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Remove the noise before submitting your pictures

Author Message
Achilles
4451 posts
77
Message posted at 03/14/2004, 08:09:43 AM by Achilles - member is an admin
- Adjust levels, curves, color balance, brightness and contrast; do this first!



- Isolate the main noisy areas. Because the filters will soften the picture, therefore you need to apply it only on the areas that really need it.



- Use filters for removing noise : in photoshop you can use Dust and scratches, Blur, gaussian blur, despeckle, etc. Don't forget to read the tips with channels first.



- Sharpen - Sharpening is imperative most of the times because the image will become soft if a large amount of noise was initialy included (don't use excessive blur). Use unsharp mask most of the time, as low as possible to avoid reverting back some of the artifacts



- Resize and crop the image for better composition - decreasing the image size will remove some of the artifacts, although some resolution will be lost; if you do it carefuly it's a good compromise; because it will also soften the picture, a low amount of unsharp mask will be required after the image has been decreased



If this is too complicated or you're just not having the time go to Neat Image and choose your camera's profiles from their library

Other similar software programs:

Noise Ninja

Absolute DeNoiser


and the list can go on...


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Ronbloom
98 posts
Message posted at 03/22/2004, 18:00:41 PM by Ronbloom
I went to the site and read that it only saves as png. Is png lossless? So if I use this program and save the output as png will I get a degraded quality image after my final save to jpg?
sigma sd9, fuji s602z, Hp scanjet 7400c

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Gaffera
118 posts
Message posted at 03/23/2004, 09:16:34 AM by Gaffera
hi,



some pics were rejected. Lack of composition disqualifies this shot as a good stockphoto.



I do not know what is this, what can I do ? I have Photoshop 6.0 and I save my pics on maximum. ( 10 )



Anybody can help me ?



grazie



gaffera
CANON DS MARK ii, SONY DSC F 828, SONY DSC S 70

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Skiphunt
30 posts
Message posted at 03/23/2004, 18:16:15 PM by Skiphunt
png is nearly lossless. better than jpg and preferred over jpg... its just slow and the file sizes are much larger. It should work out well for you. Just do all your editing to the png version then save a high quality jpeg for upload.


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Skiphunt
30 posts
Message posted at 03/23/2004, 18:23:30 PM by Skiphunt
Also... if you have Photoshop CS and shoot RAW, it was some nice noise reduction tools upon import. For some reason those same tools don't seem to be available for non-RAW images and I've tried resaving as RAW and reimporting, but it only recognizes the RAW compression produced by the digicam. I shoot all RAW now, because I've tested shooting at ISOs at 800 and 1600 and with a little tweaking have managed to get nearly noise-free images right out of Photoshop CS. Only catch is that you have to be working with a RAW image shot that way.


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Achilles
4451 posts
77
Message posted at 03/24/2004, 03:02:01 AM by Achilles - member is an admin
Only catch is that you have to be working with a RAW image shot that way.



Shooting RAW is the right way to go if your camera allows it and the CF holds enough free space.

For those that are not aware by the RAW format, the only problem is that the file cannot be opened with any kind of graphics software and is a looot larger than JPG.


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Achilles
4451 posts
77
Message posted at 03/24/2004, 03:05:40 AM by Achilles - member is an admin
As said in the other thread many of the submissions we receive are containing a large amount of noise artifacts. Some designers may be pleased by the effect that a grainy picture has, but especially the noise added by digi cams disqualifies a shot from being a good stock.

In order to avoid having your image not being accepted please fix it first. This is good for your portfolio too, not only for submitting your files on Dreamstime.com



Here is a good reference to start with, explaing the channels and their role (Photoshop and Paint Shop Pro):

Photoshop and PSP Channels: What, When and Why? by Wendy Peck


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Achilles
4451 posts
77
Message posted at 03/24/2004, 03:05:40 AM by Achilles - member is an admin
Hi Gaffera,



That reason was not reffering to the noise, it was the way you put the subject in your frame.

You have to save at 12 quality from Photoshop, 10 is not enough.


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Gaffera
118 posts
Message posted at 05/11/2004, 16:41:09 PM by Gaffera
12 I didn't know that exists, now I found it out. It's the same with my nice duck which was rejected today? I cannot see noises.
CANON DS MARK ii, SONY DSC F 828, SONY DSC S 70

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Achilles
4451 posts
77
Message posted at 05/12/2004, 01:28:38 AM by Achilles - member is an admin
Please email the question to support mentioning the images you're reffering to.


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Melking
527 posts
72
Message posted at 05/12/2004, 06:55:52 AM by Melking
So you should shoot in RAW format, well I will have to try that, I have a 256MB card for my camera...it that enough? or did I need more!



Canon 1Ds Mark III (21.1MP) & Canon 20D (8 MP...

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Achilles
4451 posts
77
Message posted at 05/12/2004, 07:54:02 AM by Achilles - member is an admin
RAW format is always better. 256 MB CF should be enough for a few shots, but will not give you a huge freedom. Also the time for writing the file will be significantly higher because of the file size.

Shooting RAW is better but not noise free, if you shoot at high ISO a prosumer camera will always bring some noise.


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Melking
527 posts
72
Message posted at 05/12/2004, 10:07:50 AM by Melking
I looked on my Camera SONY F717 and I only have JPG or TIFF...Is TIFF = RAW?

Canon 1Ds Mark III (21.1MP) & Canon 20D (8 MP...

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Philippe
3 posts
<10
Message posted at 05/12/2004, 13:20:16 PM by Philippe
"Use filters for removing noise : in photoshop you can... ...Don't forget to read the tips with channels first"



Where do i find these tips?



Thanks you!



OK... FOUND IT!





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Achilles
4451 posts
77
Message posted at 05/12/2004, 13:30:49 PM by Achilles - member is an admin
You're right, Sony 717 delivers the images as Tiff or JPEG, no RAW format.

But Tiff provides a better quality than JPG, although you can upload only JPGs here, so it's the same thing from this point of view.

Tiff and RAW are different formats indeed. RAW is the data that the CCD sees without any processing from the camera. This allows you to change setting as WB, color correction, easily later. Read more about RAW here


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Melking
527 posts
72
Message posted at 05/12/2004, 14:19:28 PM by Melking
Thanks very much for that information....I will go read more...thanks
Canon 1Ds Mark III (21.1MP) & Canon 20D (8 MP...

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Gaffera
118 posts
Message posted at 05/13/2004, 08:17:28 AM by Gaffera
Hi, please send me your e-mal address so I will send you the pic.

Thanks, gaffera
CANON DS MARK ii, SONY DSC F 828, SONY DSC S 70

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Achilles
4451 posts
77
Message posted at 05/13/2004, 10:21:08 AM by Achilles - member is an admin
Gaffera the email is support (a) dreamstime (dot) com

Replace () with the adequate characters.


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Gaffera
118 posts
Message posted at 05/13/2004, 12:22:43 PM by Gaffera
ok, thanks, I will send you the pic. gaffera
CANON DS MARK ii, SONY DSC F 828, SONY DSC S 70

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Katlyn
4 posts
Message posted at 05/31/2004, 11:02:37 AM by Katlyn
I can not see the noise in some of my pictures that were rejected. How can you tell which photo needs noise remove?
Canon Power Shot SX260 HS

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