M = reshape(testim,[270*293,3]);
imshow(reshape(M(:,1),[270,293]))
intensity = reshape(M*[1/3;1/3;1/3],[270,293]);
uiopen
imshow(intensity)
intensity = sum(testim,3)/3;
imshow(intensity)
cd('p:\matlab\photostereo');

normal2image            normalscript            
normalgenerationscript  
normalize               
normalgenerationscript
ans =
    1.0000
   -5.7505
ans =
    1.0000
   -5.7505
ans =
         0
    2.9767
normalgenerationscript
ans =
    1.0000
   -5.7505
ans =
    1.0000
   -5.7505
ans =
         0
    2.9767
axis equal
hold on
hold off
pause
pause(2)
pause
more
more on
more off

PlotStereoResults  plotedit           plotpts            
plot               plotm              plotyy             
plot3              plotmatrix         
plotcorresponding  plotmeshnorms      
help plotmeshnorms

 % plotmeshnorms(meshnorms,scale,subsamp) plots mesh normals

help sum

 SUM Sum of elements.
    For vectors, SUM(X) is the sum of the elements of X. For
    matrices, SUM(X) is a row vector with the sum over each
    column. For N-D arrays, SUM(X) operates along the first
    non-singleton dimension.
 
    SUM(X,DIM) sums along the dimension DIM. 
 
    Example: If X = [0 1 2
                     3 4 5]
 
    then sum(X,1) is [3 5 7] and sum(X,2) is [ 3
                                              12];
 
    See also PROD, CUMSUM, DIFF.

 Overloaded methods
    help single/sum.m

spherescript
imshow(im)
spherescript
??? Subscript indices must either be real positive integers or logicals.

Error in ==> p:\matlab\photostereo\spherescript.m
On line 14  ==> albedos(r/2,:) = 0;

r
r =
   121
spherescript
diary off