Locating interesting parts of an image

http://www.iptech-group.com/blog/locating-interesting-parts-of-an-image

by mmastrac • 14 years ago

71 10 14 years ago

vjeux• 14 years ago

I've written the cropping algorithm being used at Facebook, here is a write-up of the method if you are interested: http://blog.vjeux.com/2012/facebook/best-cropping-position.h...

I tried to use saliency-based approaches but they don't really work that well for non artistic photos. For example, this image[1] would have edges everywhere but next to the faces.

If you have some time, I would be interested in seeing the results of your approach in my example images[2].

[1] https://fbcdn-sphotos-c-a.akamaihd.net/hphotos-ak-snc6/p206x...

[2] http://blog.vjeux.com/wp-content/uploads/2012/10/cropping.ht...

JacobiX2• 14 years ago

Very interesting approach thanks, unfortunately we don't have the social features ...

treskot• 14 years ago

From my photography experience which i also apply to graphic design the Rule on thirds and the Golden ratio are the best ways to locate / create interesting parts of an image. This can be achieved by clever cropping too.

http://en.wikipedia.org/wiki/Rule_of_thirds http://en.wikipedia.org/wiki/Golden_ratio#Aesthetics

nopassrecover• 14 years ago

Doesn't this rely on the photographer having framed the photo with that in mind originally? Given a set of arbitrary photos I'm not sure the rule of thirds could be applied in any meaningful way to pick the "interesting bits".

ChrisWoodall• 14 years ago

Reddit's thumbnailing script works nice as well, https://github.com/reddit/reddit/blob/master/r2/r2/lib/scrap...

edit: I even think you are using a similar method.

JacobiX2• 14 years ago

Yes I'm using a similar method in the first section of the article (information theoretic solution), but I think that reddit is using the entropy of an image instead of the self-information. The self-information yields to better results in our case (empirically). In the latter sections I use different methods.

Hawkee2• 14 years ago

This looks like a nice, simple solution. Now I wonder if there is a solution similar to this written in PHP.

Hawkee2• 14 years ago

I found this:

http://jueseph.com/2010/06/opticrop-content-aware-cropping-w...

Seems to be a similar solution using PHP and ImageMagick.

rangibaby• 14 years ago

Would an application of seam carving[1] be useful?

https://en.wikipedia.org/wiki/Seam_carving

foobarram• 14 years ago

Sounds VERY interesting. I was wondering - is there a python implementation of this algorithm somewhere?

Locating interesting parts of an image

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