auto-save of figure

HI i want to save the snapshot figure by automatically taken by the laptop webcam .? i don't know how to do auto-save....

then i want to check the image taken by the webcam is blank(black) or a picture

[Jan]

The question is not clear. Please take the chance to edit the text and improve it. Thanks.

[suryakanth]

thank you :)

Answer 1

[Image Analyst]

rgbImage = getsnapshot(videoObject);
imwrite(rgbImage, fullFileName);
grayImage = rgb2gray(rgbImage);
meanGL = mean2(grayImage);
if meanGL < 20 % or whatever.
  warningMessage = sprintf('Something is wrong.\nThe image is too dark.\nThe mean intensity is only %.1f gray levels', meanGL);
  uiwait(warndlg(warningMessage));
end

[suryakanth]

thank you

[suryakanth]

this is my code

s1 = serial('COM3');

fopen(s1)

fprintf(s1, '*IDN?');

idn = fscanf(s1);

fclose(s1);

if idn == 'a'

vid = videoinput('winvideo',1);

src = getselectedsource(vid);

vid.FramesPerTrigger = 1;

preview(vid);

vid.ReturnedColorspace = 'rgb';

im1=getsnapshot(vid);

preview(vid);

closepreview(vid);

stop(vid);

e=imshow(im1);

else f = errordlg('The phone was not used', 'Recorded status'); end

imwrite(im1, fullFileName);

grayImage = rgb2gray(im1);

meanGL = meann2(grayImage);

if meanGL < 20 % or whatever.

warningMessage = sprintf('Something is wrong.\nThe image is too dark.\nThe

mean intensity is only %.1f gray levels', meanGL);

uiwait(warndlg(warningMessage));

end

this is my code ..but it give an error in the line of

inwrite(im1,fullFileName) ;

and in line of meann2(grayimage)

the error is

Undefined function 'meann2' for input arguments of type 'uint8'.

Error in InProcessing (line 21)

meanGL = meann2(grayImage);

------------------------------------------

Warning: Image is too big to fit on screen; displaying at 67%

> In imuitools\private\initSize at 72

In imshow at 259

In InProcessing at 16

Undefined function or variable 'fullFileName'.

Error in InProcessing (line 19)

imwrite(im1, fullFileName);

[Image Analyst]

Use mean2(grayImage) or mean(grayImage(:)) instead of meann2(). There is no meann2 - that was a typo of mine. And of course you need to create a filename. Use sprintf() and fullfile() to do that.