Unsupervised automatic tagging algorithms?

Question

I want to build a web application that lets users upload documents, videos, images, music, and then give them an ability to search them. Thin

Answer 1

I posted a blog article today to answer your question.

http://scottge.net/2015/06/30/automatic-image-and-video-tagging/

There are basically two approaches to automatically extract keywords from images and videos.

1. Multiple Instance Learning (MIL)
2. Deep Neural Networks (DNN), Recurrent Neural Networks (RNN), and the variants

In the above blog article, I list the latest research papers to illustrate the solutions. Some of them even include demo site and source code.

Thanks, Scott