I personally do think it's a performance concern. When I view high MP images in my photo album, it can take unto 5 seconds for the image to clear up, despite the iPad being "made for it" Yes, the iPad is a powerful device as far as tablets go, but it's still a long ways away from being as powerful as a modern day desktop or laptop.
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New iPad Notes: Battery Charging at 100%, Safari Scaling Images
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I personally do think it's a performance concern. When I view high MP images in my photo album, it can take unto 5 seconds for the image to clear up, despite the iPad being "made for it" Yes, the iPad is a powerful device as far as tablets go, but it's still a long ways away from being as powerful as a modern day desktop or laptop.
Duncan Davidson ( who posted about the problem ) now found that progressive JPEGs will work.
http://duncandavidson.com/blog/2012/03/webkit_retina_bug
http://duncandavidson.com/blog/2012/03/webkit_retina_bug
Mmm, I don't like that. I hope Apple fixes it... it's definitely not a RAM issue.
Even a 2048x2048 (retina wallpaper size) image will only take up 16MBs of RAM.
Even a 2048x2048 (retina wallpaper size) image will only take up 16MBs of RAM.
Not even close. For starters it does not send the full sized image or video if you send from within an iMessage conversation: it sends a reduced size version. It does not save the high res image when you save it as it never received it in the first place.
With iMessage the issue is speed of receiving the message as well as bandwidth. You would not want to be waiting forever when someone is sending a quick pic during the conversation. Moreover, it behaves differently on WiFi than 3G/4G. This is what happens with, for example, a sample iPhone 4S pic and vid sent during an iMessage chat:
Original photo: 2448x3264 (1.7MB)
WiFi: 1440x1920 (.6MB)
3G: 960x1280 (.42MB)
Original video: 1080x1920 (48.6MB)
WiFi: 540x960 (2.6MB)
3G: 180x320 (.89MB)
Now if you send a pic or vid from outside iMessage then it is not treated the same way. In that case apparently the presumption is that you are not in the middle of a conversation so it is sent at full resolution--at least for photos. So if you took a picture and then sent to via iMessage to someone from the camera roll they get the full-resolution picture (or whatever would be sent via email--it almost treats sending that way like email).
I read someplace, perhaps on the dev center at Apple, that iMessage won't send a video or picture greater than 1GB when on 3G.
Michael
Not correct. I've downloaded wallpaper in safari and they are 2048*2048 as confirmed by iPhoto. Yet you have to open a new tap for original img though.
As for web pages, I do hope safari can solve the issue, although currently it does more scale up than scale down in daily uses.
There's an update by Duncan where it worked with progressive jpg fine. PNG graphics never had the issue, just non progressive jpg images above a certain pixel count.
A few notes.
A Lithium Ion/Polymer is full when a certain Voltage reaches a certain threshold(about 4.2 Volt), not a capacity as many people think.
You can not overcharge (Voltage) a Lithium Ion/Polymer, it will break, so anything over 100% is bad.(Explosion)
Nor can you discharge under a certain Voltage threshold, again it will break.
Charging is Temperature controlled, if it wasn't there's a big chance it may break/explode.
There's a reason why it's not that easy to buy Non-pack Li-Ion cells because of these potential dangers.
Edit : A good link to charging Lithium Ion
http://batteryuniversity.com/learn/article/charging_lithium_ion_batteries
You are wrong, it constantly checks the voltage in the cell and will only calculate the Battery meter according to this.
To calculate a batteries Capacity you have to completely charge the Battery, then discharge completely and only then you know the capacity.
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The mobile networks compress images anyway. You dont need images being compressed when you're on Wifi, so there is no need for it to even exist in Safari.
Duh? How to charge a LIPO battery:
The basic process is to charge at constant current until each cell reaches 4.2 V; the charger must then gradually reduce the charge current while holding the cell voltage at 4.2 V until the charge current has dropped to a small percentage of the initial charge rate, at which point the battery is considered 100% charged. Some manufacturers specify 2%, others 3%, but other values are also possible. The difference in achieved capacity is minute.
What Apple are doing makes perfect sense. Once the charge current has dropped significantly, the amount of energy still being transferred to the battery is negligible. It makes no sense to tell (by displaying < 100 %) the user to wait another hour for such diminishing returns.
Almost every PC laptop I've ever used NEVER stops charging. That's why the batteries wear out so quickly. At least Apple is smart enough to stop charging the battery when it's full.
The calculation of battery life is not an exact science. Sometimes my MacBook Pro battery peaks at 100%, sometimes it peaks at 96%.
Besides, just because the battery isn't charging doesn't mean that your computer is not using electricity. It's still drawing power from the AC outlet. And you're talking about pennies in any case.