Entropy512

Lives in United States Binghamton, NY, United States
Works as a Electrical Engineer
Joined on Feb 25, 2015

Comments

Total: 1980, showing: 1 – 20
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In reply to:

Entropy512: At least they upped the battery warranty to 12 months.

Which means they'll fail at 13...

I've basically not bought a quadcopter in ages.

It's too bad GoPro (and every other camera manufacturer not part of a UAV company already) still don't understand the UAV market - all we need is for ONE camera vendor to put in a robust wired remote control mechanism that allows it to be integrated into a host platform. There's a VERY robust ecosystem of flight controllers, ESCs, power management, RC/telemetry links - the one thing really missing (Thanks for your developer-unfriendliness Ambarella!) is a camera that has robust external control.

(Too bad the Broadcom SoCs used in Raspberry Pis don't support 4k encoding... A Pi-based camera that could do 4k would be a game changer.)

Link | Posted on May 13, 2022 at 14:23 UTC
In reply to:

Entropy512: At least they upped the battery warranty to 12 months.

Which means they'll fail at 13...

It's too bad DJI wrecked the industry with some questionable practices (price dumping that even hurt themselves in the long run).

It's also too bad Yuneec cratered, their products were superior (especially in terms of battery quality and interoperability, being able to use a standard balance charger means that my 5-year old Yuneec batteries are still in great shape, and no battery DRM means that people have built adapters to use off-the-shelf lipos with Yuneec aircraft.)

Link | Posted on May 12, 2022 at 13:17 UTC
In reply to:

Djehuty: Why was it 10x slower prior?

Software encoding only on those platforms is my guess.

For people using NVidia GPUs, it's indeterminate whether or not that is already hardware accelerated in Premiere. It was clearly not improved with this release, but it's unclear whether improvement was needed, or if it was already hwaccel to begin with on those platforms.

Link | Posted on May 12, 2022 at 13:10 UTC

At least they upped the battery warranty to 12 months.

Which means they'll fail at 13...

Link | Posted on May 10, 2022 at 13:38 UTC as 54th comment | 5 replies

I would love to see what would happen if a camera manufacturer backed a decent sensor + optics package with a Qualcomm ISP.

Link | Posted on May 6, 2022 at 13:48 UTC as 16th comment
In reply to:

janbanan: Red and BMd has been able to shoot 8K and 12k raw for a long time of this is the first 8K hdr I’m not sure if that’s true?

First on a smartphone

Link | Posted on May 6, 2022 at 13:46 UTC
In reply to:

Entropy512: Interesting variation on coded aperture imaging - https://en.wikipedia.org/wiki/Coded_aperture

Except that coded aperture imaging isn't shaping the OOF PSF of a lens, per the link that I gave - it's usually used in cases where a lens isn't even practically realizable (such as X-ray imaging).

Although I do recall you used a variation that combined coded aperture with a lens for the purposes of encoding depth information.

This is the first time I've seen someone applying lenseless coded aperture to visible wavelengths where a lens is typically possible though.

Link | Posted on May 3, 2022 at 20:48 UTC

Interesting variation on coded aperture imaging - https://en.wikipedia.org/wiki/Coded_aperture

Link | Posted on May 3, 2022 at 19:36 UTC as 25th comment | 4 replies
In reply to:

Horshack: "ProGrade Digital...says each component of the card is tested ‘down to individual memory chips’ to ensure the best performance and reliability possible"

What alternative is ProGrade implying? Just slapping a label on the card and calling it a day?

"and probably is…. Even the cheap Chinese manufacturers"
Given how often there are blatant counterfeits shipped out that will fail even the most basic system-level tests (8GB card reporting as 64, use anything above the first 8GB and it fails...), I'd disagree on this one.

Link | Posted on May 2, 2022 at 20:20 UTC
In reply to:

Horshack: "ProGrade Digital...says each component of the card is tested ‘down to individual memory chips’ to ensure the best performance and reliability possible"

What alternative is ProGrade implying? Just slapping a label on the card and calling it a day?

I'm assuming that's what they are implying, as opposed to a system-level test (put everything together, then run tests on the fully assembled product to make sure it's compliant with the SD standards)

Or: The alternative they are implying is a system-level test, as opposed to no testing at all.

Link | Posted on May 2, 2022 at 18:21 UTC
In reply to:

Magnar W: Somebody who knows how the new Iris Xe graphics (96 eu) handles up to 4K video?

Intel integrated has done 4k hardware encode and decode since Kaby Lake or so...

Link | Posted on May 2, 2022 at 18:05 UTC
In reply to:

Horshack: "ProGrade Digital...says each component of the card is tested ‘down to individual memory chips’ to ensure the best performance and reliability possible"

What alternative is ProGrade implying? Just slapping a label on the card and calling it a day?

System-level tests as opposed to individual-component tests?

Link | Posted on May 2, 2022 at 18:03 UTC
In reply to:

SomeguyPNW: Looks like 10bit isn't available on the iPhone SE 2, just checked. Guess it's just the 12s and 13s?

"The exmor used by iphones SE do not have 10-bit ADC."
Of course they don't. Most mobile sensors are now 12 bits or above.

Mobile sensors with only 10-bit capability are extremely low-end and outdated. (Such as the 8MP omnivision sensor used by the Xphase Pro series of 360 cameras)

Now if you mean the H.264/265 encoder in the SoC doesn't do 10 bits, that would be an accurate assertion. 10-bit depth in hardware H.264/265 encoders is pretty rare still. :(

Link | Posted on May 2, 2022 at 14:32 UTC
In reply to:

thx1138: The big question is why would that trilobite visual system die out given how good it was. What were it limitations compared to a single focal length visual system?

@BaldCol - of note here, you just identified a major flaw in this organism's visual system:

The main lens was calcite. Acid dissolves calcite easily. So the ocean acidification likely blinded these creatures.

Link | Posted on Apr 29, 2022 at 13:32 UTC
In reply to:

Jon555: Perhaps manufacturers should also offer a range of slower cards that run cooler than the current ones, as well as the usual larger/faster ones. Some people might like that, especially when shooting in hot climates.

And the H.26x encoders

Link | Posted on Apr 26, 2022 at 13:44 UTC
In reply to:

jboyer: This is reminder on why FF sensors are not as expensive as they used to be. It also helps understand that there is more to a digital camera than sensor. Adding the PI cost -- surely a top of the line 4B, gives a range of $200 to $250 total outlay. Not unexpensive.

Then comes the art of transforming 'good' pictures to better ones. In camera software, like Canon/Nikon or Sony; or outside the camera...figuring out which commercial tool can read RAW from this camera.

I believe this camera or camera array (an interesting offer) might be more targeted to applications like self driving, security with facial recognition etc.

I own a few PIs and I have tested the camera for object/color recognition. A neat package.

It depends on the implementation. If they can do different exposure times within the quad, that's a good way to get HDR capability.

Link | Posted on Apr 26, 2022 at 13:35 UTC
In reply to:

Francis85: USB 5v is pretty useless for a camera with PD. It should be at least 7.2 to 8.4v as the battery in your camera require. In this case a powered grip makes more sense. The D-Tap port could have some use to power an external monitor, however the capacity of this battery is rated 3300 mAh. By far not enough to keep your Atomos V or Shinobi running for prolonged period.

7 out of 10 for the idea, but just 3 points for the execution.

"My recent Sony cameras (both action cam and E-mount mirrorless) worked great all day long on 5V USB powerbanks from the local discount store!"

The A7M3 most definitely CANNOT be sustained indefinitely on 5v USB power, especially when video recording.

If it actually drew 1.5A or more when powered on it might be different, but when you flip the switch on, it drops to <1A... Kind of the opposite of what you'd actually want.

I haven't done any significant stress tests of the A7M4 yet, but most of Sony's E-mount cameras prior to USB-PD were unable to do sustained operation on external power via USB, only via dummy battery. No Sony I've ever owned (A6000, A6300, A6500, A7M3) could.

Link | Posted on Apr 26, 2022 at 13:33 UTC
In reply to:

jboyer: This is reminder on why FF sensors are not as expensive as they used to be. It also helps understand that there is more to a digital camera than sensor. Adding the PI cost -- surely a top of the line 4B, gives a range of $200 to $250 total outlay. Not unexpensive.

Then comes the art of transforming 'good' pictures to better ones. In camera software, like Canon/Nikon or Sony; or outside the camera...figuring out which commercial tool can read RAW from this camera.

I believe this camera or camera array (an interesting offer) might be more targeted to applications like self driving, security with facial recognition etc.

I own a few PIs and I have tested the camera for object/color recognition. A neat package.

"figuring out which commercial tool can read RAW from this camera"
Quad-bayer support is definitely a bit niche, but 16MP binned is easily put into a DNG.

Link | Posted on Apr 25, 2022 at 16:50 UTC
In reply to:

winkalman: This looks like a really promising platform for a DIY 3D camera. Dual 1/1.7" sensors with F1.8 lenses could yield some decent image quality. I don't suppose anyone has managed to port Gcam to the Raspberry Pi yet?

Android support for the Pi (and hence gcam) is pretty basic - only a few third-party projects support it to varying degrees.

Pis are all about libcamera - and there's nothing preventing you from implementing many of the gcam stacking algorithms in software.

(Unfortunately https://github.com/kunzmi/ImageStackAlignator is CUDA-specific, so getting it to play nice with Vulkan would be a significant effort. Getting Halide to work on Vulkan is a WIP, and Tim Brooks' HDR+ implementation would probably gain hwaccel with that improvement - https://github.com/halide/Halide/issues/2296 and https://github.com/timothybrooks/hdr-plus )

Link | Posted on Apr 25, 2022 at 16:49 UTC

I really hope the next Pi supports 4-lane CSI, and 4k encoding...

Link | Posted on Apr 25, 2022 at 15:40 UTC as 16th comment
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