Is global shutter available for camera module v2

[puppy101puppy]

The new camera module with Sony IMX219 will be amazing if global shutter is available. Any idea how to get global shutter work?

Thanks!

[ixc]

imx219pq has rolling shutter
you can't get this resolution with a global shutter in this sort of price

[Gavinmc42]

you can't get this resolution with a global shutter in this sort of price

Yet.
Give it a year or so.

[jbeale]

you can't get this resolution with a global shutter in this sort of price

Yet.Give it a year or so.

I'd say that's optimistic. Global shutter has been in an entirely different price category for as long as there have been CMOS sensors AFAIK.
Also, if the info on this page applies generally, going to global shutter with other design parameters the same means the maximum frame rate is cut in half, and the readout noise is doubled.

[Gavinmc42]

CCD tech applied to CMOS sensors
http://www.sony.net/Products/SC-HP/sens ... egius.html

Can hope it comes sooner, yes it will cost but not as much as it used to.
http://www.sony.net/Products/SC-HP/new_ ... 255_e.html
Disclaimer, I don't work for Sony, just found this stuff while looking for V2 data.
226 pin count, ouch, not routing that board.

How long before smart phones have global shutter?
Need global shutter chip with MiPi?
GoPro's? not sure, don't have one, I got Pi's.

Press announcement = ~2years before used in product?
How long before we as Joe Public can get this stuff from RPF?
Sony going to ignore the fastest growing PC company?
Not V2, or V3 maybe V4?

Pi's are being used in real products, cameras yet, soon?
Well maybe not the V2, it has issues;)

[puppy101puppy]

imx219pq has rolling shutter
you can't get this resolution with a global shutter in this sort of price

I see. thought Sony IMX219 itself comes with global shatter options.

[puppy101puppy]

CCD tech applied to CMOS sensors
http://www.sony.net/Products/SC-HP/sens ... egius.html

Can hope it comes sooner, yes it will cost but not as much as it used to.
http://www.sony.net/Products/SC-HP/new_ ... 255_e.html
Disclaimer, I don't work for Sony, just found this stuff while looking for V2 data.
226 pin count, ouch, not routing that board.

How long before smart phones have global shutter?
Need global shutter chip with MiPi?
GoPro's? not sure, don't have one, I got Pi's.


That's so true.

Press announcement = ~2years before used in product?
How long before we as Joe Public can get this stuff from RPF?
Sony going to ignore the fastest growing PC company?
Not V2, or V3 maybe V4?

Pi's are being used in real products, cameras yet, soon?
Well maybe not the V2, it has issues;)

[puppy101puppy]

you can't get this resolution with a global shutter in this sort of price

Yet.Give it a year or so.

I'd say that's optimistic. Global shutter has been in an entirely different price category for as long as there have been CMOS sensors AFAIK.
Also, if the info on this page applies generally, going to global shutter with other design parameters the same means the maximum frame rate is cut in half, and the readout noise is doubled.

That looks reasonable. Thanks.

[ralphhipps]

look about halfway down, it should be available if we can write to the correct register.

can raspistill do this?

https://www.raspberrypi.org/documentati ... /README.md

[jbeale]

Well, an old thread resurfaces... neither the v1 nor the v2 RPi cameras have true gobal shutter. That would require an entirely different architecture which uses more silicon and costs more money. There was a datasheet for the v1 (OmniVision OV5647) chip marked "confidential/preliminary" that listed on the first page "rolling shutter/global shutter" but that phrase appears nowhere else. Unclear whether it was a misprint or just misleading. It is possibly a reference to the flash mode, which still relies on an external physical shutter to control the exposure, unless the ONLY light is your flash. But in that case you could get the same effect in normal rolling shutter mode by simply choosing a longer exposure and timing the flash towards the middle so there's no dramatic advantage to that mode that I can see.

[HermannSW]

v1 has global reset mode (all lines start exposure at the same time), v2 camera does not have such a mode.

..., unless the ONLY light is your flash. But in that case you could get the same effect in normal rolling shutter mode by simply choosing a longer exposure and timing the flash towards the middle so there's no dramatic advantage to that mode that I can see.

That is only an option for slow moving objects. Even in mode 7 reading a line takes 31µs, so 480 lines take 1.5ms. The first and last line will be captured >1.4ms apart, a bullet with 375m/s will fly 525mm in that time. So for fast moving objects only v1 camera with global reset and a very short flash duration can help (I am working on that in Arducam ov5647 thread and this thread for v1 camera). I use 5000lm led and power it completely off in 3-11µs currently.


P.S:
There are new monochrome (<30$) global shutter cameras you can run directly on a Pi via CSI interface, 0.3MP and 1MP. You can see a live demonstration of the 0.3MP camera here:
https://www.youtube.com/watch?v=Iefuxbx_pIo
(https://www.youtube.com/watch?v=f_saNQQACOo, demo of other global shutter camera needing 50$ usb module)

Since Arducam had no access to closed source GPU they had to provide their own driver, similar to raspiraw. But that driver allows to access the cameras via v4l2.

While in discussion with Arducam support wrt FREX global reset mode for Arducam ov5647 camera I have bought, I was offered to get free samples of the new cameras. They have not arrived yet.

[6by9]

P.S:
There are new monochrome (<30$) global shutter cameras you can run directly on a Pi via CSI interface, 0.3MP and 1MP. You can see a live demonstration of the 0.3MP camera here:
https://www.youtube.com/watch?v=Iefuxbx_pIo
(https://www.youtube.com/watch?v=f_saNQQACOo, demo of other global shutter camera needing 50$ usb module)

Since Arducam had no access to closed source GPU they had to provide their own driver, similar to raspiraw. But that driver allows to access the cameras via v4l2.

While in discussion with Arducam support wrt FREX global reset mode for Arducam ov5647 camera I have bought, I was offered to get free samples of the new cameras. They have not arrived yet.

I'm not sure quite what they've done there, but for OV7251 they just need to build and provide DT coniguration for the driver that is in the mainline kernel - https://elixir.bootlin.com/linux/latest ... c/ov7251.c.

A couple of minutes with a hex editor and I think they're merging rawcam and the ISP MMAL components with an I2C register set to configure the sensor. The DT is incomplete, hence their issues with raspistill/vid.
I think they're also in violation of the GPL licence, which may come back to bite them (I'll raise an issue on their Github repo in a minute).

If they want to talk to us to help get it properly supported, then I'm open to discussion. All the bits are in the kernel repo for doing it properly. At the moment they have a support nightmare in rebuilding kernel modules every time the kernel version gets bumped.