Madvillain
Level 1 (15 points)

Q: resolution/dpi of safari?

With the new rMBP capable of displaying something around 220 dpi, what is the top resolution or dpi that Safari is able to produce? Is it site specific or does the browser eventually scale down images?

Basically if you upload an image to a site at a resolution of 220 dpi, will it show up as 220 dpi on any display that can support that resolution?

 

Thanks for any help or info about this.

Mac OS X (10.7.2)

Posted on Jul 3, 2012 12:31 PM

by Neville Hillyer,Solvedanswer
Neville Hillyer Neville Hillyer
Level 4 (1,877 points)
Mac OS X
A:

Until there is information to the contrary perhaps we should assume it is 220 dpi and that Apple Applications support this.

 

Here is an Apple page about it:

 

http://support.apple.com/kb/HT5266

Posted on Jul 3, 2012 3:23 PM

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Madvillain

Q: resolution/dpi of safari?

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  • Helpful answers

  • by Neville Hillyer,Helpful

    Neville Hillyer Neville Hillyer Jul 3, 2012 1:48 PM in response to Madvillain
    Level 4 (1,877 points)
    Mac OS X
    Jul 3, 2012 1:48 PM in response to Madvillain

    Do you know of any display which can display at 220 dots per inch. For many years most displays were about 3 dots per mm but I am not sure if this has changed.

     

    Do not confuse the stated screen resolution with the capabilities of the display.

     

    In general images are so many pixels wide and they normally (not always) contain extra data about the width they should be displayed at.

     

    Browsers try to combine this with user preferences. In general they will scale to reduce an image to screen/window width or less if directed by HTML or CSS in a web page.

     

    Proper web servers do not alter images.

     

    Browsers display images better and faster if they don't have to scale them but you may want to use a higher resolution if the images are going to be printed.

     

    What are you trying to do?

  • by Madvillain,

    Madvillain Madvillain Jul 3, 2012 2:11 PM in response to Neville Hillyer
    Level 1 (15 points)
    Jul 3, 2012 2:11 PM in response to Neville Hillyer

    Thanks for the reply.

     

    I am trying to figure out what resolution to export images at for the new retina MBP. I believe it has the capability to display images at 220 pixels per inch, which is just about up there with a standard lab print resolution of 250 dpi. I don't know if the 220 is scaled (and thus really like 110) or if it's 220 and Safari doesn't display it as such or how it works - thus the topic.

     

    So I'm wondering if the retina macbook, using Safari, actually displays images at 220 ppi or if they are scaled. My understanding is that the standard 72 ppi images do not look very good on a new retina MBP.

     

    Thanks for any help!

  • by Neville Hillyer,Solvedanswer

    Neville Hillyer Neville Hillyer Jul 3, 2012 3:23 PM in response to Madvillain
    Level 4 (1,877 points)
    Mac OS X
    Jul 3, 2012 3:23 PM in response to Madvillain

    Until there is information to the contrary perhaps we should assume it is 220 dpi and that Apple Applications support this.

     

    Here is an Apple page about it:

     

    http://support.apple.com/kb/HT5266

  • by Madvillain,

    Madvillain Madvillain Jul 3, 2012 3:29 PM in response to Madvillain
    Level 1 (15 points)
    Jul 3, 2012 3:29 PM in response to Madvillain

    Funny thing. I found that page when I googled this but didn't notice 'safari' listed on it.

    Thanks for the help. I guess assuming 220 for now seems like the safest thing. Good idea.