Best Image -- Image Size vs Compression

I do not understand the terminology. Regardless, my images are all
scanned from slides and edited in Photoshop.

(George Preddy) wrote in message . com...
(john chapman) wrote in message . com...
1100 at 11 572KB

Why not downsize to the resolution of the media first? In general,
you can downsize a Bayer image (most cameras) to 25% of the original
area with no optical loss whatsoever, since they are all digitally
upscaled 400% as output (they have an interpolated value inserted
between all their measured values, by a computer, after the shutter
closes).