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Frustration with the Moire effect
I know this topic has been addressed a number of times here, but I am still having trouble getting rid of the Moire effect when panning or zooming still pictures. I can see it happening when I do either SD or HD video, but it’s far more pronounced in SD.
I have followed the advice from this forum and resized my pictures to about 2x the size (1440×960 for SD). However, in many cases I STILL get some flicker happening (although it is usually lessened). Now, I have tried resizing all the way down to exactly 720×480 and yes, the Moire effect is greatly diminished and sometimes almost eliminated…BUT, any zooming causes the picture quality to suffer (which seems to defeat the whole purpose of taking high quality photos).
So, if I don’t resize to 720×480 I get a pronounced Moire effect, and if I do resize then I lose image quality during a zoom.
Is it not possible to have it both ways? I remember reading a response from one of the moderators who said he was able to get pristine quality every time…how?
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9 Replies
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First, make sure that you have Reduce Interlace Flicker enabled on the events in question. This will help. If that doesn’t eliminate the problem, try a Gaussian Blur, vertical only, about 0.002. This will slightly blur any horizontal lines that may the causing the problem.
~jr
http://www.johnrofrano.com
http://www.vasst.com -
Thanks John,
I did try both your suggestions. With the “Reduce Interlace Flicker” I couldn’t really tell any difference. But the Gaussian blur did make the flickering much less noticeable.
However, it also caused the clarity and sharpness of the picture to be sacrificed. Which is worse: Moire effect or fuzzy picture?
I’m now starting to wonder if perhaps I’m being too picky. Maybe there is an acceptable amount of Moire effect? I know I have seen it in professional video before…what is your opinion on that subject?
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Hello . I do a lots of still picture projects and do not suffer from this unless the content already has some very very fine details like leaves of trees, etc. Apart from the interlace switch, are you using JPG or PNG. I always use PNG. It is worth a try..
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I have used jpeg and png. However, usually I first edit the photos in Photoshop, so I just drop the Photoshop project files onto the timeline and Vegas uses them just fine.
I haven’t been able to detect any difference in quality between the different file types, honestly.
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Hello Maybe you can describe the Moire effect you are seeing so we can be sure we are trying to solve the right problem or even post one of the worst picture thats causes the problem so we can see if the same happens when duplicate on another system. I assume you are using Progessive settings for these pictures.. John
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[john bolton] “I assume you are using Progessive settings for these pictures”
That’s a good point. I do all of my photo montages as progressive so interlacing is usually not an issue. If I’m delivering on DVD, I’ll use a project setting of NTSC DV 24p Widescreen (720×480, 23.976 fps) and render to MainConcept MPEG2 with the DVD Architect 24p NTSC Widescreen video stream template. This has the added advantage of rendering quicker because it only produces 24fps instead of 30.
~jr
http://www.johnrofrano.com
http://www.vasst.com -
For me I always you a custom template 1024×576 PAL as I am in the UK. I have found in the past that the 720×576 widescreen template does cause some issues for me.
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Yes I always do progressive, as well, though I use 29.97 fps so the pans and zooms will be a bit smoother.
But as to the previous question, is there an acceptable amount of Moire effect? I assume so since I have seen it in professional video. Maybe I’m just being too picky; I do tend to be somewhat of a perfectionist. What is your opinion, J.F.?
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[Brian Tallant] “But as to the previous question, is there an acceptable amount of Moire effect?”
I’ve seen it as well on some broadcast videos. You can’t improve past the limitations of the technology. Thin lines and interlacing simply don’t mix and at some point you have to concede that you have done all that you can and the rest is just a limitation you have to live with.
~jr
http://www.johnrofrano.com
http://www.vasst.com
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