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Posted on 31/08/08 07:13:19 AM |
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Nick Curtain
Model Master Posts: 1768 Reply  |
Image Corruption.
There are occasions when images I upload, or those posted by other members, fail to appear properly. For example, the image may be fine at the top, but then half way down it deteriorates and the lower portion is unrecognisable, i.e. much darker or a different colour. The most recent was when I opened the ferry image for this weeks challenge. I've posted it here and hopefully you will see the banding I'm referring to. Nobody else this week seems to have encountered the same issue. It's almost as if the image is being displayed before it is rendered properly. On occasions, it's taken me a couple of attempts to upload a challenge image. This happens frequently with some peoples work, in particular Brewell's entries, which are often distorted on my screen. Anna's boat pic has a horrible green cast, yet the animation is fine. This only happens at home and the images are fine when I view at work. However, some images do not appear altogether there and I've put this down to something in the network system blocking them. I run normal Windows XP. Is my system out of sync with Steve's server? A rather technical one for so early on a Sunday morning, but any thoughts would be appreciated. Nick 
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Posted on 31/08/08 7:19:51 PM |
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cy98
** Posts: 104 Reply |
Re: Image Corruption.
What type of internet connection do you have, cable, satellite, DSL or dial-up? Is it wired in direct or a wireless router shared with others? Not a expert, but seems like the connection is introducing noise. |
Posted on 31/08/08 9:22:20 PM |
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Nick Curtain
Model Master Posts: 1768 Reply |
Re: Image Corruption.
Hi cy I am on Virgin broadband via cable and a wireless router feeds two computers, although one is off most of the time. The HTCIPS site is the only one on which I have experienced this issue, otherwise the Internet is rapid and works fine. The strange thing is that the situation I've explained does not always happen. Nick |
Posted on 31/08/08 9:38:27 PM |
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Steve Caplin
Administrator Posts: 7068 Reply  |
Re: Image Corruption.
I'm also on Virgin Broadband, as it happens, and this never happens to me - and the image you posted above looks perfect. Could it be that some jpeg images are not being interpreted correctly by your browser? Have you tried Firefox instead of IE? |
Posted on 31/08/08 10:55:57 PM |
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dave.cox
Marquee Master Posts: 518 Reply  |
Re: Image Corruption.
As I do need web development, I keep IE, Firefox, and Safari on my computer so I can check for differences on the sites that I develop. I checked this site in all three browsers, and I do not see the problem that you described. I have also viewed this site from my system at work many times, and do not see any problem with the site. I too run XP from both locations. Dave. |
Posted on 01/09/08 00:20:51 AM |
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vicho
Ingenious Inca Posts: 248 Reply  |
Re: Image Corruption.
hi Nick well, i can see the banding you talk about, on the image above...this is more noticeable on the side of the stairs..first time i see this happening  |
Posted on 01/09/08 01:06:15 AM |
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cy98
** Posts: 104 Reply |
Re: Image Corruption.
Sometimes you can get banding if the monitor resolution is not set correctly. The safest setting is the native resolution of the monitor. Not sure that would explain your condition as it is intermittent. |
Posted on 01/09/08 08:09:21 AM |
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Nick Curtain
Model Master Posts: 1768 Reply |
Re: Image Corruption.
Hi all Many thanks for your comments. I'm at work now and there is no banding when I open the ferry image, yet the image above, which I saved and posted, does show a darker band about a third of the way down from the top. Steve, I'll give firefox a whirl, but as said, this happens only on occasions and the majority of the time it's fine. Cy - the monitor is an NEC Multisync and is set to the default SRGB and resolution settings and as saved files still carry errors, I would have thought it is a system issue and not the monitor. Could it be the screen saver cutting in? Thanks again. Nick |
Posted on 01/09/08 12:38:20 PM |
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Meltonian
Highlight Hermit Posts: 90 Reply  |
Re: Image Corruption.
Nick, The image you have posted above is definitely corrupted - I've just looked at it in six different browsers and the banding is there in all of them! To the posters that say the image looks fine, dare I suggest they just haven't noticed the problem? I've highlighted it below to show where the problem is most apparent. I've seen this sort of thing before on images that a camera hasn't captured properly, but never on images that have been re-saved. It must be your machine, but definitely not your monitor!  |
Posted on 01/09/08 1:06:04 PM |
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Steve Caplin
Administrator Posts: 7068 Reply |
Re: Image Corruption.
You're right, of course - I hadn't looked closely enough at the image. Partly because the damage coincides with the horizon. It's clearly corrupted. Very odd. This is way out of my area of expertise! |
Posted on 01/09/08 8:02:43 PM |
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David Asch
Tech Support Posts: 1913 Reply  |
Re: Image Corruption.
Have you tried clearing the cache on the browser? It could be that it's full and unable to save properly. _________________ Leap and the net will appear |
Posted on 01/09/08 8:04:30 PM |
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Nick Curtain
Model Master Posts: 1768 Reply |
Re: Image Corruption.
Thanks for looking everyone. My machine loads and saves files of all types without any issues and it's only here that I have an issue and it's not all the time. I've posted for the challenge and seen banding on a couple of occasions and then had success on the second attempt. Nick |
Posted on 01/09/08 8:08:31 PM |
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Nick Curtain
Model Master Posts: 1768 Reply |
Re: Image Corruption.
Apologies David, our posts must have crossed. How would I do that? Nick |
Posted on 01/09/08 8:27:00 PM |
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Nick Curtain
Model Master Posts: 1768 Reply |
Re: Image Corruption.
David, not only are you a true gentleman, but a living genius. I went into tools in the Windows Explorer menu and deleted the temporary internet files, Cookies and the History. I hope I've done the right thing, but whatever happened it worked. Just before that I had tried opening the ferry image and the same corruption appeared, but after performing the above it worked fine and Anna's image appears ok too. Coincidence, I don't think so!! Great to be part of this wonderful forum. Nick |
Posted on 01/09/08 10:08:07 PM |
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David Asch
Tech Support Posts: 1913 Reply |
Re: Image Corruption.
Sorry, I didn't see your follow-up question. You only need to clear the cache in future, that's the main culprit. _________________ A happy-go-lucky chap, always dressed in black |
Posted on 02/09/08 00:56:01 AM |
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cy98
** Posts: 104 Reply |
Re: Image Corruption.
That is interesting about the cache being full causing the problem.. Never thought of that. The utility CleanUp! is excellent to clean out temp files, empty recycle bin, and web browsing files. Extremely fast, takes less than 12 seconds on my machine. |
Posted on 02/09/08 1:17:23 PM |
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dave.cox
Marquee Master Posts: 518 Reply |
Re: Image Corruption.
Yes, the Cache can cause this kind of problem. Temp files, the recycle bin, and web browsing files all deal with file storage. Cache deals with memory usage. If memory isn't cleared by IE correctly, (And that does happen at times), then IE will sometimes have trouble displaying things correctly. The best solution for this is to switch to Firefox or Safari. |
Posted on 02/09/08 3:45:51 PM |
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Steve Caplin
Administrator Posts: 7068 Reply |
Re: Image Corruption.
Or buy a Mac, of course... |
Posted on 03/09/08 05:55:57 AM |
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Nick Curtain
Model Master Posts: 1768 Reply |
Re: Image Corruption.
Thanks again all Cy, the funny thing is that I had only just used Disk clean up last week and had asked it to remove all the temp files. Perhaps it took the tools function in IE do do the job properly? I take it Cache is temp internet file memory?. Sorry to be thick! Nick |
Posted on 03/09/08 1:49:30 PM |
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dave.cox
Marquee Master Posts: 518 Reply |
Re: Image Corruption.
Yes, you could do that, but that requires an investment of that elusive stuff referred to as money. You can get Firefox or Safari for free. 
Cache is temporary storage space used by the browser to store and redisplay pages that you have visited recently. Part of it can be in memory, and part can be in a temp file. But these files are managed by the browser, and sometimes deleted when you close the browser. The information can become corrupted. The reason for doing this is to reduce the need for waiting for pages with a lot of information being downloaded over and over again when you are on a slow connection. I usually keep my browser set to download pages on every visit, which is why I wouldn't see the problem. That setting is best for me, because I do a lot of development work. Most people do best by setting the browser to download new pages every time the browser is restarted. In IE, you can check or change this setting by going to Tools>Internet Options. In the "Temporary Internet Files" area, click "Settings" At the top of the dialog you will see where you can set how IE will download or store new pages. Dave |
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