Now right off the bat I will warn that I'm sure this is a stupid question but it's bothering me so I thought I would ask...
Usually, my photos right out of the camera end up with a pixel dimension something like: Width - 4592 / Height - 3056
When I began entering photos in competitions at the camera club I joined the rules were a pixel width of 1024. Now, I began to notice that reducing to a pixel width of 1024 ended up in a sharper photo... my photo would be ready to go and good and then I would do the 1024 resizing in PSE and.. sharper photo - not by a lot but just a touch sharper and visible to my eye. It seemed to bring in more detail. My resolution does not change - it's 72.
Why is this?