Quick routine to plot RGB overlay of three images

plotRGB allows quick plotting of an overlay of three grayscale images

Description

plotRGB allows quick plotting of an overlay of three grayscale images with possible custom scaling of the R, G and B intensity ranges
grayscale ranges are normalized for RGB plot

• MATLAB release: MATLAB 7.0.4 (R14SP2)

[Jan Simon]

A short help text exists, but is not very descriptive. No H1-line. Year and author are mentioned. The automatic parsing of the help is impeded by using %% as comment chars. The source has no comments.
min(min(X)) would be a faster as min(X(:)), same for max. Pre-allocation of tempim is not needed.
Summary: It works, the function is useful, some improvements would be good.

[us]

...min(min(X)) would be a faster as min(X(:))...

not quite

% ic2/2*2.6ghz/2gb/winxp.sp3/r2009b
x=rand(1000);
tic;for i=1:1000;min(x(:));end;toc
% Elapsed time is 1.469955 seconds.
tic;for i=1:1000;min(min(x));end;toc
% Elapsed time is 1.491293 seconds.

for smaller xes, its even faster...
just a thought
us

[Jan Simon]

On a multi-core machine MIN(MIN(X)) seems to be faster than MIN(X(:)). On a single core (Matlab 2009a), MIN(X(:)) is 16% faster with the example of <us>. Follow <us> to be prepared for the future. Thanks <us>.