error occured during selection of random images

Index exceeds matrix dimensions.

Error in tt (line 18)

fn = fullfile(P,D,F{ii});

clc;

clear all;

tic;

%% Training images

id_test = 0;

id_train = 0;

P = 'ROIBintrain'; % i.e. relative/absolute path to where the subfolders are.

for ii = 1:10 % no of classes

D = sprintf('%u',ii);

S = dir(fullfile(P,D,'*.bmp')); % get all filenames in subfolder

N = numel(S);

X = randperm(N);

F = {S(X(1:8)).name}; % randomly select 8 filenames.

for jj = 1:numel(F) % no of images per class

fn = fullfile(P,D,F{ii});

im = imread(fn);

X = double(im);

X = imresize(X,[100 120],'bilinear'); %300 250

id_train = id_train+1;

traindata{id_train}=ext_vein(X,1);

traindata = traindata';

% only four minutie is taken from one image

reduced_traindata = cellfun(@(M) M(1:min(end,4), :), traindata, 'uniform', 0);

end

end

%% Testing images

d=[];

P = 'ROIBintrain'; % i.e. relative/absolute path to where the subfolders are.

for ii = 1:10 % no of classes

D = sprintf('%u',ii);

S = dir(fullfile(P,D,'*.bmp')); % get all filenames in subfolder

N = numel(S);

X = randperm(N);

F = {S(X(1:8)).name}; % randomly select 8 filenames.

for jj = 1:numel(F) %no of images per class

fn = fullfile(P,D,F{ii});

im = imread(fn);

X = double(im);

X = imresize(X,[100 120],'bilinear'); %300 250

id_test = id_test+1;

testdata{id_test}=ext_vein(X,1);

testdata = testdata';

% only four minutie is taken from one image

reduced_testdata = cellfun(@(M) M(1:min(end,4), :), testdata, 'uniform', 0);

end

end

%%

save('db1.mat','reduced_testdata');

save('db2.mat','reduced_traindata');

toc

Answer 1

[KALYAN ACHARJYA]

Beacuse length of F / fullfile total images is less than 10, check and verify

[Balaji M. Sontakke]

No sir, there are 10 folders and each folder contains 8 images, firstly i given F = {S(X(1:5)).name}; and also checked woth 3,5 and 8 image numbers but error is same,

[KALYAN ACHARJYA]

Type numel(F) in the command window and see the value

[Balaji M. Sontakke]

>> numel(F)

ans =

8

[Balaji M. Sontakke]

what does this mean? reading random 8 images then why this error?

[KALYAN ACHARJYA]

In the initial for loop you have defined ii = 1:10, when ii reached to 9, how it gets the F{9}, its having length only 8, hence it shows the error in that line, change the ii to 8, may be it works (to test)

Error in tt (line 18)
fn = fullfile(P,D,F{ii});

[Balaji M. Sontakke]

no sir there is no effect. ii indicates 10 folders each folder having 8 images, i want 5 images randmly from each folder, this program read 5 images but stop with error why this so?