differences between convolution3d and nomosmooth

[onesoul]

Hi everyone, not being very experimented with these filters I would like to know your ideas about the more appropriate occasions to use either of them.
For example I tried convolution3d on a anime DVD "The emperor's new groove" with animehq preset with good results removing temporal noise. Would nomosmooth do a better job?

Another question of a curious mind: which of these filters would you recomend when using a dv source?

Please bear with me with this last question: would you recomend using a sharpening filter after using convolution3d or nomosmooth? If so which would you recomend?

Sincerely,
onesoul

[onesoul]

Ok, first of all I admit I am a n00b...

Any thoughts? Please... edit: hello?

[jorel]

Originally posted by onesoul
Hi everyone, not being very experimented with these filters I would like to know your ideas about the more appropriate occasions to use either of them.
For example I tried convolution3d on a anime DVD "The emperor's new groove" with animehq preset with good results removing temporal noise. Would nomosmooth do a better job?

Another question of a curious mind: which of these filters would you recomend when using a dv source?

Please bear with me with this last question: would you recomend using a sharpening filter after using convolution3d or nomosmooth? If so which would you recomend?

Sincerely,
onesoul

i'm a newby,but try many scripts...

;)
convolution3d is good.
Sansgrip makes nomosmooth and fluxsmooth.
i think that fluxsmooth is better!
about sharping filter:
using before : less sharp
using after : more sharp
blockbuster, unfilter and focus2 : sharping very fine!
;) make some tests...

[scmccarthy]

onesoul -

You have to go with what you like. You already said you liked the result that convolution3d gave you. convolution is considered a good filter. No one would recommend something else unless the results were less than satisfactory for you. I recommend trying another preset on another movie and see how that one turns out. Until you give yourself a chance to really know what one filter can do, comparisons to other filters will mean very little.

Stephen

[onesoul]

Thank you for your responses.
Ok, I guess I have to experiment more with filters.

[scmccarthy]

And when you gain experience, your questions will be more specific. Then we can recommend other filters without trashing the filter your using, because we can say a certain filter is better for your specific needs. Part of the etiquette of the forum is to be specific, rather than make generalizations.

Stephen

[SansGrip]

Originally posted by onesoul
For example I tried convolution3d on a anime DVD "The emperor's new groove" with animehq preset with good results removing temporal noise. Would nomosmooth do a better job?


As others have said, the "best" filter to use depends on the circumstances. I'd be interested to hear from anyone using NoMo or Flux on anime, as I've never tried it.

But to answer your question regarding the difference between C3D and NoMo:

Convolution3D applies a simple weighted average to each pixel using both immediate spatial and temporal neighbours, thus the pixel currently being processed is smoothed with 26 others.

NoMoSmooth applies a simple non-weighted average to each pixel, but tries to reduce motion artifacts by using temporal smoothing on static areas and spatial smoothing on areas in motion. Because the motion-detection algorithm it uses is quite unsophisticated, it can introduce artifacts of its own when similarly coloured objects are moving over each other.

[onesoul]

@SansGrip

Thank you for your response. A good programer and a good teacher you are :)

Respecting to the encoded anime I mentioned, although I said that convolution3d did a good job removing temporal noise, it didn't do so great at particularly scenes such as flashing lightning, appearing massive blocks over the picture especially at the objective (a lama which is the emperor). At some really fast zooming it leaves some graining.

I believe regarding what you said I might get better results using either nomosmooth or fluxsmooth, so I will give some tests and I'll get back at here.

[SansGrip]

Originally posted by onesoul
(a lama which is the emperor) Now what movie could that be? :D

I will give some tests and I'll get back at here. I'd be interested in hearing how well (or otherwise) Flux and NoMo work on animated material.

[onesoul]

Just to say that all these filters do a good job, but for the speed I'll use fluxsmooth as it produces similar results (if not better) than the others.

Not being to experimented, when reading the explanations of SansGrip's filters I like very much the premisses for those filtes and find them simple (I mean the premisses not the coding which I don't understand :)) but very appealing.

I must say I'm still testing.

[SansGrip]

Originally posted by onesoul
I must say I'm still testing. We all are :).

[onesoul]

:D