MATLAB - image file types and reading them

[Despairy]

Hi , just started programming in MATLAB and I have a question.

Image files can be written as RGB/GRAYSCALE/INDEXED and more types,
from what I saw in MATLAB you can read an image by using imread() function
the only difference is what it returns.

[img,MAP] or img
how do I know which one I have to use for each image?

I do know about the imfinfo function and how to get the ColorType

so it's more of an Image question than MATLAB.

thanks,
Despairy

[Despairy]

this is what i have so far

if (strcmp(type,'indexed'))
        [x,MAP]=imread(imgFile);
        img=ind2gray(x,MAP); 
    else
        img=imread(imgFile); %reads the image
        if (strcmp(type,'truecolor'))
            img=rgb2gray(imgGet); 
        end
end

its all inside a try/catch function
and it wont throw anything , so i guess its good, but is it enough?

another thing if i load a jpg image i get another image from the same folder
any explanation? O_o

thanks again

edit: the other thing thing... was my mistake for declaring a global variable , it mixed up things, so only the first question remains

EDIT : having a problem reading TIF images , [x,MAP] & img wont read it appropriately

[Taywin]

Not so sure what you want to do. Anyway, have you read this Matlab page about reading image? It also talks about tiff image format as well.