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Re: [css3-images] How does image-orientation interact with EXIF data?

From: Simon Fraser <smfr@me.com>
Date: Fri, 17 Feb 2012 19:38:34 -0800
Cc: "www-style@w3.org list" <www-style@w3.org>
Message-id: <1BA0EA2F-CAA7-40F1-AFE9-E29A3453CE8F@me.com>
To: "Tab Atkins Jr." <jackalmage@gmail.com>
On Feb 17, 2012, at 3:20 pm, Tab Atkins Jr. wrote:

> On Wed, Feb 15, 2012 at 4:34 PM, Simon Fraser <smfr@me.com> wrote:
>> I still don't think it's really clear. The spec says:
>> 
>>> Sometimes images from camera phones, digital cameras or scanners are encoded sideways
>> 
>> and then in the Note:
>>> Note that in CSS, orientation data encoded in the image (e.g. EXIF data) is ignored
>> 
>> The difference between "encoded sideways"  and "orientation data encoded in the image" seems too subtle. Maybe the note should refer to metadata or even EXIF explicitly.
>> 
>> I don't know the history of image-orientation (the earliest reference on the list is http://lists.w3.org/Archives/Public/www-style/2004Jan/0249.html in 2004), but I still think that orientation issues related to EXIF are way more frequent than those due to encoding sideways. I question whether this property will be used often enough to warrant its inclusion.
> 
> Okay, how about now?  In the intro I specifically refer to how
> data-based sideways orientations can arise, then immediately have a
> note about metadata-based orientations.

Much better, thank you. My only suggestion would be to change "Note this facility..." in the second Note to "Note that this property is…", otherwise the "this" could be interpreted to still be referencing metadata.

Simon
Received on Saturday, 18 February 2012 03:39:08 GMT

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