Skip to content Skip to navigation Skip to collection information

Connexions

You are here: Home » Content » Adaptive Region of Interest for Video » Applications, Limitations, and Future Work

Navigation

Recently Viewed

This feature requires Javascript to be enabled.
 

Applications, Limitations, and Future Work

Module by: J Daniel Hays, Erik Funkhouser, Dan Nelson. E-mail the authors

Applications

An adaptive ROI system such as this could be used for several things. First and foremost, it could be used in the television industry to quickly and inexpensively modify widescreen movies for fullscreen broadcasting. This would eliminate the problems associated with center-cut cropping and it wouldn’t require someone to spend the time to manually pan-and-scan the fullscreen conversion.

If it could be made to run fast enough, it could be implemented in DVD players and computer-based video players (such as VLC and Windows Media Player) so that the user could determine whether they would like to watch the widescreen or the fullscreen version of their movie, depending on their monitor.

This system could also have applications in any kind of surveillance or monitoring system, as it could save on data storage by recording the regions of interest.

Limitations

There are a number of problems with this system that prevent it from immediate implementation. First and foremost, a better filtering system is needed to smooth out the movements of the ROI, because at times it is quite shaky despite the smoothing filter already being used.

Secondly, the system should be improved to recognize scene and shot changes and reset the ROI to center at these changes, so that the filtering from the ROI of the previous shot does not affect the ROI of the beginning of the current shot.

And finally, there are a lot of ways that the incorporation of the motion, edge, and focus detection results could be optimized. Right now they are simply being averaged, but it is highly likely that there is an optimum weighting of the three elements that would make for smoother, more eye-pleasing ROI determinations.

Future work

In addition to correcting the limitations of the system, there are other things that could be done. For instance, motion detection could be implemented on the detected edges, thus identifying moving edges. General optimization and improvement of all three of the detection methods could be performed, and better ways of separating foreground interest from backround interest could be implemented. And finally, adaptive seam carving and image restructuring could be performed to try to re-size the widescreen down to a fullscreen movie without cropping out info from just the sides.

Collection Navigation

Content actions

Download:

Collection as:

PDF | EPUB (?)

What is an EPUB file?

EPUB is an electronic book format that can be read on a variety of mobile devices.

Downloading to a reading device

For detailed instructions on how to download this content's EPUB to your specific device, click the "(?)" link.

| More downloads ...

Module as:

PDF | EPUB (?)

What is an EPUB file?

EPUB is an electronic book format that can be read on a variety of mobile devices.

Downloading to a reading device

For detailed instructions on how to download this content's EPUB to your specific device, click the "(?)" link.

| More downloads ...

Add:

Collection to:

My Favorites (?)

'My Favorites' is a special kind of lens which you can use to bookmark modules and collections. 'My Favorites' can only be seen by you, and collections saved in 'My Favorites' can remember the last module you were on. You need an account to use 'My Favorites'.

| A lens I own (?)

Definition of a lens

Lenses

A lens is a custom view of the content in the repository. You can think of it as a fancy kind of list that will let you see content through the eyes of organizations and people you trust.

What is in a lens?

Lens makers point to materials (modules and collections), creating a guide that includes their own comments and descriptive tags about the content.

Who can create a lens?

Any individual member, a community, or a respected organization.

What are tags? tag icon

Tags are descriptors added by lens makers to help label content, attaching a vocabulary that is meaningful in the context of the lens.

| External bookmarks

Module to:

My Favorites (?)

'My Favorites' is a special kind of lens which you can use to bookmark modules and collections. 'My Favorites' can only be seen by you, and collections saved in 'My Favorites' can remember the last module you were on. You need an account to use 'My Favorites'.

| A lens I own (?)

Definition of a lens

Lenses

A lens is a custom view of the content in the repository. You can think of it as a fancy kind of list that will let you see content through the eyes of organizations and people you trust.

What is in a lens?

Lens makers point to materials (modules and collections), creating a guide that includes their own comments and descriptive tags about the content.

Who can create a lens?

Any individual member, a community, or a respected organization.

What are tags? tag icon

Tags are descriptors added by lens makers to help label content, attaching a vocabulary that is meaningful in the context of the lens.

| External bookmarks