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[OM] Re: Noise reduction

Subject: [OM] Re: Noise reduction
From: Chuck Norcutt <chucknorcutt@xxxxxxxxxxxxxxxx>
Date: Fri, 08 Dec 2006 08:08:26 -0500
I meant to suggest that you should check the help file for mention of 
EXIF.  You may find that preserving EXIF is an option.  I never paid any 
attention to that since I was only cleaning up film scans which had no 
EXIF data.

Chuck Norcutt

Chuck Norcutt wrote:

> Check the dimensions of the image.  You'll probably find the number of 
> pixels is still the same.  My guess is that by reducing the amount of 
> noise you've reduced the information content of the image and a JPEG 
> compression can be more efficient.
> 
> Chuck Norcutt
> 
> Stuart Robinson wrote:
> 
> 
>>Amazing. In the half  hour since you posted this, I've downloaded Neat 
>>Image & had a play with one image. The difference is remarkable! One 
>>thing though & I don't know if this happens on the full version is, my 
>>original image was 3.44MB after filtering it became 1.06MB. It also 
>>loses it's exif data, that's easy to get around by backing it up first 
>>with Exifer. Why though has the file shrunk?
>>
>>Stu
>>
>>Chuck Norcutt wrote:
>>
>>
>>>I think the two major contenders are Neat Image and Noise Ninja.  These 
>>>reviews are a couple of years old and I would suspect that, 
>>>technologically, they're probably equal.  At the time of the reviews 
>>>both were only available as stand alones but I would guess they're 
>>>probably available as PS plug-ins by now.
>>>
>>>I have old, freebie versions of both and I preferred Neat Image but I 
>>>haven't done any serious film scanning in a long time which is where it 
>>>was really needed.  VueScan incorporates grain/noise reduction in its 
>>>filter menu but I've never used that part of VueScan since it was added. 
>>> I keep the Min*lta A1 at ISO 100 95% of the time so there is really no 
>>>need for noise reduction there.  I've taken a few ISO 3200 shots with 
>>>the 5D but have never had to print anything large taken at that speed 
>>>and haven't been driven to clean any images.
>>>
>>><http://www.luminous-landscape.com/reviews/software/noise-ninja.shtml>
>>><http://www.luminous-landscape.com/reviews/software/neatimage.shtml>
>>>
>>>Fred Miranda also has noise reduction plug-in software that works on 
>>>scanned film or JPEGs or raw files right out of the camera for only $20. 
>>> Sounds useful and inexpensive but I don't know anything else about it.
>>><http://www.fredmiranda.com/shopping/Xpro>
>>>
>>>Picture Window Pro also has noise reduction as part of the "advanced 
>>>sharpen" function but I've never use the noise reduction part.
>>>
>>>Chuck Norcutt
>>>
>>>
>>>
>>>Phil wrote:
>>>
>>> 
>>>
>>>
>>>>Do any you guys have any experience with noise reduction programs
>>>>Would appreciate any guidance
>>>>
>>>>Thanks
>>>>
>>>>Phil
>>>>
>>>>
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>>
>>
>>
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> 
> 
> 
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