Ron, everything that I've read about PNG format is that it is fully lossless. I'm hoping that is true because that is the main format that I use for all my photographs. One of the discussion links is http://www.libpng.org/pub/png/pngintro.html, but even so I may have to look into TIFF from now on.
Larry On Wed, May 11, 2011 at 4:10 PM, Ron Ferguson <[email protected]> wrote: > Larry, > > The point is that a TIFF is lossless. What this means is that you can edit > the picture eg remove blemishes, alter colour balance etc. and then save > without any loss in picture quality. With other formats, including PNG, when > you save after editing then there is a quality reduction, and this is > accumulative, so the more times you do an edit and save then the greater the > loss in quality. With, say, a JPG the loss it not noticeable after only one > or two edit/saves but is often very obviously after more. The loss occurs on > saving, btw, not during the edit. > > Hence the recommendation to save the master as a TIFF and the files in use > as JPG, PNG GIF etc.. > > Ron Ferguson > http://www.fergys.co.uk/ > > -----Original Message----- > From: Larry McCumber > Sent: Wednesday, May 11, 2011 8:37 PM > To: [email protected] > Subject: Re: [LegacyUG] scanning photographs > > These specs were those also given in the seminar by Maureen Taylor on > the 14th. I never could find out why .tif format as opposed to .png > or some other loss-less format. I typically use .png, so I am > interested in why .tif. > > Larry > > On Wed, May 11, 2011 at 12:44 PM, Mike Fry <[email protected]> wrote: >> On 2011/05/11 17:32, Reba Solomon wrote: >>> To the best of what I could learn, when scanning photographs for >>> posterity, you >>> should be doing minimum of 600 dpi, 100% scale, always scan as a colored >>> photograph, and save as a .tif file. I'm not a photographer, so does >>> anyone >>> here have opinions or additions to this advice? >> >> This web site used to have some very good information on it. >> >> <http://www.scantips.com/> >> >> -- >> Regards, >> Mike Fry >> Johannesburg >> > > Legacy User Group guidelines: > http://www.LegacyFamilyTree.com/Etiquette.asp > Archived messages after Nov. 21 2009: > http://www.mail-archive.com/[email protected]/ > Archived messages from old mail server - before Nov. 21 2009: > http://www.mail-archive.com/[email protected]/ > Online technical support: http://www.LegacyFamilyTree.com/Help.asp > Follow Legacy on Facebook (http://www.facebook.com/LegacyFamilyTree) and on > our blog (http://news.LegacyFamilyTree.com). > To unsubscribe: http://www.LegacyFamilyTree.com/LegacyLists.asp > Legacy User Group guidelines: http://www.LegacyFamilyTree.com/Etiquette.asp Archived messages after Nov. 21 2009: http://www.mail-archive.com/[email protected]/ Archived messages from old mail server - before Nov. 21 2009: http://www.mail-archive.com/[email protected]/ Online technical support: http://www.LegacyFamilyTree.com/Help.asp Follow Legacy on Facebook (http://www.facebook.com/LegacyFamilyTree) and on our blog (http://news.LegacyFamilyTree.com). To unsubscribe: http://www.LegacyFamilyTree.com/LegacyLists.asp
