NO YOU ARE!

> make moving pictures appear seamless

True enough.

NTSC is 30fps, while PAL is 25fps.

The overwhelming majority of people were happy enough to spend, what, billions on screens and displays capable of displaying motion picture in those formats.

That there is evidence that most(?) people are able to sense high frequency PWM signals doesn’t make the claim that 15 to 20 frames per second is sufficient to make moving pictures appear seamless.

I’ve walked in to rooms where the LED lighting looks fine to me, and the person I was with has stopped, said “nope” and turned around and walked out, because to them the PWM driver LED lighting makes the room look illuminated by night club strobe lighting.

That doesn’t invalidate my experience.

The discussion on flicker fusion frequency (FFF) and human vs. canine perception is fascinating. When building systems that synchronize with human physiology, like the metabolic digital twins I'm currently developing, we often find that 'perceived' seamlessness is highly variable based on cognitive load and environmental light.

While 24-30fps might suffice for basic motion, the biological impact of refresh rates on eye strain (especially for neurodivergent users) is a real engineering challenge. This is why I've been pushing for WCAG 2.1 AAA standards in my latest project; it’s not just about 'seeing' the image, but about minimizing the neurological stress of the interaction itself.

Badly phrased but not wrong, this is the minimum frame rate for humans to perceive motion as supposed to a slide show of images.

The maximum frame rate we can perceive is much higher, for regular video it's probably somewhere around 400-800.

It's about being able to perceive it as a "living" moving creature and not something different.

You can understand something below the perception threshold is supposed to be a creature because you both have a far more advanced brain and you've been exposed to such things your entire life so there's a learned component; but your dog may simply not be capable of making the leap in comprehending that something it doesn't see as living/moving is supposed to be representative of a creature at all.

I've personally seen something adjacent to this in action, as I had a dog over the period of time where I transitioned from lower framerate displays to higher framerate displays. The dog was never all that interested in the lower framerate displays, but the higher framerate displays would clearly capture his attention to the point he'd start barking at it when there were dogs on screen.

This is also pretty evident in simple popular culture. The myth that "dogs can't see 2D" where 2D was a standin for movies and often television was pervasive decades ago. So much so that (as an example) in the movie Turner and Hooch from 1989, Tom Hanks offhandedly makes a remark about how the dog isn't enjoying a movie because "dogs can't see 2D" and no further elaboration on it is needed or given; whereas today it's far more common to see content where dogs react to something being shown on a screen, and if you're under, say, 30 or so, you may not have ever even heard of "dogs can't see 2D".

With CRTs I would think that the problem may be that they do not see a full picture at all. Because the full screen is never lit all at once? Don’t know how persistence of vision works in this case…

With Cathode ray TVs only a single pixel at a time is on, it relies on our eyes having bad enough temporal resolution, if you have Superspeed eyes you will see just a coloured line/pixel moving on screen

Dogs can see some colors, but not as many as humans. They have dichromatic vision, and see shades of gray, brown, yellow and blue. Red and green are particularly bad colors for them.

We get blue tennis balls for our pups instead of green; but they aren’t the fetching kind so not sure if it helps.

It's pretty hard to avoid uncompressed audio. Even if it's PCM, there's almost always a lowpass filter, either explicitly in the input/output processing, by the sampling rate, or from the physical limits of the mic and speaker.

Everything is tuned for human audible range, so dogs will miss out on the higher frequency stuff. Humans did ok with POTS@8kHz with a 300-3400Hz band pass filter though. The internet says dog hearing goes up to ~ 60 kHz; most audio equipment tuned for humans won't go anywhere near that, but probably cleanly carying high frequency up to the limit of the equipment would be better than psychoacoustic compression tuned for humans.