----- Original Message ----- From: "Kenneth Waller" Subject: Re: Digital Imaging, File Formats, and Color
> Response below > ----- Original Message ----- > From: <[EMAIL PROTECTED]> > Subject: Digital Imaging, File Formats, and Color > > > > > 1) Which file format, in what type of compression, in what color space (or > photometric interpretation) is the best for archiving and printing (not web > use)? > > Brent, > Jpeg is somewhat misunderstood. It is a lossy compression, but losses only > occur when the file is saved. > So, you've just captured the award winning image you've always wanted. You > photoshop it to your liking and save as your "master" in jpeg format (here's > where the losses occur). You now want to print it, you open it up and print > (no additional losses here). If you don't save changes to the file you just > printed, and simply close out it out, no further losses to your "master" > occurs. > It's the resaving that causes additional losses. > In some instances I have resaved after opening but have yet to see this lead > to a noticeably degraded image. I may be mistaken, but I believe that JPEG only supports 8 bit (256 colours) colour, which is kinda limited. I'm saving my stuff as however it comes off the camera, usually RAW, so that I will have access to the full colour gamut that the camera shoots, or as 16 bit tiff. I am not overly worried about not being able to read this stuff in the future, I figure I have the software now, I can't see that changing anytime soon. William Robb
