HELP WHY IS THIS NOT WORKING? WHY HAS CODING FORSAKEN ME???? Error: Index must not exceed 5196 error? This occurs when I input a smaller image, why and how to fix?

My questions can be broken down like this:

1. I have a code that is meant to process the mask of multiple images then count the green dots in those images then graph the number of the green dots vs. region location (that is specified by 12 dividing strips across the image). Is my code accurately doing this?
2. When I added more images that I think were smaller I got the error in stripMaskImage = masksinusoid(:, col1 : col2); Index in position 2 exceeds array bounds. Index must not exceed 5196. How can I fix this error please? Thank you.

N.

Error: Why do I get the: Index in position 2 exceeds array bounds. Index must not exceed 5196 error

[John D'Errico]

The computer gods are always watching over you, keeping notes of who was good, who was bad... Oh. Wait. It is Santa Claus who does that. Anyway, I'm sure the computer gods keep track too. Next time, try kneeling in frong of your keyboard. Can't hurt.

[Neo]

@John D'Errico This is hilarious. Thanks it worked out pretty okay coincidently.

Answer 1

[Image Analyst]

In your (attached) m-file script, you call this line

startingColumns = round(linspace(1, columns+1, 13))

before you ever assigned columns. So of course it doesn't know what columns is (what value it has).

Go back to the working code I gave you in your earlier question, or put that line of code inside the for loop, not outside, so that it uses the columns value for the particular image of that iteration:

for m = 1 : numfiles
    fprintf('Processing file #%d of %d : "%s".\n', m, numfiles, allFileNames{m});
    MyRGBImage = allFileNames{m};
    % Read in image.
    imageData = imread(MyRGBImage);
    % Get the dimensions of the image.
    [rows, columns, numberOfColorChannels] = size(imageData)
    % NOW determine the starting and ending columns.
    startingColumns = round(linspace(1, columns+1, 13))
    endingColumns = startingColumns(2:end) - 1

[Neo]

@Image Analyst okay that did it! But my main question is, is it doing what i intended it to do? Which is process the mask of multiple images then count the once green dots now white (after applying the mask) in those images and graph the number of the green dots vs. region location (that is specified by 12 dividing strips across the image). Is my code accurately doing this?

[Image Analyst]

I think it should work but you need to create some "check sample" images where you draw rectangles of known size into the image so you can see if what you get out is what is really there.

[Neo]

Got it! I will do that