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The "AdityaDhulipala" page has been changed by ChrisMattmann: https://wiki.apache.org/tika/AdityaDhulipala?action=diff&rev1=2&rev2=3 === Pooled Time Series parser for Tika === - I'm working on integrating Dr. Ryoo's research work into Tika + I'm working on [[PooledTimeSeriesParser|integrating Dr. Ryoo's research work into Tika]]. - [[http://michaelryoo.com/jpl-interaction.html]] - [[https://github.com/chrismattmann/pooled_time_series]] - [[http://arxiv.org/pdf/1412.6505v2.pdf]] - - ==== Metadata Representation ==== - - The ultimate goal of the project is to be able to extract metadata from videos and index it inside Solr. - - Videos, like images, are just numbers - or a ordered sequence of number - or matrices. - - There are many ways in which these numbers can be defined. - Some popular visual descriptors are Histogram of Gradients, Optical Flow vectors, RGB or Color Histograms. - The challenge is to figure out a way to map this datatype to a datatype that can be understood by Solr. - - In the case of color based histograms, we can convert the image into a matrix of hex values, where each hex value is the pixel color value - and index that as a text_ws field in Solr. - - This is what ShutterStock did with respect to an image search tool they've built - https://lucidworks.com/blog/shutterstock-searches-35-million-images-color-using-apache-solr/ - - Another idea I was thinking of was to index the data as a XHTML document of table values, - - where each <tr>..</tr> would be a row of the feature matrix and <td> would be the corresponding element in that column. - - However, while performing ranking or querying we would have to compute a distance function on these values (for the dataset and the query video) - - How have other users solved this problem? There must be instances of matrix type data showing up in other domains, - such as geography, physics and other scientific domains. How is the metadata designed in such cases? - - ---- CategoryHomepage
