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

Sat Jan 14 16:55:41 GMT 2012

>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

Alistair McNaught
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