Moire problems

10s

10s

Veteran
I've been trying to reduce Moire Problems while using 24P. I've been trying Thin vs.Thick, detail on /off, etc... & it appears to me Thick with detail off reduces significantly Moire problems much better than Thin. Maybe my monitor, camera LCD & Laptop are causing this. I don't know. Slow pans & tilits are really bad sometimes, while faster speeds over these problem areas solve the issue.

I'm running the camera directly into my laptop using DV Rack so I think I'm getting a fairly accurate quality full screen image.  I've turned detail all the way down...this should be the worst resolution but it looks better to me for overall filming in some of these shots than Thin.

Anyone else play with this sort of thing & what results have you had & remedies?
 
Re: Moire problems

Yes, a slight out of focus can cure it & post would be a nice place to selectively alter it. Thanks :)
 
Re: Moire problems

Is this that weird thing that happens when you shoot a lot of thin vertical parallel lines, like venetian blinds?
 
Re: Moire problems

Yes, it causes all sorts of visual distortion. Thick settings overcome many of these cases better than thin. It's best to avoid materials that produce this effect.
 
Re: Moire problems

SO, if I need to shoot a scene that has blinds in the background, and switch to thick to avoid the moire pattern, will switching back to thin in the next scene look that different? WIll it be so noticeable as to be disturbing?
 
Re: Moire problems

For that you need to TEST ahead of time. It would be best to avoid the blinds or play with them to reduce the moire. There are no easy answers I'm aware of.
 
Re: Moire problems

What are your codec settings? I sometimes have to switch codecs if I run into areas of the footage that have moire problems. It will often eliminate the problem altogether.

For example, working with a DV codec but switching it to Photo JPEG or Motion JPEGA before printing to tape or exporting it out for DVD burning.
 
Re: Moire problems

Sure, confuse me more ;D

My example of the blinds was theoretical. I just had some problems on my last shoot. I'll avoid them whenever possible, but when I can't...
 
Re: Moire problems

According to the people at DVFilm. You should use thin primarily if you are going to do a transfer to film. Using thick is okay if it is going to dvd. I try to avoid blinds and thin horizontal edges in most shots. Take the blinds down and put up some shades or cover the blinds with fabric/drapes, plants whatever, but overall try to avoid them.
 
Re: Moire problems

Good point, when you have saved a minimum of $22,000 (many places are around $40,000) for a 90 min. film out use thin. :o lotta money huh!
 
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