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Re:Pointer Pointer (2012) by bayindirh on Friday December 11, 2020 @05:12AM (#25384136)
Today's friday. The site is cool and hilarious. Problem also looks like a good application for ML.

Bonus points for candid photos, no ads, low resolution images and nostalgic scenes.

I like this structure of HN. Kinda like old Slashdot. Something funny and lighthearted amongst all the heavy articles.

Re:Pointer Pointer (2012) by qayxc on Friday December 11, 2020 @05:26AM (#25384212)
> Problem also looks like a good application for ML.

Wouldn't that be complete overkill, though? Zooming and panning are so much simpler and less compute intensive.

Re:Pointer Pointer (2012) by theshrike79 on Friday December 11, 2020 @05:29AM (#25384232)
I think the idea was to find images that point to a certain location from a collection of photos.

Not having a bunch of photos of people pointing and just zooming/panning to that bit.

Re:Pointer Pointer (2012) by qayxc on Friday December 11, 2020 @07:38AM (#25385052)
ML methods would require labelled data to be trained.

Labelling itself already solves the issue (i.e. a bunch of photos with people pointing in certain directions).

So basically you'd solve the problem you want to solve in order to automate a task that you already performed.

Re:Pointer Pointer (2012) by nightcracker on Friday December 11, 2020 @07:54AM (#25385171)
> ML methods would require labelled data to be trained.

Not necessarily.

One could train a model on synthesized data using e.g. blender, some programmable 3D people models with hand controls and some generic background images to paste them on.

Re:Pointer Pointer (2012) by sillysaurusx on Friday December 11, 2020 @08:56AM (#25385744)
I've heard of this being used. It's surprising to hear you mention it. Have you done that?

It's a neat idea, and I hope it becomes more popular.

Re:Pointer Pointer (2012) by nightcracker on Friday December 11, 2020 @12:59PM (#25388606)
> It's surprising to hear you mention it.

Me specifically or in general?

Anyway, for a Multimedia Information Retrieval course I chose to do my term project on training a neural network with synthetic data. In particular I modded Minecraft such that when I press a button it saves two screenshots: one regular and one where the game renders a depth map instead. I used this to generate ~1000 samples with perfectly accurate depth maps. Because of the mods, texture pack and world I used the data was somewhat realistic: https://i.stack.imgur.com/Zai51.jpg https://i.stack.imgur.com/eamMR.png

This data was then used to train a neural network to predict the depth map of unseen images. It was relatively successful, but requires more data and more research, I only had so much time for a term paper.