| 16 posts in this topic |
|
|---|
page : 1 2
| author | message | date posted ↑ | ||
|---|---|---|---|---|
|
Picture quality loss... Please help! |
23 Oct 2007 at 14:21 GMT | ||
|
number of posts: 4 member since: 2 Aug 06 location: fr status: offline 
| Hello Sorry if this has been discussed before but I didn't find any topic that would help me fix the problem... A picture I have just uploaded looks very unsharp once displayed on Shutterchance, compared to the original one. I first thought about some sharpening/watermarking settings unproperly set but I found myself unable to access them again... Have they been removed? Or is it a compression issue? Should I resize my images before sending them? Many thanks for your help... Julien Scheffer | |||
|
re: Picture quality loss... Please help! |
23 Oct 2007 at 14:57 GMT | ||
|
number of posts: 18 member since: 5 Dec 06 location: uk status: offline
| Julien- I also am having uploaded image issues. For the last week or so, every image I have uploaded has been too pale, with no depth to dark tones. The SC management need to look into this, as it has only just started a few days ago. Others (EG maxblack) have also noticed this reduced quality. By the way, the recommendation is that you should resize your images before uploading to 300dpi, and 1000 pixels along the longest side. Hope this helps! | |||
|
re: Picture quality loss... Please help! |
23 Oct 2007 at 16:40 GMT | ||
|
number of posts: 4 member since: 2 Aug 06 location: fr status: offline
| Thanks David, greatly appreciated! | |||
|
re: Picture quality loss... Please help! |
23 Oct 2007 at 18:37 GMT | ||
|
number of posts: 72 member since: 12 Aug 07 location: us status: offline
| Why would you need 300dpi, if a computer screen can display max of 72 dpi? These pictures are not for printing. post replying to 's post: > Julien- I also am having uploaded image issues. For the last week or so, every image I have uploaded has been too pale, > with no depth to dark tones. The SC management need to look into this, as it has only just started a few days ago. Others > (EG maxblack) have also noticed this reduced quality. By the way, the recommendation is that you should resize your > images before uploading to 300dpi, and 1000 pixels along the longest side. Hope this helps! | |||
|
re: Picture quality loss... Please help! |
23 Oct 2007 at 23:47 GMT | ||
|
number of posts: 18 member since: 5 Dec 06 location: uk status: offline
| Hi, VZ, I don't know why 300dpi is required, I'm only repeating what I was advised to do by a more experienced SCer! Maybe if "the management" read these messages, they will tell us the best settings! | |||
|
re: Picture quality loss... Please help! |
24 Oct 2007 at 08:11 GMT | ||
|
number of posts: 43 member since: 30 May 06 location: uk status: offline
| It's my understanding (and my own experiences confirm this) that if you upload an image which is the correct display size, then Shutterchance will not need to do any resizing for you. If you want to retain control of your images, you should do the resizing yourself. For the old template, make the long side of the image exactly 700 pixels long. For the new template, if the image is landscape format, make the width between 700 and 1000 pixels long, and the height no larger than 700 pixels. For a new template portrait format, make the height exactly 700 pixels. Once you've sized your image, you can apply a little extra sharpening if the image needs it. The resolution, ppi/dpi, is totally irrelevant - it's only the actual number of pixels that matter. If you're getting no depth to your dark tones, and the colours seem drab, it could be that you've forgotten to convert the image to the sRGB colourspace before posting. As far as I know, the only colourspace-aware 'common' browser is safari, and it would still need to know the profile so it could render it properly. All other browsers expect images to be in the sRGB colourspace. Wider gamut colourspaces like AdobeRGB or ProPhoto are fine as working colourspaces, but for web use, the final display image needs to be converted to sRGB. For photoshop CS, use convert profile under the image menu. For CS2/3, it's under the edit menu. Sorry if you already know this and have already discounted it. | |||
|
re: Picture quality loss... Please help! |
24 Oct 2007 at 08:24 GMT | ||
|
number of posts: 43 member since: 30 May 06 location: uk status: offline
| No sooner had I written the above, than I looked at another topic about resizing. In that topic, John says: "The larger display of images really only comes into play when dealing with landscape shots. Basically, the system tries to resize the image such that the height of the image is at most 700 pixels or the width is at most 1000 pixels (whichever comes first)..." For a landscape image in the new template, this is not quite the same as I was saying. Using his guidance (and he is one of the major players in the development of the Shutterchance site if you didn't already know) you'd need to resize your image so it fits into a 1000 pixel side by 700 pixel high box before uploading (assuming you want control over the resizing yourself). From a previous conversation with John, I believe that Shutterchance will only resize an image to make it smaller, it won't make it bigger. Unless it's changed recently, I have found that if you upload a landscape image where the long side is between 700 and 1000 pixels, it won't be resized even if the height is less than 700 pixels. Here's an example image, which is 800 x 578 pixels: http://steve.shutterchance.com/photoblog/The_Pyramid_/ | |||
|
re: Picture quality loss... Please help! |
24 Oct 2007 at 09:15 GMT | ||
|
number of posts: 18 member since: 5 Dec 06 location: uk status: offline
| Many thanks Steve- my poor-contrast images are probably because I am set in Adobe RGB, so I shall experiment with one tonight that I shall convert to sRGB. If that's successful, the only question will be why has this suddenly started this week?! Thanks again. | |||
|
re: Picture quality loss... Please help! |
26 Oct 2007 at 11:47 GMT | ||
|
number of posts: 460 member since: 4 Jun 06 location: uk status: offline
| Steve, many many thanks for that explanation (especially the colour-spacing - I would have needed Duane's input on that otherwise :S). Everything you've said is bang on the money. The system only resizes to make it smaller if necessary. What is weird though is the report that this only has been happening over the past week. We haven't modified anything on that front (neither algorithm nor processing library), so kind of at a loss regarding this. Cheers, John -shutterchance.com | |||
|
re: Picture quality loss... Please help! |
27 Oct 2007 at 18:53 GMT | ||
|
number of posts: 4 member since: 2 Aug 06 location: fr status: offline
| Wow many thanks to you all, especially Steve! Resizing portrait pics to 700 pixels in height does indeed make a difference. There's still a slight colour problem (pictures look drab) I can't explain because my pictures are already in sRGB... Any suggestions about the colour? Anyway thank you very much guys for your time... Julien | |||
|
re: Picture quality loss... Please help! |
30 Oct 2007 at 14:52 GMT | ||
|
number of posts: 10 member since: 2 Jan 07 location: ca status: offline
| I have also experienced this problem, and also only within the timeframe mentioned. My photos are in sRGB. (I briefly experimented with other colourspaces, just to confirm for myself that that was the wrong thing to do.) I have yet to try the solution suggested of doing the resizing myself before uploading. I will see if that makes a difference. | |||
|
re: Picture quality loss... Please help! |
31 Oct 2007 at 00:13 GMT | ||
|
number of posts: 18 member since: 5 Dec 06 location: uk status: offline
| Just to throw in another variable that David (Maxblack) has suggested to me, which quality setting are we using when saving as JPEG. Lately I have always saved at highest (12) quality- what are you guys and gals doing? | |||
page : 1 2
| quick reply | |
| what's going on? | |
|
0 members currently browsing forum 585 topics in total in this forum 16 posts in total in this topic latest post was 12 Nov 2007 in Picture quality loss... Please help! |
|
© all rights reserved. photographs, images and content are copyright of their photographers