Techniques to modify content and view content on a mobile device

A computer program product having a non-transitory computer readable medium having computer program logic recorded thereon for rendering modified graphical content, the graphical content including a plurality of cells, said computer program product comprising:

• code for rendering the graphical content upon a screen according to metadata, the metadata modifying the graphical content, the metadata specifying a viewpoint for each of the cells and a polygonal overlay for each of the cells;
• code for defining polygonal overlay metadata for each cell in at least a subset of the plurality of cells, wherein the polygonal overlay metadata includes a sequence of polygons defining a surrounding area for said each cell;
• code for rendering the sequence of polygons, in accordance with the polygonal overlay metadata, such that the defined surrounding area is adjusted in opacity and is de-emphasized with respect to salient features within said each cell;
• code for receiving user input;
• and
• code for progressing through the at least a subset of the cells, in response to the user input, wherein the progressing includes moving a camera view from cell to cell, each of the cells in the at least a subset being displayed as a focus point with the surrounding area being adjusted in opacity according to the metadata, wherein the metadata specifies the polygonal overlay metadata.

A computer-based method for associating metadata with graphical content, wherein the graphical content is divided into a plurality of cells, the method comprising:

• associating metadata with the graphical content, the metadata describing salient visual features within each of the cells, the salient visual features being previously identified by a user as being salient;
• using computer vision algorithms to process the graphical content and associate at least one of the following metadata items with the graphical content:
• viewpoint metadata for each of the cells;
• polygonal overlay metadata for each of the cells, wherein said polygonal overlay metadata for a first cell in said each of the cells specifies a sequence of polygons defining a polygonal mask for adjusting opacity of areas around said first cell such that said areas are de-emphasized with respect to said salient visual features;
• and
• providing the user with an opportunity to reject and manually change at least one of the metadata items.