How to assign a numeric value to a picture file?

ok so im having a problem with converting a file to numeric value. i have used str2num and has given me no luck. what i want to do is basically make a picture file for example x.gif equal to 1. I have multiple .gif files and want to assign values to each .gif file. how would i do this? thanks.

Answer 1

[Image Analyst]

Jack, we're not sure what you want. So you read in your gif file

myGif = imread('x.gif');

Now you have all the pixels in the myGif array. So what do you want to do with that? Assign all the values to 1?

myGif(:) = 1;  % Assign all pixels a value of 1, erasing previous values.

Why would you want to do that???

To process a sequence of files, see the FAQ for code samples: http://matlab.wikia.com/wiki/FAQ#How_can_I_process_a_sequence_of_files.3F

[Image Analyst]

Jack, regarding your "Answer" how about this:

filenames = dir('*.gif')
for k = 1 : length(filenames)
  filenames(k).number = k;
end

Now every filename has a number associated with it. Of course it's just the same as the index so it's totally unnecessary, but it seems like that's what you want for some reason.

[Jack]

THANKS A LOT! I have used your first function using imread for the .gif file and using myGif=1 to assign 1 to the file. It works without the (:) so I don't see any multiple numbers. Easier than I thought as I was using imread to read all my .gif files but didn't want to do that for all my files so instead I used a directory function to read all the .gif files and helped me save a lot of time without doing imread for all files. But apparently, I have to use imread for each file now to assign a value as I cannot grab individual files from my directory function and assign values. Then again, it accomplishes what I want. Thanks again.

Answer 2

[Jack]

I have used the directory function to put all my .gif files into an array. I want to recall them and given them a value. For example my array is reading like this x=[x.gif; y.gif; etc.] A 1x15 array. I want to be able to make it so x.gif is equal to 1 if I recall it back. So I guess something like x=[1; 2; etc] where x.gif is now 1. I've tried doing x=str2num(1;2). I have a=x.gif and b=y.gif and when I add them a column numbers is shown. I want it so it would be 1+2=3 when I recall the .gif files and add or subtract them. Idk if its possible but thanks for the replies.

Answer 3

[Jack]

I will try what you guys have suggested. Thanks. And basically I have card files and want to assign the value they represent like ace is 1 or 11 and king is 10.