Apple faking 489 to 815 PPI on iPhone 4 ads • Hacker News Board

Re: Apple faking 489 to 815 PPI on iPhone 4 ads

#11

Post by confuzatron » Tue, Jun 08, 2010, 4:59 PM UTC

pchristensen wrote: post #4

I also posted this on the article: No one that sees these videos or ads on the web will be using a 300dpi screen so they need to overcompensate. A more interesting comparison will be what resolution they show in their print ads.

Well, looking at the keynote slide, the samples are heavily zoomed in so 'old' pixels are depicted as tens of screen pixels high. For an honest portrayal, it's easy: 'new' pixels just need to be depicted as half-as-high. Sorry, but the '300dpi' blather is complete reality-distortion nonsense. :)

Re: Apple faking 489 to 815 PPI on iPhone 4 ads

#12

Post by malvim » Tue, Jun 08, 2010, 5:00 PM UTC

graywh wrote: post #10

SandB0x wrote: post #8

I liked the old adverts that tried to show you how sharp DVDs were...on VHS.

I seem to recall current ads doing the same thing comparing digital cable to analog....

Same with DVD vs Blu-Ray

Re: Apple faking 489 to 815 PPI on iPhone 4 ads

#13

Post by rbanffy » Tue, Jun 08, 2010, 5:14 PM UTC

pchristensen wrote: post #4

I also posted this on the article: No one that sees these videos or ads on the web will be using a 300dpi screen so they need to overcompensate. A more interesting comparison will be what resolution they show in their print ads.

> No one that sees these videos or ads on the web will be using a 300dpi screen so they need to overcompensate

No reason to overcompensate. What Apple shows is one enormously blown-up pixelated "before" screen compared to an "after" one displayed on the native best-possible resolution of the display people are seeing. They show much more than a 2x improvement (it's twice as high, not 4 times, because resolution is measured linearly, not by area)

Re: Apple faking 489 to 815 PPI on iPhone 4 ads

#14

Post by seanalltogether » Tue, Jun 08, 2010, 5:19 PM UTC

Is 300 really the max of the eye, I wonder how that is calculated. For instance, if you had a 1 pixel line at about a 15 degree angle, does that mean you would see no aliasing effects?

Re: Apple faking 489 to 815 PPI on iPhone 4 ads

#15

Post by smackfu » Tue, Jun 08, 2010, 5:19 PM UTC

I was wondering about that. It did look like the "after" image was just someone using the font at full resolution, rather than being properly scaled down.

Re: Apple faking 489 to 815 PPI on iPhone 4 ads

#16

Post by [deleted] » Tue, Jun 08, 2010, 5:20 PM UTC

goatforce5 wrote: post #7

redstripe wrote: post #5

Earlier quoted context omitted.

As a side note, doesn't the guy talking to the woman with the baby look like a younger and chubbier steve jobs? You know iClone is coming soon. Everyone will get a hot model. Hell with Microsoft, I'm switching for sure when that happens.

I'm thinking that Jonathan Ives is turning in to Steve Jobs.

[deleted]

Re: Apple faking 489 to 815 PPI on iPhone 4 ads

#17

Post by jfoutz » Tue, Jun 08, 2010, 5:24 PM UTC

confuzatron wrote: post #11

pchristensen wrote: post #4

I also posted this on the article: No one that sees these videos or ads on the web will be using a 300dpi screen so they need to overcompensate. A more interesting comparison will be what resolution they show in their print ads.

Well, looking at the keynote slide, the samples are heavily zoomed in so 'old' pixels are depicted as tens of screen pixels high. For an honest portrayal, it's easy: 'new' pixels just need to be depicted as half-as-high. Sorry, but the '300dpi' blather is complete reality-distortion nonsense. :)

Do you have the slides? I just saw the image from the guy's site. I'm not sure how much the angle of the photo will compress the distant (high quality) letter. those displays are huge, so maybe the letters are 30' apart? it's not clear how far away the camera is.

They are kind of weird samples. For example the big pixel side is highlighting 25 pixels, but you could easily draw a 16 pixel square and assert the light row should go in the next sample. Also, the big side is taken from a point with a -1 slope, but the little side is much steeper, maybe 5? It seems like you'd want to compare the same section of both letters.

Also, it's not really clear to me why each red box in the lower left sample has 2 or more colors. That seems like a good indicator that the red box != one pixel.

Re: Apple faking 489 to 815 PPI on iPhone 4 ads

#18

Post by bbatsell » Tue, Jun 08, 2010, 5:27 PM UTC

seanalltogether wrote: post #14

Is 300 really the max of the eye, I wonder how that is calculated. For instance, if you had a 1 pixel line at about a 15 degree angle, does that mean you would see no aliasing effects?

http://news.ycombinator.com/item?id=1412296

Re: Apple faking 489 to 815 PPI on iPhone 4 ads

#19

Post by confuzatron » Tue, Jun 08, 2010, 5:27 PM UTC

jfoutz wrote: post #17

confuzatron wrote: post #11

Earlier quoted context omitted.

Well, looking at the keynote slide, the samples are heavily zoomed in so 'old' pixels are depicted as tens of screen pixels high. For an honest portrayal, it's easy: 'new' pixels just need to be depicted as half-as-high. Sorry, but the '300dpi' blather is complete reality-distortion nonsense. :)

Do you have the slides? I just saw the image from the guy's site. I'm not sure how much the angle of the photo will compress the distant (high quality) letter. those displays are huge, so maybe the letters are 30' apart? it's not clear how far away the camera is. They are kind of weird samples. For example the big pixel side is highlighting 25 pixels, but you could easily draw a 16 pixel square and assert the light r…

Sorry, no, when I say slide I'm looking at the photo of Steve Jobs with a big screen behind him showing two letter 'a's. One is heavily pixellated, and the other one is smooth in comparison - at the resolution of the slide display. Given the size of the old pixels, the new pixels should be easily visible but aren't.

Of course it could be a misleading screen-grab and the slide was not purporting to show old iPhone resolution next to new iPhone resolution here. Maybe it's 'old' compared to 'perfect'.

(I should point out, my participation in this crucial discussion is dependent entirely on the slowness of my compiler).

Re: Apple faking 489 to 815 PPI on iPhone 4 ads

#20

Post by hackermom » Tue, Jun 08, 2010, 5:32 PM UTC

This is a bit of sensationalist non-news, isn't it? I mean, we all know how exactly every single computer software/hardware manufacturer always use "resolution-less" photographs in their ads on computer screens, cellphone screens and so on.