Content-aware image resize library • Hacker News Board

Re: Content-aware image resize library

#31

Post by lysium » Wed, Jan 31, 2018, 4:20 AM UTC

peterburkimsher wrote: post #19

asoto wrote: post #7

Earlier quoted context omitted.

I wrote a version of this in javascript with a live demo you can play with at https://alexander.soto.io/seam-carving

Your JavaScript version is very easy to use, and I'm so glad I can upload my own images instead of just using examples! The algorithm itself looks like it needs face (and body) detection to be really useful, though. Example: My girlfriend and I on holiday in Australia. Original: http://peterburk.free.fr/seamCarving/lighthouse.jpg Shrunk: http://peterburk.free.fr/seamCarving/lighthouse_seamCarving....

In all fairness, the read me says “Todo: face detection”

Re: Content-aware image resize library

#32

Post by squared9 » Wed, Jan 31, 2018, 4:22 AM UTC

rhema wrote: post #2

Looks really interesting. I'd love to see an animated version that shrinks from large to small.

Here you go:

https://www.youtube.com/watch?v=_JAmnloIDnI

Re: Content-aware image resize library

#33

Post by overload119 » Wed, Jan 31, 2018, 4:24 AM UTC

peterburkimsher wrote: post #19

asoto wrote: post #7

Earlier quoted context omitted.

I wrote a version of this in javascript with a live demo you can play with at https://alexander.soto.io/seam-carving

Your JavaScript version is very easy to use, and I'm so glad I can upload my own images instead of just using examples! The algorithm itself looks like it needs face (and body) detection to be really useful, though. Example: My girlfriend and I on holiday in Australia. Original: http://peterburk.free.fr/seamCarving/lighthouse.jpg Shrunk: http://peterburk.free.fr/seamCarving/lighthouse_seamCarving....

Am I the only one getting a laugh out of this? I also tried it on myself and the result was funny.

Re: Content-aware image resize library

#34

Post by peterburkimsher » Wed, Jan 31, 2018, 4:24 AM UTC

gabeiscoding wrote: post #26

I wrote a GUI for another seam carving library back in 2009[1], and it looks like although in archive mode, you can still access the source as well as the windows / mac binaries. Just tested it and it still works! Not as fancy as photoshop I'm sure, but does have the ability to paint a mask of regions to keep / remove to aid the algorithm and get the desired result. Multi-threaded too! [1] https://code.google.com/arc…

That's cool! I tried it, and the app is really nice to use, but the picture still came out looking weird. See my other comment below.

Re: Content-aware image resize library

#35

Post by peterburkimsher » Wed, Jan 31, 2018, 4:24 AM UTC

lysium wrote: post #31

peterburkimsher wrote: post #19

Earlier quoted context omitted.

Your JavaScript version is very easy to use, and I'm so glad I can upload my own images instead of just using examples! The algorithm itself looks like it needs face (and body) detection to be really useful, though. Example: My girlfriend and I on holiday in Australia. Original: http://peterburk.free.fr/seamCarving/lighthouse.jpg Shrunk: http://peterburk.free.fr/seamCarving/lighthouse_seamCarving....

In all fairness, the read me says “Todo: face detection”

That's true, and I agree with the author!

It will be more complicated than it seems, though, because I just tried the GUI version from gabeiscoding above, and got the following result:

http://peterburk.free.fr/seamCarving/lighthouse_seamCarvingG...

Re: Content-aware image resize library

#36

Post by Jack000 » Wed, Jan 31, 2018, 5:08 AM UTC

is this still the best approach to this problem? I would think that a GAN or similar would be better for keeping the correct features for things like faces etc.

Re: Content-aware image resize library

#37

Post by ianjsikes » Wed, Jan 31, 2018, 5:59 AM UTC

jontro wrote: post #12

ttoinou wrote: post #6

Could we use any direction for pixel removal, rather than only vertical or horizontal ?

Just run the algorithm twice?

Better yet, scale the image proportionally down to the largest of the two target sides, then run the algorithm once in the direction that needs to shrink.

Re: Content-aware image resize library

#38

Post by djsumdog » Wed, Jan 31, 2018, 6:06 AM UTC

AgalmicVentures wrote: post #3

Would this still be covered under the original patent until 2029 [1]? [1] https://www.google.com/patents/US8213745

Not in New Zealand, France or a host of other countries without software patents.

Where is the creator located?

Re: Content-aware image resize library

#39

Post by khedoros1 » Wed, Jan 31, 2018, 6:20 AM UTC

peterburkimsher wrote: post #19

asoto wrote: post #7

Earlier quoted context omitted.

I wrote a version of this in javascript with a live demo you can play with at https://alexander.soto.io/seam-carving

Your JavaScript version is very easy to use, and I'm so glad I can upload my own images instead of just using examples! The algorithm itself looks like it needs face (and body) detection to be really useful, though. Example: My girlfriend and I on holiday in Australia. Original: http://peterburk.free.fr/seamCarving/lighthouse.jpg Shrunk: http://peterburk.free.fr/seamCarving/lighthouse_seamCarving....

With a little change to the algorithm, you can mark areas as "must not change" and "must change", basically manually marking areas as "high energy" and "low energy".

Re: Content-aware image resize library

#40

Post by Grue3 » Wed, Jan 31, 2018, 6:41 AM UTC

Just saying, but GIMP had this for years with Liquid Rescale plugin (I think before even Photoshop): http://liquidrescale.wikidot.com/