Show HN: I implemented seamless copy and paste of images, and wrote a tutorial

https://erkaman.github.io/posts/poisson_blending.html

by erkaman • 8 years ago

123 11 8 years ago

erkaman.github.io

erkaman4• 8 years ago

In this artice, I describe a technique that can be used to seamlessly copy-and-paste one image into another. I also provide source code(https://github.com/Erkaman/poisson_blend), that demonstrates the concepts in the article.

sgillen• 8 years ago

Looks very cool, am I correct in thinking this won't produce images that are seamless without a good mask to go along with the image?

If that's the case I'd be curious to see how it works with masks generated with e.g. photoshops smart edge detection.

acqq• 8 years ago

Check the masks here, compare them with those that you can generate fast and then please write about what you've found:

https://github.com/Erkaman/poisson_blend/tree/master/img

I'd also like to read what you can conclude.

erkaman4• 8 years ago

yes, the mask is also pretty important. otherwise, you get lots of stuff from the background of your source image in your blended image, which often looks pretty bad.

domsl• 8 years ago

That was very well explained. Would it be possible to include this into GIMP?

erkaman4• 8 years ago

since the technique is so simple, it's probably not hard at all to include into GIMP. Wouldn't surprise me if someone had already implemented a plugin for it.

tomcooks• 8 years ago

Thanks for the beautiful explanation, i have no math background and this was really easy to understand.

Ulterior examples than library+kitten/penguin would be great

erkaman4• 8 years ago

you can see more examples in the linked repo:

https://github.com/Erkaman/poisson_blend

userbinator• 8 years ago

The blurriness around the edges gives it away --- and blurring the edges is incidentally the same technique that Photoshoppers use when they can't quite get the borders right.

ovi256• 8 years ago

For people that already work with ImageMagick and would prefer an ImageMagick Poisson blend solution, this is a great resource:

http://im.snibgo.com/seamlpm.htm

It contains the windows .bas script that makes ImageMagick implement Poisson blending. It should be easily enough portable to shell code.

Show HN: I implemented seamless copy and paste of images, and wrote a tutorial

Related Stories