This page has all new content as of friday, november 16

On Tuesday November 14, we took a series of photos of the large yellow 
Lego brick. From these photos, angle + distance data was generated, 
and is stored in the following two files:



camera0-revision2.pickle


camera1-revision2.pickle




NOTE: These are slightly different from the previous version of the
pickled data format.  This also now requires that you have the
fabscan.py code in order to read in the data.

To read in the data, use the following procedure in python:

>>> import cPickle
>>> from fabscan import *
>>> file = open('camera0-revision2.pickle','r')
>>> sceneObject = cPickle.load(file)
>>> file.close()
>>> 
The variable sceneObject.partViews[0].part.partData is now an MxN array, where M is the
number of discrete z values (heights) in the part, and N is the number
of angles for which we have data.
The variable sceneObject.partViews[0].part.partAngles is a vector of length N, containing
the list of angles (in degerees) that correspond to the data in the
sceneObject.partViews[0].part.partData matrix.


All the python files used to generate this are available 
in the code directory.

Python modules Tkinter, numpy and scipy are all required.

In order to take advantage of the 3D visualization, you'll need
VTK installed, but the rest of the code should be functional even 
if you don't have the prerequisites for the visualization portion.

On windows, the Enthought python distribution comes with all
the prerequisites, including vtk, so if you use it, you should have 
everything you need.



Here are some images generated directly from the data. 

The first three images come from camera1 (Yannick's camera).
Notice that there's a small gap cutting horizontally across the object
about two-thirds of the way down from the top. This is actually where
the object ends. Everything below that is reflection off the surface
of the turntable:













The next three images are based on data from the webcam. These lack 
the turntable reflection (this probably results from a property of 
our setup, like the angle of the camera, rather than being caused
by some property of the camera itself).