Show HN: Remove backgrounds from images online • Hacker News Board

Re: Show HN: Remove backgrounds from images online

#31

Post by jrd79 » Thu, May 09, 2013, 10:05 PM UTC

thekiwi99 wrote: post #29

Works much better than I expected it to, so props. Brush size could be smaller though.

You can make the brush size smaller by zooming in.

Re: Show HN: Remove backgrounds from images online

#32

Post by jacobn » Thu, May 09, 2013, 10:06 PM UTC

thekiwi99 wrote: post #29

Works much better than I expected it to, so props. Brush size could be smaller though.

Yeah, it should probably be a little smaller (and note what happens when you zoom in)

Re: Show HN: Remove backgrounds from images online

#33

Post by jacobn » Thu, May 09, 2013, 10:06 PM UTC

Bjoern wrote: post #27

jacobn wrote: post #26

Earlier quoted context omitted.

Image processing backend is java, website is scala + play framework ( http://www.playframework.com/ )

RequireJS! :)

Ah, yes, and some JS for the frontend... ;)

Re: Show HN: Remove backgrounds from images online

#34

Post by [deleted] » Thu, May 09, 2013, 10:07 PM UTC

Bjoern wrote: post #15

ank286 wrote: post #8

does it use GraphCuts?

Like the interface! :) There are many ways to solve such a problem. Another one beside GrabCub would be e.g. Watershed. https://en.wikipedia.org/wiki/GrabCut http://en.wikipedia.org/wiki/Watershed_%28image_processing%2... So many variations available via e.g. OpenCV.

[deleted]

Re: Show HN: Remove backgrounds from images online

#35

Post by Bjoern » Thu, May 09, 2013, 10:07 PM UTC

Bjoern wrote: post #15

ank286 wrote: post #8

does it use GraphCuts?

Like the interface! :) There are many ways to solve such a problem. Another one beside GrabCub would be e.g. Watershed. https://en.wikipedia.org/wiki/GrabCut http://en.wikipedia.org/wiki/Watershed_%28image_processing%2... So many variations available via e.g. OpenCV.

For people interested in this exciting topic, see e.g. Chapter 5 of Szeliski's book.

http://szeliski.org/Book/drafts/SzeliskiBook_20100903_draft....

Re: Show HN: Remove backgrounds from images online

#36

Post by jacobn » Thu, May 09, 2013, 10:08 PM UTC

matchu wrote: post #30

jacobn wrote: post #11

Earlier quoted context omitted.

Yeah, we need to add both undo and reset/clear. The help should have shown during the upload / init!?

For me, the help popped up for an instant but then instantly vanished. Does it only appear during upload/init? That process can go quickly…

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... )

Re: Show HN: Remove backgrounds from images online

#37

Post by jacobn » Thu, May 09, 2013, 10:09 PM UTC

mccolin wrote: post #4

Really found this quick and useful. Easy to achieve what I often have to agonize with in Gimp or Photoshop.

Thanks!

Re: Show HN: Remove backgrounds from images online

#38

Post by cheeze » Thu, May 09, 2013, 10:10 PM UTC

Is anyone else getting an error?

"Network Error

We are having trouble connecting to the server. The following tasks have been unable to complete: Connecting to worker "Unable to connect to the worker." Waiting"

This is occurring after I drag and drop an image

Re: Show HN: Remove backgrounds from images online

#39

Post by mcescalante » Thu, May 09, 2013, 10:10 PM UTC

Adding a "step-back" button (even if it was only a few states), and the ability to increase or decrease brush size would greatly enhance this. Great start though, and something like this is much needed for a lot of people who may not know an image editor, or don't want to open it for something simple.

Re: Show HN: Remove backgrounds from images online

#40

Post by gavinpc » Thu, May 09, 2013, 10:11 PM UTC

This is great, especially for an "alpha" (ha ha).

My wife will love this for creating transparencies (she does serigraphy).