• The software controls the digital outputs on the PhidgetsTextLCD

• PhidgetsTextLCD is connected to the eBox via USB


• Relay Control Box• 4 micromini relays and 1 faster reed relay for the shutter• Each relay channel is wired as seen below:


• In the relay control box, digital output channels:

• 1 - 4 trigger movement relays

• 0 triggers the reed relay for the shutter release

• The relay control box is powered via USB


• The relays simulate the movement buttons on the pan/tilt controller and the shutter release on the wired shutter release

• This way we can control the shutter release and movement of the platform

Software Used

• Visual Studio 2005• Development• Testing• Windows Embedded CE

• SphereFTP• FTP Server for Windows CE• Share Camera as Flash Drive

• Custom user interface• Set Camera and Lens parameters• Define Bounds and Direction of Panorama• Display approximate field of view and gigapixels of the

panorama and number of images required

Software Used





Software Used





Software Implementation

• Custom Windows CE 6.0 Build• WiFi integrated• PhidgetsKit drivers included• On startup starts the interface

and FTP server


• SphereFTP• Runs as an NT Serivice in the

background• Our custom C# interface starts as a

fullscreen GUI


• GUI starts and allows entry for:• Camera and Lens Parameters• The amount of overlap between

images


• On startup and when the parameters are changed, the following are calculated:

• Vertical and Horizontal field of view and megapixels per image

• Degrees required between images


• The directional movement buttons can now be used to move to the bottom right of the panorama

• To start a movement a digital out on the Phidget board is driven high• To stop it’s pulled down


• Once the platform is pointing the camera to the bottom right of the panorama the user clicks the “Set End” to confirm the location


• Now the platform is set so it can only move left and up• The user can now move the platform to the top left corner of the

panorama


• When the movement in either direction stops the following are calculated by multiplying the time the relay was open by the platform’s speed in that direction:

• The Panorama’s horizontal and vertical Field of View• Shots per row and column and the total shots• Approximate resulting gigapixels


• When the platform is located at the top left, the user clicks Set Start

• The start button becomes enabled• all movement is disabled


• Start is pressed• The algorithm moves the platform: left to right, down, right

to left, down, etc.


• Start is pressed• The algorithm calculates how long the relays have to be

open by dividing the degrees movement needed by the platform’s speed in that direction


• Start is pressed• Waits at each location for the exposure period times the

amount of exposures required


• Finished• The user can now return to the initial

screen by pressing reset• All the images are now also available via

FTP to be stitched on another computer

Results

• Several panoramas were taken• Most are too large to view with a normal image viewer

or browser• They can be viewed with Zoomify on our website

Results

• To show the level of detail, here is a sample panorama...

Results


Results


Results

For more… www.ewoutvb.com/4180/

Documents

Ewout van Bekkum Chris Gurley Suha Kayum Nate Klein