On Thu, Nov 24, 2005 at 04:15:21PM -0500, Kenneth Waller wrote: > >They scan as JPEGs and when opened the images are about 32mb in size. Now > >when I scan a 35mm slide on my Scan Dual IV as a TIFF I get a file around > >36mb > > Remember the JPEG is compressed. Depending on the amount of compression > chosen that JPEG had a lot more file size than 32mb. Open the JPEG, save to > TIFF and you'll see a much larger file size. > > You are not getting less info, just compressed info.
That would only be true if the JPEG compression were lossless. Unfortunately, it isn't, generally - you'll lose some information. The most obvious place to look will be around high-contrast edges (twigs, highlights, etc.) - you'll often see some colour blocking.
