save snapshot image in a variable within a loop!!

7 views (last 30 days)
please need help in this why the data(i) variable in while loop give me an error here I want to take a picture after each 5 second and I need it continuous so I used while(1) ...
vid = videoinput('winvideo',1);
set(vid, 'FramesPerTrigger', Inf);
set(vid, 'ReturnedColorspace', 'rgb');
i = 0;
data(i) = getsnapshot(vid);
  1 Comment
Jan on 4 Apr 2017
You mention an error. Then please post the message. It is easier to suggest an improvement than to guess the problem.

Sign in to comment.

Accepted Answer

Image Analyst
Image Analyst on 4 Apr 2017
Get rid of the (i) and have just data, or better yet, a more descriptive filename:
for f = 1 : 1000 % view and save 1000 frames then quit.
thisFrame = getsnapshot(vid);
baseFileName = sprintf('Frame %3.3d.png', f);
fullFileName = fullfile(folder, baseFileName);
imwrite(thisFrame, fullFileName);

More Answers (1)

Joseph Cheng
Joseph Cheng on 4 Apr 2017
Edited: Joseph Cheng on 4 Apr 2017
from what i see get snapshot returns a NxMx(1 for mono 3 for color) and you're trying to stuff it into a 1x1. what you should try is i=1 for start as data(0) isn't how matlab works. and put data as data(:,:,i) for monochrome as you'll be putting a NxM into data's NxMx1 indexes. change the data() into a cell array if you want to store it as an rgb image.

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!