Forum : Photosynth Lounge

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Topic: Swapping out photos

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chris.alexander (Over 1 year ago)
I will be creating a photosynth that I would like to update occasionally. Can individual photos or groups of photos be "swapped out" of a photosynth without having to redo the entire thing?

Let's say I am doing a photosynth "tour" of the inside of an office building and a couple of the businesses in the building go out of business and I want to update the series of photos these businesses are in. Can I simply replace these photos in my photosynth without having to re-upload everything or would it be like starting all over again?

Thanks
Nathanael (Over 1 year ago)
Hi there, Chris,

There's no replace feature. Any time that you want a variation on a synth, you'll need to recalculate the photos positions (this is because the process inherently compares every image to every other image in a collection in order to calculate their positions), however you should note that no photo is ever uploaded to Photosynth twice unless you edit your local copy of the image after it's uploaded the first time.

This means that although when you recalculate the hypothetical office building, any photos used in your previous synths which will also be used in your new version of your synth will not be uploaded, so only the new photos and the new position information will need to be uploaded.

I hope that helps. Feel free to ask if there's anything else you're wondering about or something that I didn't answer.
chris.alexander (Over 1 year ago)
I'm pretty sure that answered my question. My concern was keeping my synth (actually there will be 3) up to date without having to spend a significant amount of time doing it. I think I will have to update at least once per quarter as elements within my synth change.

A bigger question I have now is how does one embed a picture within a picture. I know that this program uses seadragon and that with seadragon (at least the demo I saw) allowed you to embed images within images. This would be helpful to me in the application of providing details about a business within a photo of that business.
Nathanael (Over 1 year ago)
While it is true that Photosynth uses Seadragon's 'collections' for its image presentation engine, the image positioning within Photosynth is 100% automated and relies fully on computer vision algorithms to match how images overlap.

This is not to say that it would be impossible to achieve the effect that you describe from Deep Zoom Composer, but it wouldn't be a 'sparse image' as would be generated by Deep Zoom Composer, but rather you would have to use Photoshop or the like to blow one of your images up large enough so that the others which you wish to embed will be able to be viewed at full resolution but at the correct scale within the parent image.

This is only to say that you will need to make a traditional high resolution 'collage', as it were, providing the final output in JPG form to Photosynth, rather than appealing to Seadragon metadata for the position and scale of each image.

The first example that came to mind that is similar to this is as follows:
chris.alexander (Over 1 year ago)
Nathanael, I greatly appreciate you lending your expertise here. Over the next few months I will be working on my Synth and will post more questions as I go I am sure.
Thanks again
Chris
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