Computing desk
< January 10	<< Dec \| January \| Feb >>	January 12 >

Welcome to the Wikipedia Computing Reference Desk Archives
The page you are currently viewing is an archive page. While you can leave answers for any questions shown below, please ask new questions on one of the current reference desk pages.

January 11[edit]

DeepDream and noise[edit]

If DeepDream is left trained on the same image for an excessively large number of iterations, does a kind of random noise result? What does that look like? Can you find me an example? Card Zero (talk) 18:10, 11 January 2017 (UTC)[reply]

I remember reading, perhaps a year or so ago, that in these circumstances it may produce a vaguely face-like image (though with over-large "eyes"), regardless of the starting point. However, I have absolutely no recollection of when and where (internet, print magazine etc) I came across this. Perhaps my less-than helpful answer will prompt someone else's memory. {The poster formerly known as 87.81.230.195} 2.122.62.241 (talk) 08:37, 14 January 2017 (UTC)[reply]

Lots of things can look "vaguely face-like" - such as the Face on Mars. The phenomenon is known as pareidolia. Mitch Ames (talk) 12:17, 14 January 2017 (UTC)[reply]

In fact, Pareidolia#Computer vision actually refers to "... the DeepDream software, which falsely detects and then exaggerates features such as eyes and faces in any image." Mitch Ames (talk) 12:20, 14 January 2017 (UTC)[reply]

Watching the longest youtube videos (in terms of number of iterations) that I could find, two of them did resolve to a kind of soup of human-like faces dominated by large eyes (which had a lot of blue-green around them, as if belonging to an amalgamation of animals). So I think you're right, this must be how it typically plateaus to a local maximum. Thank you. Card Zero (talk) 14:55, 14 January 2017 (UTC)[reply]

"Apple Certified Pre-owned" iPhone[edit]

I just bought an iPhone 6S on eBay. It was advertised as new but arrived marked "Apple Certified Pre-owned". What exactly does this mean? Will it be in new condition aesthetically, eg. no scratches? Will it have the same life as a new unit? Etc. Amisom (talk) 22:27, 11 January 2017 (UTC)[reply]

Have you tried google? Vespine (talk) 00:30, 12 January 2017 (UTC)[reply]

Yes. I didn't find answers to either of the two questions I asked above. Thanks @Vespine:. Amisom (talk) 08:35, 12 January 2017 (UTC)[reply]

Not sure why it didn't work for you. When I search for 'Apple Certified Pre-owned scratches' or 'Apple Certified Pre-owned scratch' or 'Apple Certified Preowned scratch' or 'Apple Certified Preowned scratches' or 'Apple Preowned scratch' or 'Apple Preowned scratches' i.e. the logical search terms based on your question I find [1]. As for the second question, these sort of things are generally impossible to answer. I mean some companies have return rates for such devices so have a good idea, but they don't tell it to ordinary consumers. Nil Einne (talk) 01:46, 13 January 2017 (UTC)[reply]