Message-Id: <199702120215.TAA33946@dns.ccit.arizona.edu> Date: Tue, 11 Feb 1997 17:42:56 -0600 From: George Holmes <mailto:george.holmes@MAIL.UTEXAS.EDU> Subject: Re: Washed out scans To: mailto:IMAGELIB@LISTSERV.ARIZONA.EDU
According to the Photoshop User Guide (manual) click the triangle at the bottom left border of the document window and choose Document sizes from the menu. The file size values appear in the box at the lower left corner of the document window. The first value indicates the file size of the final document as it would be sent to the printer, a flattened file which contains no layer data. The second value shows the size of the file including all layers and channels, that is, the file size if the document were saved with all it's layers.If you choose scratch sizes the left number shows how much RAM Photoshop is using for all open images including information on the clipboard. The right number shows the total amount of RAM available to Photoshop; this number should be equal to the amount of memory allocated to Photoshop minua the amount that Photoshop needs to run (1-2 MB on a non-Power Mac, and 6-7 MB on a Power Mac). It's been my experience that one will require a lot more than that (30-60 MB). When the left number exceeds the right number, no more RAM is available; Photoshop must use the scratch disk for additional memory, and the program's performance may decline.
I've read that you need to keep free an amount of hard drive/scratch disk memory at least 2-3 times the size of your file/document.
I hope this helps clear things up.
>> Occasionally images
>>scanned have a washed out look - the information is just not there.
>>We scan into Photoshop and the only consistent piece of information
>>that we can ascertain that indicates it is a problem with the
>>scanned file and not the original is that in the bottom left corner
>>of the Photoshop screen the right hand figure of the "layers" file
>>size information is always lower than the left, whereas a good image
>>gives both sizes the same...
>
>>We can place the image at different locations on the
>>scanner bed, physically rotate it, switch the computer and scanner
>>off for half an hour and still the problem occurs
>
>>Does anyone have an e-mail contact address for Umax - they're very
>>shy of giving this on their Web site?
>>
>>Any suggestions?
>>...
>>Helen Page, Multimedia Co-ordinator
>>State Library of Victoria, 328 Swanston Street,
>>Melbourne, Vic 3000 AUSTRALIA
>
>It's difficult to ascertain the problem without seeing the scans. From
>what you've described, it's difficult to tell if it's a software,
>firmware, or hardware problem. If it were the scanner itself, you would
>likely see it washed out all the time or in a certain portion of the
>image. Keep in mind that "autoadjust" settings on scanners in general are
>not flawless. It's much like an auto exposure meter on a camera. They'll
>do a good job 90% of the time but might fail with difficult subjects.
>However, if it starts washing out images after it heats up, that would
>indicate a potential hardware problem.
>
>My only suggestion is to show samples to a local scanner expert and/or
>Umax. I'll pass along some phone numbers, but they are for the U.S. (510)
>651-8883, BBS: (510) 651-2550.
>
>Regards,
>
>Joel Wolfson
>Calumet Digital Systems
>Phone: (520) 526-3726
>E-mail: mailto:digiwolf@infomagic.com
George Holmes, MSGT/USAF-Ret Archer M Huntington Art Gallery The University of Texas 23rd and San Jacinto St Austin, Tx 78712-1205 Photographer-Site Designer Ph# 512.471.9194 Fax# 512.471.7023 http://www.utexas.edu/cofa/hag ***********************I will not tolerate intolerance********************