Still Image Interlacing (Search did not solve my issue)

Question

As I stated in the topic title, the search items for (still image interlacing) did not help with my problem. I'm trying to animate a bunch of stills for a slide show. The one thing I read over and over was that the pictures should be bigger than the viewer size in FCE.
I'm set for NTSC DV so 720 x 480, and the pictures are in the thousand pixel range (something like 2000 x 3000, high quality photos). I still get the interlacing. I read Tom Wolsky's FCP book entry however it did not help with the interlacing issue. If I do a batch edit in photoshop and change all the pictures to 720 x 480, would this solve the issue? I'm sure many of you have had this problem before, as I have, please let me know what you did.
what confuses me most is that it only happens with some pictures. I duplicated the animation and all the pictures are from the same camera, same SD chip and same size so I'm truly baffled by this. Please help me out, thanks.

Answer 1

It's true that stills should be bigger than the video format,
if you are moving them around and resizing them.
That won't affect the interlacing, but at least you won't
see the pixels from the still.
While doing motion and resizing, however, it's usually best to work
in a progressive format. In fact, it would be best if you
could stay progressive to the end. What format will
your final master be?
If your final deliverable is supposed to be interlaced,
you will usually see interlacing artifacts on a computer. But that's
not necessarily bad. When played on a regular analog TV,
the interlacing will function correctly and you won't notice it.
Are you really producing something for NTSC analog TV?