i have a capturing GUI, how do I save each image i capture in camera?

    this is the function button of capsave which get a snapshot of the camera then save the image.. how do i save the image every time I captured?

function capsave_Callback(hObject, eventdata, handles)
  % hObject    handle to capsave (see GCBO)
  % eventdata  reserved - to be defined in a future version of MATLAB
  % handles    structure with handles and user data (see GUIDATA)
  set(handles.ss,'string','start');
  load('pass_val_cam.mat', 'vid');
      wa = getsnapshot(vid);
      axes(handles.snap_shot);
      imshow(wa);
      newName = sprintf('.jpg');
    imwrite(wa,['FINALS\' newName,]);
      %disp(image_val);
  %    pause(ntrvl);
      clc;
  a

Answer 1

[Chandra Kurniawan]

Hi, John

Can you find opening fcn in your code?

Something like

function untitled1_OpeningFcn(hObject, eventdata, handles, varargin)

In the openingfcn you should write

handles.output = hObject;
handles.index = 0;
guidata(hObject, handles);

And in your capsave_Callback you should write

function capsave_Callback(hObject, eventdata, handles)
  handles.output = hObject;
  handles.index = handles.index + 1;
  set(handles.ss,'string','start');
  load('pass_val_cam.mat', 'vid');
  wa = getsnapshot(vid);
  axes(handles.snap_shot);
  imshow(wa);
  newName = strcat('picture',num2str(handles.index),'.jpg');
  imwrite(wa,['FINALS\' newName,]);
  guidata(hObject, handles);

Answer 2

[Walter Roberson]

http://matlab.wikia.com/wiki/FAQ#How_can_I_process_a_sequence_of_files.3F

Answer 3

[john john]

the image is not yet on the current folder... i already figure out imwrite to save the image but it keeps replacing the image everytime i click my capture image button...

what you think best solution for this?

[Walter Roberson]

Use the techniques shown in the link above to dynamically construct the file name to write to.

[john john]

sad to say i am getting errors =( would you like to construct one for me?

[Walter Roberson]

Near the top of your callback:

persistent imgnum

In the part of your callback where you construct newName:

imgnum = imgnum + 1;

newName = sprintf('snapshot%04d.jpg');

This will save in files named beginning with "snapshot" followed by a 4 digit number (with leading zeros), with ".jpg" extension.

[john john]

Undefined function or variable "imgnum". <--- this is my error.. how do u define the imgnum? is it the file directory?

[Walter Roberson]

The

persistent imgnum

defines imgnum.

There is a small bug in what I wrote, though: after the "persistent" command, add

if isempty(imgnum); imgnum = 0; end

(This is not a fix to imgnum not being defined; that is the job of the "persistent" that needs to be in your callback.)

Answer 4

[john john]

wow its perfect.. its fully working now..can i ask again sir? how do I insert the imresize function in matlab in order the image will be resize and it will be save in the folder..

which part of the code i am going 2 insert imresize?

[Chandra Kurniawan]

before line

imwrite(wa,['FINALS\' newName,]);

just write :

wa = imresize(wa,scale);

'scale' is scalar.

[john john]

Thanks For the answer.. I already figure that out sir hehehe but what you give also is really working well.. =)