Huh? I don’t get it.

[tecboy]

 

[KmH]

None of that is new information.
What he doesn't really get into is how/why light intensity/brightness/area can make a small dim white light look black when compared to a large bright white light.

Color, and light, are way more complex than many realize and the science involved is also complex.
And as he says, it's been known for a long long time that each person does not necessarily perceive color the same.

If you really want to understand the subject, get this book:
Color Science: Concepts and Methods, Quantitative Data and Formulae

Factor in too that the video camera he uses changes the exposure settings to compensate for a larger, brighter light or a smaller, dimmer light in the case of projecting the small projector onto the large bright surface.

 

[Gary A.]

White is white and black is black ... what he was calling black was actually a very dark gray.

 

[tecboy]

I think he doesn't explain aperture of a camera or iris in the eye. The iris reduces bright light of a softbox to compensate the overall brightness. So, the light on the iPhone gets darker. The light of a softbox is brighter than the light on an iPhone.

 

[Overread]

Sometimes topics like this start to not make sense because the greater understanding/explanation is missing. The bits that get glossed over/skipped/missed out add up and you end up with a conclusion that leaves you surprised, but also confused.

Honestly this video doesn't really give someone much to work with and doesn't mention dynamic range nor exposure in relation to the camera recording the image. The concept of the colours also is not properly covered at all (eg he says that colour is subjective but at the same time doesn't explain it fully - not even touch upon how things like hardware calibrators for monitors and printers can work if colour is only ever subjective).

 

[compur]

Gee, a light can seem dark when in front of a much brighter light.

What a life-changing revelation.