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Show HN: Remove backgrounds from images online

clippingmagic.com

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Re: Show HN: Remove backgrounds from images online

#62

Post by jacobn »

undo wrote: post #61

Worked really well for me. One issue though: after doing a few of these and returning the main page, my uploaded images look broken. Anyway, great job!

Yeah, sometimes the thumbnailing doesn't quite succeed (that's all done client side). Somewhat unclear why. Still some debugging to do...

Re: Show HN: Remove backgrounds from images online

#63

Post by sjtrny »

jrd79 wrote: post #54
sjtrny wrote: post #49

I actually wrote my honours thesis on this topic. In academia it's called Alpha Matting/Image Matting. There's a great website http://alphamatting.com/ that provides a benchmark dataset and a comparison of a lot of influential methods. I applaud your work in making a real time and interactive matting algorithm! One day it might be also as accurate as state of the art methods. You guys should write a paper about your…

(I'm one of the devs.) Thanks for the link! Real time is a pretty big constraint, and the input for those results is a much more complete labeling than we expect (only 22 to 44 pixels around the ground truth boundary are left uncertain). But I'll definitely read the paper and hopefully we can gain some insights from it!

Have a look at KNN Matting http://ihome.ust.hk/~dli/projects/knn/. Their MATLAB implementation uses a similar style to yours but is not as real time. They take single mouse clicks and spread them over a much larger window/bounding box. Only takes a few clicks on foreground/background to get excellent results.

Re: Show HN: Remove backgrounds from images online

#68

Post by stmchn »

scott_karana wrote: post #59
jacobn wrote: post #36

Earlier quoted context omitted.

We only auto-show it during that time. The hope is that it triggers you to click the button if you need it, but lets you ignore it if you already know the drill... (all these wonderful tradeoffs between "first visit" vs "repeat visit" - and what if it was missed the first time, blabla... )

The animation was a bit too quick to make that behaviour obvious, so I just tried without it the first time. I thought it was a bug. The second time I loaded an image, it did the same thing, and only then did I actually click Help.

Yeah, same thing for me. The action was too quick for me to notice that it was intentional. I would just leave the help window open on first time use until the user decides to close it. Very nicely done site though!
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