Rank: 175 based on 1122 downloads (last 30 days) and 8 files submitted
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David Tarkowski

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The MathWorks, Inc.
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42.30065, -71.34889

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Files Posted by David View all
Updated   File Tags Downloads
(last 30 days)
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28 May 2009 IMAQPLOT - Preview video data using callbacks Demonstration of previewing Image Acquisition Toolbox video using Handle Graphics and callbacks. Author: David Tarkowski graphics, handle, example, plot, image acquisition too..., application 123 4
  • 4.0
4.0 | 3 ratings
15 Jul 2004 Screenshot IMAQMOTION - Image acquisition motion detection A live image acquisition motion detection GUI. Author: David Tarkowski example, application, imaqmotion image acqu... 223 10
  • 4.23077
4.2 | 14 ratings
14 Jul 2004 Screenshot IMAQCALC - Image acquisition calculator An image acquisition calculator to calculate the expected acquisition rate. Author: David Tarkowski applications, image acquisition too..., example, application, frame, rate 95 0
21 Jun 2004 Screenshot Motion Detection with Image Acquisition Toolbox & Simulink Motion detection algorithm in Simulink using the Image Acquisition and Signal Processing Toolbox. Author: David Tarkowski applications, image acquisition, simulink, example, application, test 209 6
  • 3.875
3.9 | 8 ratings
14 Jun 2004 Screenshot Ghosting Demo GUI showing alpha blending of streamed image pairs. Author: David Tarkowski applications, example, image, application, gui, image acquistion 125 1
Comments and Ratings on David's Files View all
Updated File Comment by Comments Rating
31 Oct 2009 IMAQMOTION - Image acquisition motion detection A live image acquisition motion detection GUI. Author: David Tarkowski meun

i am using matlab version 7.5 ,i got this error when i run your code, is ter anything thing i ned to type to run it?
??? Error using ==> imaqmotion at 55
IMAQMOTION is unable to run properly.
Input argument "obj" is undefined

07 Sep 2009 IMAQMOTION - Image acquisition motion detection A live image acquisition motion detection GUI. Author: David Tarkowski kumar, susheel

respected sir
                  i am susheel and i student of IIIT allahabad , i am studing M.Tech (IT) , my final year thesis "real time face detection and face recognition " in Matlab

so i need help i am not getting how to do
so sir please help me i need code for my thesis

so please send me code "real time face detection and face recognition" in matlab

think you sir

18 Jun 2009 Line value GUI Analyze the intensity of an acquired image by line. Author: David Tarkowski Golik, Borys

Thank you for this great demo! It worked just out-of-the-box! However, stepping through your code I've noticed some things which could be optimized:

1. Checking for the input arguments (line 30f) will fail if you try to pass an invalid videoinput object, e.g. one being deleted by delete(obj) but which is still in your workspace. In my opinion it would be better to rewrite the error-condition as follows:

elseif ( (nargin == 1) && (~isa(obj, 'imaqdevice') || ~isvalid(obj)) )
% error handling
end

2. It worked better for me to use imshow instead of imscale function updating the image axes (line 311) since imshow seems to preserve the aspect ratio.

3. It might be a good idea to convert YCbCr color space to RGB before displaying it in line 311. This way the red line indicating the selected video line will remain red (without conversion its green) and the image will look naturally. I just put

data = ycbcr2rgb(data);

into the switch-statement beginning in line 276 into the 'ycbcr' case. Alternatively you can put this conversion into the switch-statement beginning in the line 239 or even reduce this two switch-statements into one since they both switching the same parameter. I didn't try this, but it should work.

However these are just small things without great impact on the functionality. So I'd like to thank you again for this clean and well documented demo!

18 Jun 2009 Line value GUI Analyze the intensity of an acquired image by line. Author: David Tarkowski Golik, Borys

11 Apr 2009 IMAQMOTION - Image acquisition motion detection A live image acquisition motion detection GUI. Author: David Tarkowski vikram

can some one help me debug this error..

Warning: File 'log.txt' not found.
> In motion_detection>togglebutton1_Callback at 96
  In gui_mainfcn at 75
  In motion_detection at 42
Warning: File 'film.avi' not found.
> In motion_detection>togglebutton1_Callback at 97
  In gui_mainfcn at 75
  In motion_detection at 42
Warning: File 'var.mat' not found.
> In motion_detection>togglebutton1_Callback at 98
  In gui_mainfcn at 75
  In motion_detection at 42

radio =

     1

??? Error using ==> videoinput.videoinput
There are no devices installed for the specified ADAPTORNAME. See IMAQHWINFO.

Error in ==> sad_algorithm at 17
vobj=videoinput('winvideo',2) %initializes a video object to connect to camera

Error in ==> motion_detection>togglebutton1_Callback at 101
    sad_algorithm

Error in ==> gui_mainfcn at 75
        feval(varargin{:});

Error in ==> motion_detection at 42
    gui_mainfcn(gui_State, varargin{:});

??? Error while evaluating uicontrol Callback.

Top Tags Applied by David
application, example, applications, image, gui
Files Tagged by David View all
Updated   File Tags Downloads
(last 30 days)
Comments Rating
28 May 2009 IMAQPLOT - Preview video data using callbacks Demonstration of previewing Image Acquisition Toolbox video using Handle Graphics and callbacks. Author: David Tarkowski graphics, handle, example, plot, image acquisition too..., application 123 4
  • 4.0
4.0 | 3 ratings
15 Jul 2004 Screenshot IMAQMOTION - Image acquisition motion detection A live image acquisition motion detection GUI. Author: David Tarkowski example, application, imaqmotion image acqu... 223 10
  • 4.23077
4.2 | 14 ratings
14 Jul 2004 Screenshot IMAQCALC - Image acquisition calculator An image acquisition calculator to calculate the expected acquisition rate. Author: David Tarkowski applications, image acquisition too..., example, application, frame, rate 95 0
21 Jun 2004 Screenshot Motion Detection with Image Acquisition Toolbox & Simulink Motion detection algorithm in Simulink using the Image Acquisition and Signal Processing Toolbox. Author: David Tarkowski applications, image acquisition, simulink, example, application, test 209 6
  • 3.875
3.9 | 8 ratings
14 Jun 2004 Screenshot Ghosting Demo GUI showing alpha blending of streamed image pairs. Author: David Tarkowski applications, example, image, application, gui, image acquistion 125 1
 

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