Real time video feature ectraction

hi all,

is there a way or code for feature extract video stream in matlab?

If possible, can we save this to mat file or somewhere else.

thanks for attention

[kassem EL KEBBAR]

hello , have you resolved the problem ??

[Kenta]

As of today, a use of pre-traniend network (CNN) is effective for image feature extraction.

The demo below shows the example. I hope it helpe you,

https://jp.mathworks.com/matlabcentral/fileexchange/74402-video-classification-using-lstm-lstm

Answer 1

[Image Analyst]

Yes.

[ali]

so how can we fing ı cant find on fileexcahnge or newsreader?

could you please show the links?

[Image Analyst]

Here's one: http://www.mathworks.com/matlabcentral/fileexchange/?term=authorid%3A31862

Here's another: http://www.mathworks.com/matlabcentral/answers/48797#answer_59652

[ali]

thanks for attention.

I know these files,

Just want to know is the best way for feature extract from video is that convert it to frames or can we extract features without convert to frames.

[Walter Roberson]

You do not need to convert it all to frames before you start. You can convert each frame as you need it.

[Image Analyst]

A video is a time sequence of 2D images. You do feature extraction on the image. You can work on one image at a time, or, like with motion estimation and tracking, you can use several of the images. It really depends on what you want to do. But to answer your question, you can't extract features without converting to frames, unless it's something really useless like what's the mean intensity of everything. Anything useful will require you to process the image(s).

[ali]

Walter Roberson and Image Analyst, thanks for great attention.

Then just wonder, when videois playing (real time) for example taking with camera, which frame we want to extract feature just take inside from video?

Then extract features from this frame and classify?

[Image Analyst]

Take every one that you can. I mean, how can you know if a frame has what you're looking for until you look for it?

[ali]

Ok. Thanks ı got it.

So can we save each frame features to mat file?

and How and where we can find codes for that?