Loaded Image Doesn't Retain Separate Colors

I have an image of a map loaded in MATLAB.

BEFORE the map is loaded into MATLAB the appearance is:

US Continent: Green

Ocean: Blue

Canada: Yellow

AFTER I load the map it is displaying:

Canada and the US as one color BUT I need to separate them by colors.

My code is:

im = double(imread('US.png'))
figure;
colormap summer;
...

Thanks,

Amanda

Answer 1

[Walter Roberson]

Try

fig = figure;
ax = axes('Parent', fig);

[im, cmap] = imread('US.png');
if isempty(cmap)
  im = im2double(im);
  cmap = summer;
end
image(im, 'Parent', ax);
colormap(cmap);

[Amanda]

WOW -- it worked. Thanks a lot.

[Amanda]

Walter -- I really appreciate it. Only a few people are plotting and imaging experts.

[Image Analyst]

You're right, though it is the most used toolbox, according to the list at the left.