High Definition with Elphel model 333 camera

Andrey Filippov · April 24th, 2006, 03:34 AM

Quote:

Originally Posted by Serge Victorovich

Question to Andrey Filippov
It is possible record compressed RAW (similar to CineformRAW) from smos direct-to-hdd with small modification of existing architecture of Elphel333 ?

No - that will be a major redesign - our cameras do not have a disk interface.

Serge Victorovich · April 24th, 2006, 03:55 AM

Thank you, Andrey for clarification. How much cost work to make a such solution camera:
Compressed RAW from CMOS direct-to-disk and streaming proxy (low 1/2 or 1/4 resolution) through GIGe ?

Forrest Schultz · April 24th, 2006, 08:33 AM

I think it would be out of the way for Andrey right now. he makes High resolution Network cameras mainly for security purposes. This thread is for tests done with his current design to make it possible for filmmaking. His design right now really really good quality. I should be getting my lenses in these few days. and ill show you what i mean.

Oscar Spierenburg · April 24th, 2006, 08:40 AM

Forrest (and others)

I got my camera a few days ago. I'm not able to do tests this week because I'm out of the country, but I'll follow this thread and post my results when I'm back.

Forrest Schultz · April 27th, 2006, 08:36 AM

heres a test with the new f1.3 computar varifocal lens:
http://i11.photobucket.com/albums/a1...etti/rexx5.jpg

sorry for the horrible lighting, i had the blown out areas because that paper is glossy and i was getting light reflected from through the windows from outside. and my back is basiaclly a wall of french doors, (glass doors) so they all are windows.

Les Dit · April 27th, 2006, 03:16 PM

Pardon my ignorance, but can this camera acquire motion video at more than 8 bits deep ?
Other than that, what are we gaining over a normal HD video camera , other than something to tinker with ?
It's good to see people trying out new devices! keep it up!
-Les

Régine Weinberg · May 3rd, 2006, 06:42 AM

bonjour

as I did tell you,
have a mechanical shutter,
use a classical viewfinder

I lost this link
voila
here it goes
www.arri.de/entry/416.htm

nothing is dead, it is brand new

Régine Weinberg · May 3rd, 2006, 06:44 AM

Quote:

Originally Posted by Les Dit

Pardon my ignorance, but can this camera acquire motion video at more than 8 bits deep ?
Other than that, what are we gaining over a normal HD video camera , other than something to tinker with ?
It's good to see people trying out new devices! keep it up!
-Les

a really good one, who knows??

direct to disc
a huge choice of lenses
and so on

Forrest Schultz · May 3rd, 2006, 08:28 AM

Ronald, would you have any idea as to know how sync a 180 degree shutter to the Elphel's stream? It would be very cool in theroy, but i dont think id be able to build something that would cover the light at the right time inervals.

and after that was built, the viewfinder would go next.

Thank you for that link, i think i figured out what else i need to make the viefinder i was going to make. that pechan prism looks very handy.

Régine Weinberg · May 3rd, 2006, 10:22 AM

http://home.teleport.com/~gdi/25pscha.htm
came up decades ago
http://www.dvinfo.net/conf/showthrea...25808&page=140

Régine Weinberg · May 3rd, 2006, 12:37 PM

So
maybe an idiot one
but how to get sync out of this board??

Noah Yuan-Vogel · May 3rd, 2006, 01:18 PM

The 3mp micron chip that the elphel uses is capable of running snapshots in global reset mode which means all the lines are exposed at the same time, but this requires a mechanical shutter to cut it off at the end (i assume exposure time becomes longer for the lower lines because they just keep exposing until readout gets to them or something). also the chip has the ability to recieve an external trigger that begins a frame. I assume that if you run in global reset mode with a mechanical shutter, you lose the ability to have much longer than 180degree shuttters, but rolling shutter artifacts would be totally removed. The question is whether or not elphel has support for these functions and if you can find a way to hook up a crystal to the camera and the shutter. WIthout this, i dont think a mechanical shutter would do much since the actual exposure period of the first and last rows, in many configurations, hardly even overlap at all, so youd just end up reducing the exposure of probably the first and last rows, basically darkening the tops and bottom of the frame.

Keith Wakeham · May 3rd, 2006, 06:14 PM

Andrey,

Just curious, I downloaded the open source stuff and was picking through you FPGA code.

Since I'm not to familiar with Verilog (I'm coding in VHDL) I was wondering if you have any documentation to go with the compressor. Is all the compression done in the FPGA, I only took a quick look and its hard to tell from unfamiliar code, or do you have to do entropy encoding in the processor or something.

Wayne Morellini · May 3rd, 2006, 08:52 PM

Quote:

Originally Posted by Keith Wakeham

Since I'm not to familiar with Verilog (I'm coding in VHDL) I was wondering if you have any documentation to go with.

I'm pretty sure that their would be translation tools out there, from one to the other, if that would help you.

Serge Victorovich · May 4th, 2006, 03:10 AM

Ogg Theora Information

May 3rd, 2006, 06:42 AM	#112
Régine Weinberg Major Player Join Date: Jan 2004 Location: Bordeaux, going to Bangkok, 2011 Posts: 232	have a look please bonjour as I did tell you, have a mechanical shutter, use a classical viewfinder I lost this link voila here it goes www.arri.de/entry/416.htm nothing is dead, it is brand new

May 3rd, 2006, 10:22 AM	#115
Régine Weinberg Major Player Join Date: Jan 2004 Location: Bordeaux, going to Bangkok, 2011 Posts: 232	an old one http://home.teleport.com/~gdi/25pscha.htm came up decades ago http://www.dvinfo.net/conf/showthrea...25808&page=140

May 3rd, 2006, 12:37 PM	#116
Régine Weinberg Major Player Join Date: Jan 2004 Location: Bordeaux, going to Bangkok, 2011 Posts: 232	a question So maybe an idiot one but how to get sync out of this board??

May 3rd, 2006, 06:14 PM	#118
Keith Wakeham Major Player Join Date: Jan 2005 Location: St. John's, NL, Canada Posts: 416	Andrey, Just curious, I downloaded the open source stuff and was picking through you FPGA code. Since I'm not to familiar with Verilog (I'm coding in VHDL) I was wondering if you have any documentation to go with the compressor. Is all the compression done in the FPGA, I only took a quick look and its hard to tell from unfamiliar code, or do you have to do entropy encoding in the processor or something. __________________ www.engr.mun.ca/~wakeham/index.htm

April 24th, 2006, 03:55 AM	#107
Serge Victorovich Major Player Join Date: Oct 2005 Posts: 376	Thank you, Andrey for clarification. How much cost work to make a such solution camera: Compressed RAW from CMOS direct-to-disk and streaming proxy (low 1/2 or 1/4 resolution) through GIGe ?

April 24th, 2006, 08:33 AM	#108
Forrest Schultz Major Player Join Date: Mar 2005 Location: Atwater, CA Posts: 246	I think it would be out of the way for Andrey right now. he makes High resolution Network cameras mainly for security purposes. This thread is for tests done with his current design to make it possible for filmmaking. His design right now really really good quality. I should be getting my lenses in these few days. and ill show you what i mean.

April 24th, 2006, 08:40 AM	#109
Oscar Spierenburg Major Player Join Date: Jan 2005 Location: (The Netherlands - Belgium) Posts: 735	Forrest (and others) I got my camera a few days ago. I'm not able to do tests this week because I'm out of the country, but I'll follow this thread and post my results when I'm back.

April 27th, 2006, 08:36 AM	#110
Forrest Schultz Major Player Join Date: Mar 2005 Location: Atwater, CA Posts: 246	heres a test with the new f1.3 computar varifocal lens: http://i11.photobucket.com/albums/a1...etti/rexx5.jpg sorry for the horrible lighting, i had the blown out areas because that paper is glossy and i was getting light reflected from through the windows from outside. and my back is basiaclly a wall of french doors, (glass doors) so they all are windows.

April 27th, 2006, 03:16 PM	#111
Les Dit Major Player Join Date: Oct 2003 Location: Southern Cal-ee-for-Ni-ya Posts: 608	Pardon my ignorance, but can this camera acquire motion video at more than 8 bits deep ? Other than that, what are we gaining over a normal HD video camera , other than something to tinker with ? It's good to see people trying out new devices! keep it up! -Les

May 3rd, 2006, 08:28 AM	#114
Forrest Schultz Major Player Join Date: Mar 2005 Location: Atwater, CA Posts: 246	Ronald, would you have any idea as to know how sync a 180 degree shutter to the Elphel's stream? It would be very cool in theroy, but i dont think id be able to build something that would cover the light at the right time inervals. and after that was built, the viewfinder would go next. Thank you for that link, i think i figured out what else i need to make the viefinder i was going to make. that pechan prism looks very handy.

May 3rd, 2006, 01:18 PM	#117
Noah Yuan-Vogel Major Player Join Date: Dec 2004 Location: New York City Posts: 613	The 3mp micron chip that the elphel uses is capable of running snapshots in global reset mode which means all the lines are exposed at the same time, but this requires a mechanical shutter to cut it off at the end (i assume exposure time becomes longer for the lower lines because they just keep exposing until readout gets to them or something). also the chip has the ability to recieve an external trigger that begins a frame. I assume that if you run in global reset mode with a mechanical shutter, you lose the ability to have much longer than 180degree shuttters, but rolling shutter artifacts would be totally removed. The question is whether or not elphel has support for these functions and if you can find a way to hook up a crystal to the camera and the shutter. WIthout this, i dont think a mechanical shutter would do much since the actual exposure period of the first and last rows, in many configurations, hardly even overlap at all, so youd just end up reducing the exposure of probably the first and last rows, basically darkening the tops and bottom of the frame.

May 4th, 2006, 03:10 AM	#120
Serge Victorovich Major Player Join Date: Oct 2005 Posts: 376	Ogg Theora Information