Scan_Capturing_public
Author: Peter Stierlen
(peter.stierlen@t-online.de)
History: 2009/12/02 (v1.00 beta): first public version
Download: Scan_Capturing_public.jar
Installation: Download Scan_Capturing_public.jar to the plugins
folder and restart Imagej. You must also have TWUSB
downloaded and saved in the same folder.
Description: This plugin
allows you to capture 3D-scan images. The plugin is
designed to work with USB-webcam like Quickcam 9000
but also need JMF installed. You also need a Velleman
USB board for the control of the laser and camera rotation unit (stepper
motors). The USB-board is also used to switch the laser on and off. Further on
the analog input of the board can be used to read the voltage of a
phototransistor which is used for auto referencing the laser zero-position at
the beginning of a measuring session.
Camera: Logitech® Quickcam Pro 9000
Controller: Velleman USB INTERFACE CARD VM110
Stepper control: Nantotec SMC11
To control the USB board via Java you need twusb from Thomas Wenzlaff
www.wenzlaff.de/twusb.html
Limitations: The captured images will have
640x480 VGA resolution. The following Scan_Calculator plugin need
the full image stack for the spacetime analysis
calculation. To handle the image data volume it is necessary to capture with
VGA resolution. Please keep in mind ... there are memory limitations in ImageJ and the calculation time of the 3D data will
increase with the number of voxels (
X-resolution x Y-resolution x stack-size). Although you can manually
minimize the number of calculated voxels by
definition of a rectangular ROI in through the image stack in the Scan_Calculator plugin
resolution will increase the number of voxels inside
the ROI.
Because of my limited spare
time and different other projects I can’t give any support for detailed
hardware information. Please start such a project only if you have experience
or an experienced friend knowing how to connect the components with the necessary
further resistors, diodes and photo transistors.