Oscar, Mara & Anita ELEC539 Proj2

Ideas
1. Look for edges.  Find second edges which are within a certain range from
the first.

2. Find pix vals in a certain range (the expected tank pix value).  Look at
neighbors to see if they are also in the range.  Do filtering or a simple
pix value comparison.

3. Dilate and erode the original image to take out some of the other stuff.

4. Edge detection.  Find end point of prospective tank edges.  Convolve or
something.

5. Binary image.  bwselect for all white objects.  then do bwarea to get
area.  see which has approx the right area.

Look for horiz and vert lines betwen edges.  Find two opposite corners.
See how far up and over they are.  Possible use of longest line ideas?
It might not be the length of the diagonal (depending on the angle), but
the longest local lines will correspond to corners (with equal length
between corners).  This will give us the angle of the tank (could be off by
pi).

Now that we know how the tank is oriented, we can do simple edge
detection to find the barrel, thus eliminating our angle uncertainty.


applylut
bwarea
bwperim
bwfill
bwselect
edge
im2bw
imrotate