How to get a position (index(j)) of a loaded image?

Hi,

I am new here and I need an advice. How can I get a position of the loaded image among other pictures in folder (number of index(j))?

I know how to load all images from folder - dir(). I also know how to calculate the number of pictures in a folder - N=lenght(). But now I would like to load/select the image from the folder, that will be the first in my for cycle (because for example the first 5 images are blurry - I want to start with image number 6=j, but this number is constantly changing and I do not want to change this number manually but by selecting the image).

It will looks like: for i= j:N ....

Sorry for my bad english.

I will be grateful for any help you can provide.

[Walter Roberson]

How would you like to select the image ? by name ? by displaying them all and having the user click on one ? by number ?

[levpa levpa]

By displaying all of them and having the user click on one. My idea was something like:

I(j)=imread(uigetfile()) ..... (But I guess this way how to find index (j) is not correct)

[levpa levpa]

Does anyone have any idea ? :-(

[Jan]

I do not understand the question. Please rephrase it and post a tiny example.

[levpa levpa]

%% I want to start for cycle for example with image number 4 from folder (In this case j=4). So I want to select one image and then I want to know the position/index of this image in folder. 
clc; clear all ; close all;

d = uigetdir ;
all=dir(fullfile(d,'*.jpg'));
N = length(all) ;     
R(j)=imread(uigetfile(d))     % How to get (j) index?? --------------------- HELP

for i = j:N
    I = fullfile(d,all(i).name) ;   
 a=imread(I);
 
    figure(1)
    imshow(a);
    pause(0.5);
    %etc.....

end
close all

[Geoff Hayes]

levpa - what can you tell us about the naming convention of the files in the folder? Are they named the same with the exception of an integer (like image123.png, image123.png)? Or can they have different names? Can we assume the images are in aplhabetical order?

[levpa levpa]

Every image has a specific name. This name tells the temperature that is captured. (like 105.jpg,110.jpg,140.jpg,145.jpg...).

[Geoff Hayes]

so if you start the cycle at 110 then you expect to load image 110.jpg, then 140.jpg, then 145.jpg, etc.?

[levpa levpa]

Yes. I want to load all the pictures except the first five (for example five, in another folder it can be the first three images etc). So in this case will "for cycle " start with number 6(=j which I am looking for)

Answer 1

[Image Analyst]

You said "By displaying all of them and having the user click...."

Just list all your images in a listbox and have the user select whatever ones they want. See MAGIC

[Kalyan Seelam]

what if the list of images saved as temp.jpg,temp(2).jpg etc.,

[Image Analyst]

That's fine. Just build up a cell array of filenames and send it to a listbox.

files = dir('temp*.jpg')
allFileNames = {files.name}
handles.listbox1.String = allFileNames;

If you want, you can examine each filename and parse it first for certain characters to see if you want to add it to the list or not.