representation of many curves

hi i have 25 images i want to select 6 pixels and follow each point during the 25 images then represent 6 curves in one axis i hope that u get me

any help ?

[Walter Roberson]

See https://www.mathworks.com/matlabcentral/answers/804461-courbe-de-suivie-des-pixels-dans-les-images?s_tid=srchtitle

[cyrine tijani]

that code gives me 25 curves while i need 6 curves of 6 pixels in 25 images

[Walter Roberson]

It is the same requirement, and the same discussion. We are working through it with the person there.

Answer 1

[KALYAN ACHARJYA]

Snippet:

% Images Folder Directory
% Call the images one by one, there are multiple simmilar question, please check
% Load any one image and get the size
imgae_data=rgb2gray(imread(image_file)); %Considering Gray Image
[r,c]=size(image_data);
%To select six pixels can be done in two ways 
%One approach using randi function
x=randi([1,r],[1,6]);
y=randi([1,c],[1,6]);
% 2nd Approach using pixelinfo
% Now call the 25 images one by one
pix_data=cell(25,i);
for i=1:25
%Read 1st images
% Get the 6 pixels values using x,y
image_data=image1; %when i=1
% Get the pixel form the image at x,y
pix_data{i,1}=  % array with 6 pixels value
end 

Once done, pix_data is a cell array with 25 elements and individual cell elements having 6 pixels value

pix_data=cell2mat(pix_data);

See pix_data details

>> whos pix_data
  Name           Size            Bytes  Class     Attributes
  pix_data      25x6              1200  double   

Next plot the pix_data with individual column wise, you will get 6 curves.