How to Reduce the time of capturing image

Here is my code for capturing image

vid=videoinput('winvideo',1);

vid.Framespertrigger=1;

start(vid)

im=getdata(vid);

imagename=('C:\Program Files\MATLAB\R2013a\bin\test.tif');

imwrite(im,imagename);

stop(vid);

This code is taking around 2 seconds to capture one image,but the camera frame rate specifies it is 15 frames/sec,Is it possible to capture 15 images per second or even close to it? If so what modification I should make in this code, Please help me..Thank you

Answer 1

[Image Analyst]

Use "run and time" to see where the time is being spent. I bet most of it is in calling videoinput() - that takes a long time. imwrite() also takes a long time. To speed up you can use a ramdisk or use solid state drives instead of hard drives.

Answer 2

[Anchit Dhar]

Starting/Initializing the camera takes up some time. Starting/Stopping for each frame can slow down your application considerably. In order to capture frames at a higher frame rate, you can start the camera once and then use 'manual triggering' to grab the frames in a loop. The following example describes this method.

http://www.mathworks.com/help/imaq/examples/acquiring-a-single-image-in-a-loop.html

As an alternate solution, you can use the WEBCAM interface (introduced in R2014a).

http://www.mathworks.com/help/supportpkg/usbwebcams/ug/acquire-webcam-images-in-a-loop.html