How to read and add 100 consecutive images

I need to be able to read and add 100 consecutive images with Imread. I have about 19000 images, so I will need to use a for loop. I need to read 100 consecutive images, and repeat the process for all images.

I was working with this code. I don't know how to change the formatting so I can read 100 images, since so far I was just taking the last two images of the start image, and adding 30 or 40 consecutive images. This code is an example of what I ussed to add (and average) 80 consecutive images that I selected randomly from my 19000 images.

%CHANGE THE FIRST IMAGE OF THE SEQUENCE HERE (my first image is 00001)
filename = 'test_16310.tif';
%number of consecutive images you want to average:
images=80;

I0 = imread(filename);
% original line of code: lastTwoDigits = str2double(filename(end-5:end-4));
lastTwoDigits = str2double(filename(end-5:end-4));
sumImage = im2double(I0); % Inialize to first image. The double function is used to convert
% the image data from the default integer data type to double-precision, which allows for more accurate arithmetic operations.
for i=(lastTwoDigits+1):(lastTwoDigits+images) % Read remaining images.
    TifImage = imread(['test_163',num2str(i),'.tif']);
    sumImage = sumImage + double(TifImage);
end
meanImage = sumImage / images;

[Walter Roberson]

TifImage = imread(['test_163',num2str(i),'.tif']);

num2str() does not emit leading 0 by default.

TifImage = imread(['test_163',num2str(i, '%02d'),'.tif']);

Answer 1

[Image Analyst]

See attached demo file where I do exactly that. Adapt as needed.