4:4:4 10bit single CMOS HD project - Page 42 at DVinfo.net

Go Back   DV Info Net > Special Interest Areas > Alternative Imaging Methods

Alternative Imaging Methods
DV Info Net is the birthplace of all 35mm adapters.


Closed Thread
 
Thread Tools Search this Thread
Old July 9th, 2004, 02:24 PM   #616
Trustee
 
Join Date: Jan 2003
Location: Wilmington NC
Posts: 1,414
it's not my personal goal - I can't stand interlaced images - but people pay money for it - money talks


uploading the wmv HD test file again...hope it works this time
Obin Olson is offline  
Old July 9th, 2004, 02:37 PM   #617
Major Player
 
Join Date: May 2004
Location: Knoxville, TN (USA)
Posts: 358
Quote:
Obin Olson wrote:
it's not my personal goal - I can't stand interlaced images - but people pay money for it - money talks
Hmmmm ... yeah, if money talked to me, it would probably be my personal goal too! :-) :-)
Rob Scott is offline  
Old July 9th, 2004, 05:10 PM   #618
Trustee
 
Join Date: Mar 2003
Location: Virginia Beach, VA
Posts: 1,095
Hey Obin,

There's no reason why you can't generate a 1080i signal from a 1080/30p or even 1080/60p signal. Frankly interlace is so . . . ugh. But you can't go from interlace to progressive very well, although going from progressive to interlace is quite easy.
Jason Rodriguez is offline  
Old July 9th, 2004, 05:39 PM   #619
Trustee
 
Join Date: Jan 2003
Location: Wilmington NC
Posts: 1,414
try this:
http://www.dv3productions.com/Video%.../HD%20test.wmv
Obin Olson is offline  
Old July 9th, 2004, 07:33 PM   #620
CTO, CineForm Inc.
 
Join Date: Jul 2003
Location: Cardiff-by-the-Sea, California
Posts: 8,090
Re: HDTest.wmv clip

Obin,

The images are very clean (such low noise.) This more than proves the capabilities of these camera types. The dancer sequeue seems to show more natural smooth blur. This is very nice.

The only weird thing I see is that half the sequences have a strong motion ghost. I have extracted an example frame the shows the problem:

www.cineform.com/temp/ObinGrab01.jpg

The flower's step appears to be in two places at once. Yet other sequences not have this artifact at all. Was this a filter you have applied?
__________________
David Newman -- web: www.gopro.com
blog: cineform.blogspot.com -- twitter: twitter.com/David_Newman
David Newman is offline  
Old July 9th, 2004, 09:46 PM   #621
Trustee
 
Join Date: Jan 2003
Location: Wilmington NC
Posts: 1,414
flower in post filter -yes
dancer(my sister) - 48fps playback at 24fps for slow-motion effect
Obin Olson is offline  
Old July 9th, 2004, 10:31 PM   #622
Major Player
 
Join Date: Oct 2003
Location: Southern Cal-ee-for-Ni-ya
Posts: 608
take a look at a comparison frame!

Obin, Interesting footage!

To see where things are related to the consumer JVC HD camera, I made this frame that has a frame of yours on the top and a frame I took with my HD10 on the bottom. No image enhancement was done to either.
I think the HD10 is a good camera to compare to, because it is better looking than DV, but has many other limitations for serious film making. ( only 8 bits, no manual control, etc )
I know the Bayer demosaiker is junk right now, etc, but people should see what the JVC does. Some people are so used to looking at DV, it's sad. I call DV web cam resolution these days, because that's what it is, really.

300KB comparison frame:

http://home.earthlink.net/~lesd/hd/JVC-1300-comparo.jpg

Other images in that dir are my orbital GG mechanism, in progress.

-Les
Les Dit is offline  
Old July 9th, 2004, 10:56 PM   #623
Major Player
 
Join Date: Jun 2004
Location: Buenos Aires , Argentina
Posts: 444
Well, even the slow motion scene has ghosting and I don't know why, I still think a 24 fps cycle with a mechanical shutter would be better.The first time I used a Cinealta camera, back in 1999, I remember it had the option of a mechanical one( don't know if it was a prototype or what).
I mean, it isn't exactly a natural motion blur but looks like a cheap frame blending (like the one used to add blur to synthetic images)
Obin, did you use some kind of noise reduction filter (temporal) ?

Also, have you tried the dual slope mode?
I'm really interested about how it looks, but nobody says anything about.
Juan M. M. Fiebelkorn is offline  
Old July 10th, 2004, 03:40 AM   #624
Inner Circle
 
Join Date: May 2003
Location: Australia
Posts: 2,761
It sounds simular to frame blending they use to go from 24/25 to 30FPS and vice versa, is something changing the frame rate along the workflow/viewing cycle. But then it doesn't quiet look like it. Steve?
Wayne Morellini is offline  
Old July 10th, 2004, 03:45 AM   #625
Inner Circle
 
Join Date: May 2003
Location: Australia
Posts: 2,761
<<<-- Originally posted by Juan M. M. Fiebelkorn :

Also, have you tried the dual slope mode?
I'm really interested about how it looks, but nobody says anything about. -->>>

Yes. Steve, how does this actually work, is it exactly the same as the Small sensors version? You said the results look un-normal, but is it possible to manage the positioning of the range of both slopes so they naturally run into each other to give a visually continouse range.

Thanks

Wayne.
Wayne Morellini is offline  
Old July 10th, 2004, 08:31 AM   #626
Trustee
 
Join Date: Jan 2003
Location: Wilmington NC
Posts: 1,414
this sensor does not have dual-slope! it's not a crappy FillFactory chip like the IBIS5 with dualslope

I have not used any frame blending at all maybe somthing in the compression...I see NOTHING on the original that has any type of frame blending arifacts...the flowers have 2 layers that fade in and out over each other...everything else is 24fps and 48fps

webcam....HAHHAHAA perfect! I love that! well a really good dvcamera has a good pic but it is low res forsure!!

Les I have the camera and computer at home today do you want me to get the 2 images you have been after for months!? ;) I could do it today...let me know what you want and I will do my best
Obin Olson is offline  
Old July 10th, 2004, 12:55 PM   #627
Trustee
 
Join Date: Jan 2003
Location: Wilmington NC
Posts: 1,414
Help! I just bought a 4mm c-mount lens and when it arrived it works - but with 4 very dark corners...it's like it was made for a 1/3 in camera chip not 1/2.....how do I know what to buy for lenses for this camera...I can see that c mount is not the only thing to look for! (4mm is a NICE wide I wish it was 2/3 in size!)

in looking at the back of the lens I can see that the glass on the back is smaller then the 12.5mm and 75mm I got from Steve...is this a clue?

on the lens the 4mm reads:

1:2.2/4mm

and the 12.5mm reads:

12.5mm 1:1.3


I understand the 12.5mm and the 4mm, what about the 1:1.3 and 1:2.2??



this looks 100% like what I have here but it's 25mm not 4mm:

http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&category=30077&item=3826939852&rd=1
Obin Olson is offline  
Old July 10th, 2004, 01:22 PM   #628
Inner Circle
 
Join Date: May 2003
Location: Australia
Posts: 2,761
On a comical note, Robs, I just watched this without speakers, and still laughed:

http://www.sun.com/aboutsun/media/fe...nsidejack.html
Wayne Morellini is offline  
Old July 10th, 2004, 01:23 PM   #629
Major Player
 
Join Date: May 2004
Location: Knoxville, TN (USA)
Posts: 358
Quote:
Obin Olson wrote:
I just bought a 4mm c-mount lens and when it arrived it works - but with 4 very dark corners...it's like it was made for a 1/3 in camera chip not 1/2
Not many listings appear to specify the aperture size (is that the right way to say it?). I noticed that there were different sizes when I was trying to figure out the lens I bought. If you look here you'll see that these lenses are specified as having a "format" which can be 1/2", 2/3" or 1". In this line of lenses, the 1/3" format is only for CS-mount lenses.

Sorry, I don't really have any more advice.

Software update: I'm making some progress with writing to multiple disks, but I range into comething strange with my hard drives. I have two 160 GB drives which should be identical, both mostly empty and unfragmented, but one gives me 22 MB/sec and the other ~12 MB/sec. They are on separate IDE channels, one is the master on its channel and the other is the slave on its channel. There are more details in the blog entry for today. Thanks!
Rob Scott is offline  
Old July 10th, 2004, 01:27 PM   #630
Major Player
 
Join Date: Oct 2003
Location: Southern Cal-ee-for-Ni-ya
Posts: 608
Test images

Obin,
OK heres what would be great:

Take 3 pictures, all of the same motionless setup ( still life ).

Try to use the 1/24 or 1/48 sec exposure and timing you would use for a motion picture. ( very Important ! )

Store the pics as B&W raw with > 8 bits
Have the image be of something with darks and lights in the same scene.
Have the camera be way out of focus for the images. ( see example below )

Even though it's out of focus, the images should still have areas with large dark and large while areas.

If this pic was motionless, this amount of focus would be perfect:
http://home.earthlink.net/~lesd/hd/test.jpg

So, It's out of focus, but there are still lights and darks.

That's it, let me know if you have questions!
-Les
Les Dit is offline  
Closed Thread

DV Info Net refers all where-to-buy and where-to-rent questions exclusively to these trusted full line dealers and rental houses...

Professional Video
(800) 833-4801
Portland, OR

B&H Photo Video
(866) 521-7381
New York, NY

Z.G.C.
(973) 335-4460
Mountain Lakes, NJ

Abel Cine Tech
(888) 700-4416
N.Y. NY & L.A. CA

Precision Camera
(800) 677-1023
Austin, TX

DV Info Net also encourages you to support local businesses and buy from an authorized dealer in your neighborhood.
  You are here: DV Info Net > Special Interest Areas > Alternative Imaging Methods

Thread Tools Search this Thread
Search this Thread:

Advanced Search

 



Google
 

All times are GMT -6. The time now is 03:03 PM.


DV Info Net -- Real Names, Real People, Real Info!
1998-2017 The Digital Video Information Network