image1.jpg, image2.jpg.....etc how?

30 次查看（过去 30 天）
Lloyd
Lloyd 2013-9-11
I want to save images without overwriting them whenever I hit the pushbutton. Can you please help me how save images without overwriting the original? What I want to do is whenever I'll hit the pushbutton, It will generated 1 image at a time without deleting the original.
here's my simple code.
vid = videoinput('winvideo',1);
set(vid, 'ReturnedColorSpace', 'RGB');
img = getsnapshot(vid);
imshow(img);
imwrite(img,'C:\Users\Sony Vaio\Documents\Appendix\images\image.jpg');
thank you :)

请先登录，再回答此问题。

采纳的回答

Jeff E
Jeff E 2013-9-11
counter = 1; %initialize filename increment
vid = videoinput('winvideo',1);
set(vid, 'ReturnedColorSpace', 'RGB');
img = getsnapshot(vid);
imshow(img);
savename = strcat('C:\Users\Sony Vaio\Documents\Appendix\images\image_' , num2str(counter) , '.jpg'); %this is where and what your image will be saved
imwrite(img, savename);
counter = counter +1; %counter should increment each time you push the button
Instead of using a counter, you could also use a timestamp, as from CLOCK or DATESTR.
  4 个评论
显示 2更早的评论
Lloyd
Lloyd 2013-9-11
yes, that's what I'm trying to say. hehe anyway, thank you for helping me Sir Jeff EA :)
Lloyd
Lloyd 2013-9-11
one more thing sir, Is it possible to loop the whole block of code? I can't find any solutions to put on "if (insert loop rofl)"

请先登录，再进行评论。

更多回答（1 个）

Image Analyst
Image Analyst 2013-9-11
Lloyd:
Use sprintf() to construct a unique filename based on a loop counter. See the FAQ for details: http://matlab.wikia.com/wiki/FAQ#How_can_I_process_a_sequence_of_files.3F
baseFileName = sprintf('Frame %d.png', frameCounter);
fullFileName = fullfile(folder, baseFileName);
imwrite(img, fullFileName);
frameCounter = frameCounter + 1;
Put the above in a loop that keeps snapping and saving images until you stop it somehow.
  3 个评论
显示 1更早的评论
Lloyd
Lloyd 2013-9-11
Sir/Ma'am Image Analyst,
I saw your answer somewhere here about the global continueSnapping;
can I use that to call the whole block of code to a loop?
btw: I wanted to Accept your answer too since your answer is identical to JEFF EA but I didn't know that only 1 answer is allowed to be accepted. I'm sorry :(
Image Analyst
Image Analyst 2013-9-12
So it's not in a loop - it's in a pushbutton callback. So you can either make frameCounter global or persistent, or you can get a directory listing, figure out what the highest number so far is, and then increment it (which is the most complicated and longest method but probably the most robust and reliable.)

请先登录，再进行评论。

类别

在 Help Center 和 File Exchange 中查找有关 C4ISR 的更多信息

标签

产品

Community Treasure Hunt

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

Start Hunting!

Translated by