4:4:4 12-bit Uncompressed DVX100

Peter Plevritis · May 2nd, 2004, 08:56 PM

Fantastic!

High-color saturated images.
High-luma contrast images.

Overexposed scene. Fill up a room with as much light as you have.

And to make it really cool to compare, the DV versions.

Don't remember if this was ever asked. This will all work at 24P, 24PA, 30P, and 60i? How does it handle this sampling rate?

Juan P. Pertierra · May 2nd, 2004, 08:58 PM

Peter, in the process of putting some test frames together. Will have to wait until tomrrow to take some outdoor shots, but for now i'm just re-taking the last shot i posted without the speckles.

Yes, it will work on every mode, although there is no difference between 24P and 24PA at the RAW level, because there is no pull up/down whatsoever. you get the actual 24/30 frames.

Juan

Juan P. Pertierra · May 2nd, 2004, 09:14 PM

Here's a quick and dirty(not any more) frame. It's very dark, and i'm so happy i got rid of the speckles i can't color-correct straight...so i just uploaded a PSD file with the raw R,G,B layers for you to color correct(align?) at will:

http://expert.cc.purdue.edu/~pertierr/cap7_RAW.psd

Next, i'm gonna try some different lighting and up-rezing....

If anyone was trying to download the .RAW film strips for the 3-second clip, i apologize because i went over quota and had to remove them. I will put together a clean clip with no dummy pixels...

Juan

Mark Grgurev · May 2nd, 2004, 09:35 PM

Why are the frames your posting tilted?

Juan P. Pertierra · May 2nd, 2004, 09:37 PM

Because the camera casing is still open, and that is the position that puts less stress on a flex cable which units the main body to the LCD half-shell.

Peter Plevritis · May 2nd, 2004, 09:44 PM

Very clean image. There still are some speckles though. Not many, just a few. Must still be some noise in the lines.

Mark Grgurev · May 2nd, 2004, 09:45 PM

So, once its closed you can post some images that are right-side-up?

Juan P. Pertierra · May 2nd, 2004, 09:46 PM

Yeah, i forgot to note...since radio shack was closed, i had to borrow a couple of capacitors from my lab and I just grabbed a couple of random capacitances...

There is so much I can do with the few i have, so this is the closest i can get. I need a capacitor a bit smaller than this to get rid of all of it, but i'll get it tomorrow.

Juan P. Pertierra · May 2nd, 2004, 09:49 PM

Mark,

Yes, and actually i'm going to try one right side up tomorrow if I can get it to sit right.

I figured the angle wouldn't be a problem for assessing the color and clarity of the image...

John Alton Disciple · May 2nd, 2004, 10:04 PM

Fantastic Juan! I've been following this thread very closely. What impressed me most about your last image (the noiseless one) was the latitude it had for correction. I've had to master a lot of footage over the years and this grab was impressively forgiving when correcting for levels and white balance.

Count me in for a mod as well! I trust you'll keep it reasonable =)

John Cabrera · May 2nd, 2004, 10:06 PM

If you can get it upright (or even if you can't) it would be great if you could shoot a few different test charts. I'm particularly interested in the gain in resolution that seems pretty obvious by this image and the test HD upres I did of it. If I remember Scott's book correctly, he compared two images side by side of that focus chart... one that was after DV compression and one if a person could "hypothetically" pull the image straight off the chip. Looks like he's gonna have to put out a 3rd edition, huh? Anyway, the book has some sample color charts, (and that focus chart could give us an idea of resolution if you can't find a more detailed pro chart). Record it to DV tape to so we can see the difference.

John

Juan P. Pertierra · May 2nd, 2004, 11:13 PM

This is my first try and very bad, but i decided to post it anyway since i need to go back to studying.

I'm having a lot of trouble focusing with the tiny DV viewfinder. Even a small change is evident in the RAW R,G,B frames, but until i build a method for pre-viewing the raw footage in real time this will have to do.

The frames are unaligned in adition to being slightly off focus and the rez chart is not perfectly aligned since I can't see the entire frame of the CCD in the viewfinder...

http://expert.cc.purdue.edu/~pertierr/rez_RAW.psd

And yes, those few red speckles will be gone tomorrow when i find the right cap size. :)

Capra Mauro · May 3rd, 2004, 04:56 AM

TKS Juan,
it's time to change skin and to become one ...Viper!

John Cabrera · May 3rd, 2004, 05:47 AM

If you capture 3 seconds worth of frames while you slowly attempt to focus, you should be able to find the frame in your sequence that is most in focus. Its probably only four or five focus points in question, so just focus slowly through them on the viewfinder.

John

Juan P. Pertierra · May 3rd, 2004, 05:15 PM

Outdoor shot, very dark because it was with ND2 on. completely RAW in photoshop format...push the levels/curves hard, the info is there :)

http://expert.cc.purdue.edu/~pertierr/leaves_RAW.psd

I've got DV counterparts of all this, in the process of transferring all the stuff...

May 2nd, 2004, 10:06 PM	#461
John Cabrera Regular Crew Join Date: Apr 2004 Location: California Posts: 67	Test Chart If you can get it upright (or even if you can't) it would be great if you could shoot a few different test charts. I'm particularly interested in the gain in resolution that seems pretty obvious by this image and the test HD upres I did of it. If I remember Scott's book correctly, he compared two images side by side of that focus chart... one that was after DV compression and one if a person could "hypothetically" pull the image straight off the chip. Looks like he's gonna have to put out a 3rd edition, huh? Anyway, the book has some sample color charts, (and that focus chart could give us an idea of resolution if you can't find a more detailed pro chart). Record it to DV tape to so we can see the difference. John

May 3rd, 2004, 05:47 AM	#464
John Cabrera Regular Crew Join Date: Apr 2004 Location: California Posts: 67	Focus If you capture 3 seconds worth of frames while you slowly attempt to focus, you should be able to find the frame in your sequence that is most in focus. Its probably only four or five focus points in question, so just focus slowly through them on the viewfinder. John

May 2nd, 2004, 08:56 PM	#451
Peter Plevritis Regular Crew Join Date: Mar 2004 Posts: 27	Fantastic! High-color saturated images. High-luma contrast images. Overexposed scene. Fill up a room with as much light as you have. And to make it really cool to compare, the DV versions. Don't remember if this was ever asked. This will all work at 24P, 24PA, 30P, and 60i? How does it handle this sampling rate?

May 2nd, 2004, 08:58 PM	#452
Juan P. Pertierra Major Player Join Date: Jul 2003 Posts: 479	Peter, in the process of putting some test frames together. Will have to wait until tomrrow to take some outdoor shots, but for now i'm just re-taking the last shot i posted without the speckles. Yes, it will work on every mode, although there is no difference between 24P and 24PA at the RAW level, because there is no pull up/down whatsoever. you get the actual 24/30 frames. Juan

May 2nd, 2004, 09:14 PM	#453
Juan P. Pertierra Major Player Join Date: Jul 2003 Posts: 479	Here's a quick and dirty(not any more) frame. It's very dark, and i'm so happy i got rid of the speckles i can't color-correct straight...so i just uploaded a PSD file with the raw R,G,B layers for you to color correct(align?) at will: http://expert.cc.purdue.edu/~pertierr/cap7_RAW.psd Next, i'm gonna try some different lighting and up-rezing.... If anyone was trying to download the .RAW film strips for the 3-second clip, i apologize because i went over quota and had to remove them. I will put together a clean clip with no dummy pixels... Juan

May 2nd, 2004, 09:35 PM	#454
Mark Grgurev Regular Crew Join Date: Dec 2003 Location: Fairview,nj Posts: 137	Why are the frames your posting tilted?

May 2nd, 2004, 09:37 PM	#455
Juan P. Pertierra Major Player Join Date: Jul 2003 Posts: 479	Because the camera casing is still open, and that is the position that puts less stress on a flex cable which units the main body to the LCD half-shell.

May 2nd, 2004, 09:44 PM	#456
Peter Plevritis Regular Crew Join Date: Mar 2004 Posts: 27	Very clean image. There still are some speckles though. Not many, just a few. Must still be some noise in the lines.

May 2nd, 2004, 09:45 PM	#457
Mark Grgurev Regular Crew Join Date: Dec 2003 Location: Fairview,nj Posts: 137	So, once its closed you can post some images that are right-side-up?

May 2nd, 2004, 09:46 PM	#458
Juan P. Pertierra Major Player Join Date: Jul 2003 Posts: 479	Yeah, i forgot to note...since radio shack was closed, i had to borrow a couple of capacitors from my lab and I just grabbed a couple of random capacitances... There is so much I can do with the few i have, so this is the closest i can get. I need a capacitor a bit smaller than this to get rid of all of it, but i'll get it tomorrow.

May 2nd, 2004, 09:49 PM	#459
Juan P. Pertierra Major Player Join Date: Jul 2003 Posts: 479	Mark, Yes, and actually i'm going to try one right side up tomorrow if I can get it to sit right. I figured the angle wouldn't be a problem for assessing the color and clarity of the image...

May 2nd, 2004, 10:04 PM	#460
John Alton Disciple New Boot Join Date: Jan 2003 Location: El Paso TX Posts: 14	Fantastic Juan! I've been following this thread very closely. What impressed me most about your last image (the noiseless one) was the latitude it had for correction. I've had to master a lot of footage over the years and this grab was impressively forgiving when correcting for levels and white balance. Count me in for a mod as well! I trust you'll keep it reasonable =)

May 2nd, 2004, 11:13 PM	#462
Juan P. Pertierra Major Player Join Date: Jul 2003 Posts: 479	This is my first try and very bad, but i decided to post it anyway since i need to go back to studying. I'm having a lot of trouble focusing with the tiny DV viewfinder. Even a small change is evident in the RAW R,G,B frames, but until i build a method for pre-viewing the raw footage in real time this will have to do. The frames are unaligned in adition to being slightly off focus and the rez chart is not perfectly aligned since I can't see the entire frame of the CCD in the viewfinder... http://expert.cc.purdue.edu/~pertierr/rez_RAW.psd And yes, those few red speckles will be gone tomorrow when i find the right cap size. :)

May 3rd, 2004, 04:56 AM	#463
Capra Mauro Tourist Join Date: Jan 2004 Location: Asti - Italy Posts: 4	TKS Juan, it's time to change skin and to become one ...Viper!

May 3rd, 2004, 05:15 PM	#465
Juan P. Pertierra Major Player Join Date: Jul 2003 Posts: 479	Outdoor shot, very dark because it was with ND2 on. completely RAW in photoshop format...push the levels/curves hard, the info is there :) http://expert.cc.purdue.edu/~pertierr/leaves_RAW.psd I've got DV counterparts of all this, in the process of transferring all the stuff...