2D X-RAY CT SCANNED IMAGES
As I mentionned briefly in my introduction, the data for my visualization
came from two dimensional X-Ray CT (Computerized Tomography) scanned images.
The images were initially placed on transparencies of twelve to
a page. As a result, the visualization of the egg is not exactly true to
life. Such an image can, however, be generated if instead the actual data
from the CT scanner was used.
BLACK AND WHITE PHOTOGRAPHS
The next step involved transferring the images fromt the transparencies
onto Kodak paper, which would be more easily read by the scanner.
After transferring them, still twelve to a page, I
cut them apart as precisely as possible. Despite my best efforts to be
accurate, there is an automatic degree of error added when anything is
done by hand.
I then scanned the images and within DX (Data Explorer)
created a program that allowed me to move each image individually. The
scanning had caused some images to be rotated a bit and they were not yet
correctly aligned. Each image was then ligned up according to lettering at its
corners (Image information from the CT scan).
3D DATA SET
Once aligned, I wrote the images to a 3D data set, placing
them along the x-axis (perpendicularly) with the correct spacing
in between (like a deck of cards on a skewer...).
In order to create a three dimensional surface, I had to first resolve
a number of problems that arose as a result of the differences in brightness between
the images. I did a great deal of
imaging to correct
the inconsistencies in the data. The end result was a smoother surface in the
visualization of the entire egg and in that of the shell and bone alone.
I created a number of different
visualizations of the data, starting with the
entire egg, then the shell and bone, and finally only
the egg's contents.
DISCLAIMER: I am using the word 'bone' loosely here, because even
in the final visualization, I cannot be certain that there is any bone matter within
the egg. In a very tedious and messy
I have also included in the section on visualization, a trip through the egg (a pan
through the egg) in the x, y, and z directions based upon the original data. These visualizations
make clearer some of the problems I encountered during the
image processing stage of my project.
DINO HOME PAGE
HISTORY OF THE PROJECT