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-   -   "stair stepping" (http://www.dvinfo.net/forum/open-dv-discussion/3353-stair-stepping.html)

Frank Granovski August 24th, 2002 03:02 AM

"stair stepping"
 
Stair stepping..., I know what it is, but I am unable to get it to see what it looks like. Any suggestions?

Jeff Donald August 24th, 2002 04:30 AM

What camera are you using, Frank? If it has a sharpness control, try adjusting it. It can sometimes mask the edges. High contrast scenes are your best bet. I get them everytime I shoot a bird on a telephone wire, that is against a white sky or is somewhat back lit. On my product shots I get them on the edges of knives, forks and spoons. What are you using to view the footage? If I turn the sharpness, detail way down the edges will smooth out and you loose the stair stepping.

Jeff

Frank Granovski August 24th, 2002 05:24 AM

Thanks. I've tried the bird on the wire thing. I'll try it again, though. I have the DVL9500s and MX300s.

Don't get me wrong here. I'm trying to get stair stepping so that I can see what it looks like on my cams.

Don Donatello August 24th, 2002 04:17 PM

stair stepping is seen on a line ( edge of object) that runs at a angle ( like a 45% angle ) in your frame .... if you move in ( zoom in with editing software) the line will NOT be straight - it will look like the side view of STAIRS ( the kind you walk up/down = stair stepping) ..also you can see it easy in a CIRCLE.

the bird on wire will work, just make sure you compose the frame so the wire is running at a 45% angle in the frame NOT a 180% horizontal or 90% vertical ....

Frank Granovski August 24th, 2002 09:50 PM

Thanks. I'll try this tomorrow, and play it back on my TV, via AV-out. The reason why I want to do this is so that I can avoid stair stepping when I do some serious shooting. So far, I've been lucky.

Rob Lohman August 26th, 2002 02:05 AM

Frank, I think you'd be better off to watch the footage on a high
resolution monitor or on your NLE editing system. TV has a
tendency to more mask such issues. A monitor tends too be much
sharper (especially LCD screens, for example the one on my laptop)

Frank Granovski August 26th, 2002 02:23 AM

Thanks. Today I did try to get this, but couldn't see any S.S. I'll have to pop the tapes in my buddy's portable Sony deck tomorrow.


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