I think there are some myths about jpg. tif. psd. and high quality printing
pictures.
We (printing company, myself and a medical company picture bank)
have done tests about saving pictures that later can used to print out on
high glossy paper.
All files are scanned in 350 ppi
We compared a tif file and a jpg file in level 7 ( Photoshop 5.0)
Proof printing 2 picture.
No one could se any difference in the 2 pictures in colors. A closer look
with magnifier glasses shows some differences in a small text.
We took the same jpg file and resaving it up to 5 times. We looked at each
step and where suppriced of the small changes of colors in the picture.
Example:
A well known medical newspaper printed on high glossy paper wants their
pictures files in Jpg level 5 .!!!!!!They must also have done some test
there jpg.5 level seems to suite there needs.
Conclusion:
This must means? that we photographers are "over do it " when we are
delivering pictures in big tif or psd files.
Mikael Risedal
Lund
Sweden
>From: "Laurie Solomon" <laurie@advancenet.net>
>Reply-To: filmscanners@halftone.co.uk
>To: <filmscanners@halftone.co.uk>
>Subject: RE: filmscanners: File format
>Date: Thu, 29 Mar 2001 22:47:54 -0600
>
>Only if you change the quality when resaving the .jpg file or if you
>resample the file in any way prior to resaving the .jpg file even at the
>same quality level. With .tif files, you will lose information only if you
>resample the file after opening it and before resaving it.
>
>-----Original Message-----
>From: owner-filmscanners@halftone.co.uk
>[mailto:owner-filmscanners@halftone.co.uk]On Behalf Of httin
>Sent: Thursday, March 29, 2001 7:49 PM
>To: filmscanners
>Subject: filmscanners: File format
>
>
>Did any one knows whether is there any informations/details loses when
>store in compressed JPG format in maximum quality 10 and while you keep
>opening and saving the same file many times?
>And how about the raw file TIFF?
>
>Thanks.
>HT Tin
>
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