DV Up-Resing at DVinfo.net

Bruce Meyers · March 3rd, 2006, 07:51 AM

On the rare occasion when a dv/hdv/digital/sd/whatever piece of footage makes it into a main stream piece of cinema, mostly documentaries really, seems to me that say DV footage in this case is somehow uprezed from 720 x 480 to the film format, I know you can just up-rez things, but I was curious to know besides just blowing it straight up if there's a way to kind of refine the pixelization and somehow infuse it with more resolution, I heard of(never seen) software that will take a photo at low-rez and using some special algorithim enlarge it without doing pixelization, does this sort of thing exist for video? Please tell us, give us your thoughts on the matter.

Werner Wesp · March 4th, 2006, 07:07 AM

You are talking abou S-Spline. On some pictures that software works very well, on others it doesn't. Anyhow, remember this: the detail isn't there on tape, so you'll never get it! Some algorithms will just make a 'smoother' uprezzed image...

Robert M Wright · March 4th, 2006, 02:11 PM

There are several methods for resizing. Aside from spline, bicubic resizing is one of the better approaches for enlarging natural images.

Robert M Wright · March 4th, 2006, 02:15 PM

Actually, in theory at least, a series of frames can contain information that can be used to intelligently interpolate more detail into each of the frames. I don't think I've seen it done, but it certainly could be (might take a cray to do it!). That sort of thing would almost fall into the AI category.

Robert M Wright · March 4th, 2006, 02:20 PM

I'm sort of hoping to coax my Dad into taking a stab at a sort of AI approach to interpolating detail into the individual frames, by analyzing series of frames. He's a computer scientist from almost as far back as the stone age and studied AI most his life. I doubt he'll ever try to take it on though. He's retired now, in his early 70s.

Greg Boston · March 4th, 2006, 02:22 PM

Another popular application for uprezzing still photos is called Genuine Fractals. As the name implies, it uses fractal based calculations for uprezzing.

-gb-

Robert M Wright · March 4th, 2006, 03:46 PM

Are there any resize filters for Vegas available that use either spline of fractals?

March 3rd, 2006, 07:51 AM	#1
Bruce Meyers Regular Crew Join Date: Nov 2005 Location: Maldives Posts: 97	DV Up-Resing On the rare occasion when a dv/hdv/digital/sd/whatever piece of footage makes it into a main stream piece of cinema, mostly documentaries really, seems to me that say DV footage in this case is somehow uprezed from 720 x 480 to the film format, I know you can just up-rez things, but I was curious to know besides just blowing it straight up if there's a way to kind of refine the pixelization and somehow infuse it with more resolution, I heard of(never seen) software that will take a photo at low-rez and using some special algorithim enlarge it without doing pixelization, does this sort of thing exist for video? Please tell us, give us your thoughts on the matter.

March 4th, 2006, 07:07 AM	#2
Werner Wesp Major Player Join Date: Aug 2005 Location: Belgium Posts: 497	You are talking abou S-Spline. On some pictures that software works very well, on others it doesn't. Anyhow, remember this: the detail isn't there on tape, so you'll never get it! Some algorithms will just make a 'smoother' uprezzed image...

March 4th, 2006, 02:11 PM	#3
Robert M Wright Inner Circle Join Date: Jan 2006 Location: Minnesota (USA) Posts: 2,171	There are several methods for resizing. Aside from spline, bicubic resizing is one of the better approaches for enlarging natural images.

March 4th, 2006, 02:15 PM	#4
Robert M Wright Inner Circle Join Date: Jan 2006 Location: Minnesota (USA) Posts: 2,171	Actually, in theory at least, a series of frames can contain information that can be used to intelligently interpolate more detail into each of the frames. I don't think I've seen it done, but it certainly could be (might take a cray to do it!). That sort of thing would almost fall into the AI category.

March 4th, 2006, 02:20 PM	#5
Robert M Wright Inner Circle Join Date: Jan 2006 Location: Minnesota (USA) Posts: 2,171	I'm sort of hoping to coax my Dad into taking a stab at a sort of AI approach to interpolating detail into the individual frames, by analyzing series of frames. He's a computer scientist from almost as far back as the stone age and studied AI most his life. I doubt he'll ever try to take it on though. He's retired now, in his early 70s.

March 4th, 2006, 02:22 PM	#6
Greg Boston Wrangler Join Date: Oct 2003 Location: DFW area, TX Posts: 6,117 Images: 1	Another popular application for uprezzing still photos is called Genuine Fractals. As the name implies, it uses fractal based calculations for uprezzing. -gb-

March 4th, 2006, 03:46 PM	#7
Robert M Wright Inner Circle Join Date: Jan 2006 Location: Minnesota (USA) Posts: 2,171	Are there any resize filters for Vegas available that use either spline of fractals?