4:4:4 10bit single CMOS HD project - Page 177 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 March 16th, 2005, 10:05 AM   #2641
Trustee
 
Join Date: Jan 2003
Location: Wilmington NC
Posts: 1,414
Ok a screengrab will do..let me get to work...i will post one then...the last issue we now have is the save of raw data..we are waiting on a 3rd party at the moment for a software fix of the profiler we are using...once this is done we should have a working beta of CineLink!
Obin Olson is offline  
Old March 16th, 2005, 10:07 AM   #2642
Trustee
 
Join Date: Jan 2003
Location: Wilmington NC
Posts: 1,414
www.dv3productions.com/pub/dog.tif

shot with an OLD 16mm c-mount lens ;)
Obin Olson is offline  
Old March 16th, 2005, 10:15 AM   #2643
Regular Crew
 
Join Date: Mar 2004
Posts: 65
Hey Obin, some great lattitude and tonal range in that frame. However, I noticed a strange grid-like pattern when viewed at larger magnification.
Brad Abrahams is offline  
Old March 16th, 2005, 11:18 AM   #2644
Trustee
 
Join Date: Jan 2003
Location: Wilmington NC
Posts: 1,414
yes grid..we have the most basic bayer filter you can have..this is why you see the grid. If your digital still camera took every pixel from the chip and gave it an RGB value it would look the same.

after we get raw save working we will have some Bayer Filter options
Obin Olson is offline  
Old March 17th, 2005, 06:27 AM   #2645
Major Player
 
Join Date: Jan 2005
Location: (The Netherlands - Belgium)
Posts: 735
That's a huge file for one frame. I can see the grid, but besides that, it has very film like detail and tones. OK great...so now we demand a second image.

No, really it looks great.
Oscar Spierenburg is offline  
Old March 17th, 2005, 08:03 AM   #2646
Trustee
 
Join Date: Jan 2003
Location: Wilmington NC
Posts: 1,414
found a workaround for the profiler issue..back to work..more later
Obin Olson is offline  
Old March 17th, 2005, 11:06 AM   #2647
Tourist
 
Join Date: Nov 2003
Posts: 4
Appreciation

Greetings all. I'm a newcomer, joined years ago but rarely kept up with DVi... but I am exceedingly pleased to come back and find amazing projects like this going on. Obin, you are da man. I have no idea who you are but your perseverence with this project is amazing. 175 pages of replies? What in heaven's name?! And this is soooo the right way to do things, too - start with a sensor, not a Nikon F and a CD/sandpaper.

I will be enthusiastically checking up on this from day to day.... the passion that a lot of folks are displaying for DIY cinema cameras (sic) is great, but here is one place where the passion has some real direction to it.

Also, Obin, if you need any help with very accurate machining (lathing or CNC milling) let me know. Also, if you have any parts that need to be physically aligned to very accurate tolerances, give me a holler - I'm a flutemaker and we have some amazingly accurate ruby-probe 3D measurement tools here in the shop (+/- 0.0001").... I can build you fixturing or whatever you need, at cost. All the equipment belongs to my father and I (old family business) so I'm open to doing whatever work you need to get this camera to the place where you want it. No idea if you'd ever need this sort of work, but I figured if nothing else you'd appreciate knowing that there's someone else willing to donate some time to this project. Our shop is very flexible so don't be afraid to email me (klimermonk -at- hotmail -dot- com) if you have something in mind.

JL
Jonathon Landell is offline  
Old March 18th, 2005, 08:34 AM   #2648
Trustee
 
Join Date: Jan 2003
Location: Wilmington NC
Posts: 1,414
John;

thanks a bunch for the offer..i have a small cnc machine but it seems you have years of working with them on your side(I don't) I will take you up on the offer when the time comes...or atleast you could help if we want to do it at our shop? I am sure good things will come however we do it.


thanks for the positive feedback... ;)

we have some good news.

today we ran save tests that are showing we can get full 24fps 1080p datarate on our 2 drives. We have a test app that saved 4 gigs in 512kb chunks on the disks at 97MB/Sec with no problems...now it's time to write that in the code and get some real progress....
Obin Olson is offline  
Old March 18th, 2005, 08:35 AM   #2649
Trustee
 
Join Date: Jan 2003
Location: Wilmington NC
Posts: 1,414
.
Obin Olson is offline  
Old March 18th, 2005, 08:41 AM   #2650
Regular Crew
 
Join Date: Feb 2005
Location: .
Posts: 52
Hi Obin,

Congratulations! Just one thing I noticed...You should only need about 72MB/sec for 24p, 12-bits per pixel. Are you receiving one pixel in 16-bits? With the GigeLink I can pack my 10-bit data, two pixels in 3 bytes. The 10-bit data is bit-shifted by two ("normalized 12-bit").
This packing results (for me) in only moderate overhead for the display (more shifting by 4 must be done).
I'm assuming your capturing about 48MP/sec.
Kyle Granger is offline  
Old March 18th, 2005, 08:45 AM   #2651
Trustee
 
Join Date: Jan 2003
Location: Wilmington NC
Posts: 1,414
we don't have pixel packing with CameraLink

Kyle, what is your project? are you working on software?
Obin Olson is offline  
Old March 18th, 2005, 09:10 AM   #2652
Regular Crew
 
Join Date: Feb 2005
Location: .
Posts: 52
Obin,
> we don't have pixel packing with CameraLink
Then you are unfortunately stuck with the 16-bit pixels. However, you might try a test: Do the 16-bit to 12-bit conversion in software. The CPU overhead should not be too bad: A couple of shifts and an add in C/C++, and you get 72MB/sec. Your programmer sounds very experienced. 10-bit packing (4 pixels in five bytes, 60MB/sec) is also a possibility, but that increases the bit-twiddling. Yet another possibility: "10.667-bit" packing -- 3 pixels in 4 bytes (64MB/sec).

> Kyle, what is your project? are you working on software?
I am pretty much finished with the software. It is merely a grabber application, like yours, with capture, display and recording to disk. For one Gigelink interface (with SI-3300RGB or SI-1300M), or two cameras (stereo, 2x SI-1300).
It all works fine. There is also a converter dialog, which exports image sequences from the RAW file (BMP (24-bit), SGI (48-bit), and DPX (log 30-bit).

You tend to get married to whatever grabber SDK you use. I lucked out with the GigeLink: It is well-written and well-documented.
Most of the CL boards I looked at last summer do perform pixel packing (BitFlow, Coreco, Leutron) --- not that that helps you.
Kyle Granger is offline  
Old March 18th, 2005, 10:33 AM   #2653
Trustee
 
Join Date: Jan 2003
Location: Wilmington NC
Posts: 1,414
Kyle are you using 10-12bit in your software? or are you using 8bit captures? what are you going to do with your software?
Obin Olson is offline  
Old March 18th, 2005, 12:17 PM   #2654
Regular Crew
 
Join Date: Feb 2005
Location: .
Posts: 52
> are you using 10-12bit in your software?
Application is hot-rodded for 12-bit packed. No 8-bit captures (but simple enough to implement). Device can be 10-bit (3300, 1300) or 12-bit.
> what are you going to do with your software?
I shoot with it almost every day. And a company is involved.
Kyle Granger is offline  
Old March 19th, 2005, 08:10 AM   #2655
Inner Circle
 
Join Date: May 2003
Location: Australia
Posts: 2,761
Can you keep us updated, and give details when the time comes?

Wayne.
Wayne Morellini 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 01:32 AM.


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