[Xerte] Re: FW: jpgs degrading - is this a new phenomenon?

Sat Jan 14 17:07:54 GMT 2012

It looks like XOT is stretching them, and so is having to fill in bits
(which is degradation via interpolation, which sounds redundant but lacking
the words to find a better one - negative amelioration?)

The originals are fine.

What's the maximum size? 640 something?

On Sat, Jan 14, 2012 at 5:02 PM, Alistair McNaught <
Alistair.McNaught at heacademy.ac.uk> wrote:

>  Hmmm – here’s the test I did for Pat:
>
> First 2 slides of http://itq.jisctechdis.ac.uk/xerte/play_82 show
> significant quality difference yet the image below shows they are virtually
> identical in their raw form.
>
>
>
>
>
> Curiouser and curiouser..
>
>
>
>
>
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>
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>
> *From:* xerte-bounces at lists.nottingham.ac.uk [mailto:
> xerte-bounces at lists.nottingham.ac.uk] *On Behalf Of *Dave Burnett
> *Sent:* 14 January 2012 16:56
> *To:* Xerte list
>
> *Subject:* [Xerte] Re: FW: jpgs degrading - is this a new phenomenon?
>
>
>
>
> >does it look equally blurry on your PC on that slide?
>
>
>
> Yes.
>
>
>
> Vista/Chrome
>
>
>
>
>  ------------------------------
>
> From: Alistair.McNaught at HEAcademy.ac.uk
> To: xerte at lists.nottingham.ac.uk
> Date: Sat, 14 Jan 2012 16:48:14 +0000
> Subject: [Xerte] Re: FW: jpgs degrading - is this a new phenomenon?
>
> Hi Dave / Pat – thanks for quick responses
>
> Yes these shots are all on same laptop – it appears to be a new problem.
>
> The only PCs I have access to are all the same spec but I’d be interested
> if it looks different on other people’s PCs – for example the LO I first
> spotted it on yesterday is at
>
> http://itq.jisctechdis.ac.uk/xerte/play_79 and page 14 is a slide show
> navigator. Slide 4 on page 14 is shown below as it renders for me and the
> original image is also shown superimposed. Notice how the table has become
> blurry. It wasn’t always like that .. does it look equally blurry on your
> PC on that slide?
>
>
>
>
>
>
>
> Alistair
>
>
>
>
>
> *From:* xerte-bounces at lists.nottingham.ac.uk [mailto:
> xerte-bounces at lists.nottingham.ac.uk] *On Behalf Of *Dave Burnett
> *Sent:* 14 January 2012 16:36
> *To:* Xerte list
> *Subject:* [Xerte] FW: jpgs degrading - is this a new phenomenon?
>
>
>
> Sorry, those are both on the same screen aren't they.
>
>
>
> How about Flash version then?
>
> I'm just wondering if they way Flash handles the rendering.
>
> Same effect on a different machine?
>
>
>
>
>
> From: d_b_burnett at hotmail.com
>
> To: xerte at lists.nottingham.ac.uk
>
> Subject: RE: [Xerte] jpgs degrading - is this a new phenomenon?
> Date: Sat, 14 Jan 2012 11:28:37 -0500
>
> Latest video drivers?
>
>
>
>
>  ------------------------------
>
> From: Alistair.McNaught at HEAcademy.ac.uk
> To: xerte at lists.nottingham.ac.uk
> Date: Sat, 14 Jan 2012 16:26:22 +0000
> Subject: [Xerte] jpgs degrading - is this a new phenomenon?
>
> This seems weird but yesterday I was demonstrating a learning object to
> some colleagues I was working with and I noticed that the images which I’d
> carefully crafted to be crisp and sharp and fit the available space were
> looking pixellated and ugly with lots of jpegy artefacts (like when you
> save a jpeg at too coarse a setting and get fuzz around lines etc). The
> originals I uploaded are much higher quality.
>
>
>
>
>
>
>
> However no such degradation is apparent with PNG files as shown below: (as
> before the original is at the bottom and the Xerte rendered version at the
> top). In this case the quality is indistinguishable.
>
>
>
>
>
> Is something taking place in the upload that degrades the jpgs or how is
> this oddity explained. For the short term I can use PNGs rather than JPGs
> but it introduces an extra work layer and It doesn’t help the dozens of LOs
> that used to look crisp and now look fuzzy. Any suggestions gratefully
> received!
>
>
>
> A
>
>
>
>
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>
>
>
>
>
>
> Alistair McNaught
>
> Senior Advisor
>
> *JISC** TechDis*
>
> C/O The Higher Education Academy Building
>
> Innovation Way
>
> York Science Park
>
> YORK
>
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>
> 07870567659
>
> Skype: alistair_techdis
>
> http://www.jisctechdis.ac.uk<http://www.jisctechdis.ac.uk/?utm_source=emailsig&utm_medium=email&utm_campaign=sitelaunchmail>
>
> *http://www.scoop.it/t/inclusive-teaching-and-learning *
>
>
>
> Interested in pragmatic inclusion- focused staff development?
> See JISC TechDis ITQ for accessible IT practice<http://www.jisctechdis.ac.uk/techdis/pages/detail/floating_pages/ITQ_Accessible_IT_Practice>information and taster
> resource <http://itq.jisctechdis.ac.uk/mod/resource/view.php?id=5>.
>
>
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