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Re: Bit noise in JPEG images



When I looked at these, I see a smooth gradient with no imperfections at
all. What does the bit noise that you see look like?

I have a G4 dual 1.25 with the 128MB Nvidia card...

Latest version of Jaguar

On 12/16/03 1:13 PM, "Heinrich Beck" <email@hidden> wrote:

> Hola!
> 
> I've created some images using gradients, and when I open them with
> Quicktime (latest and greatest version), I get a lot of "bit noise".
> 
> A sample of these images are at:
> 
> http://www.iheinrich.com/noise/grad.jpg
> http://www.iheinrich.com/noise/grad.tif   (warning: big file)
> http://www.iheinrich.com/noise/RedBlue.jpg
> 
> I've tested this on two machines, (G4 and G5, both with Panther) with
> multiple displays, and they all show bit noise.
> 
> I've calibrated all the monitors.
> 
> When I open them with Quicktime for Windows, I do not get bit noise.
> 
> Is this a bug in Quicktime?
> 
> All the best,
> 
> Heinrich H. Beck ベック
> Software Quality Control Engineer
> Nikon, Inc / Electronic Imaging QC
> 1300 Walt Whitman Road
> Melville, NY 11747          USA
> 
> phone 631-547-4004
> mailto:email@hidden
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References: 
 >Bit noise in JPEG images (From: Heinrich Beck <email@hidden>)



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