[HN Gopher] RK3588 - Implementing a Vectorscope for processing v...
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RK3588 - Implementing a Vectorscope for processing video in real
time
Author : zdw
Score : 50 points
Date : 2025-05-02 16:05 UTC (4 days ago)
(HTM) web link (jas-hacks.blogspot.com)
(TXT) w3m dump (jas-hacks.blogspot.com)
| kamma4434 wrote:
| I wonder why you should have a vectorscope in real time if the
| point is showing histograms to humans.
|
| As the image does not change much frame to frame, I presume that
| if you compute it and display it every fifth frame or so, nobody
| would ever notice.
| dragontamer wrote:
| Well it's clearly some kind of strange requirement to require a
| relatively low power and specifically the RK3588 instead of any
| other chip or even Desktop chip.
|
| It's a lot of work for some processor likely using less than 5W
| of power. Impressive for sure but now I'm curious what
| application this is for in general.
|
| Who needs to do this but doesn't want to use a far more
| powerful cell phone or laptop processor?
|
| -------
|
| Not to hate on the work at all! It's clearly a lot of effort to
| get this to run on such a relatively small chip.
|
| Maybe it's just exercise to learn how to use OpenGL on such a
| small platform for GPGPU compute? Might be good reason enough
| to try to accomplish??
| NewJazz wrote:
| Rk3588 was originally designed with smart screens as one
| possible use case. That's why it has an HDMI input on board
| (and several video outputs).
| luma wrote:
| If the chip is getting the job done and it's a fixed-function
| device, why would one want to spec a more expensive, more
| power hungry solution in its place?
|
| I don't think "minimum required hardware" is a "strange
| requirement", in fact it's essentially ALWAYS the requirement
| when developing embedded solutions.
| shadowpho wrote:
| This is probably development for a tool to light up LED to
| match up with input video. So cost is a big concern and
| Rk3588 is already one of the beefier/expensiver options
| Aurornis wrote:
| > Well it's clearly some kind of strange requirement to
| require a relatively low power and specifically the RK3588
| instead of any other chip or even Desktop chip.
|
| RK3588 has 4K @ 60Hz HDMI input built in to the chip. Install
| the Linux distribution, attach HDMI cable, and you can pipe
| HDMI input into v4l2 or any other destination. No messing
| with capture cards, powered USB hubs, or 3rd-party drivers.
|
| > Who needs to do this but doesn't want to use a far more
| powerful cell phone or laptop processor?
|
| It's a fast chip. Fast enough. Convenience of the small all-
| in-one solution is more important than using the fastest chip
| you can find.
| dylan604 wrote:
| wait, are you saying that someone that was trained on how to
| use a vectorscope would not notice the image not changing frame
| by frame in real time? that is absolutely ludicrous. i grew up
| using waveforms/vectorscopes/audio phase meters, and seeing 1/5
| of the data would drive me crazy. that would be like watching
| streaming video with buffering problems. we no longer use
| RealMedia for a reason
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