Fast and Ferious HDR, high dynamic range.

[Ed P]

Colour and resolution are very personal things. For myself, colour is more important than resolution and a true 10bit 4K is a step change improvement over a cheaper 8bit 4K. [edit] The Samsung SUHD canyon shot demonstrates this improvement link

I recently sold off my old Canon photographic equipment and splashed out on a Panasonic Lumix DC-GH5 that has 10bit capability video capability. (and HDR on the fly). It makes my old Canon look like something out of the ark. (imo as a photographic company Canon have completely lost the plot and are well behind in their technology).

HDR is however something else. When used subtly it has the capability of enhancing pics with areas of strong light and shade in a very natural manner. (The classic example is a photo of a wedding group inside a church). However it is also capable of making pictures look garish and artificial. I suspect that one person’s HDR setting may well be something that others hate – for that reason I’m not sure about using any HDR tweaks on a family TV. I’m happy just to take the 4K 10bit colour as it comes. (great for footie btw)

[Wheels-Of-Fire]

I think I have a handle on a single shot HDR photo. You take three shots in quick succession. One over exposed so you get the shadows, one under exposed so you get the high lights and and a middle one to act as a refference. Then you average them to get HDR.

A always could be wrong ?

[Wheels-Of-Fire]

Trouble with vieo is we can average between frames and play all kinds tricks

[Wheels-Of-Fire]

The more information there is in the sourse material the more it can be post procecessed

[Ed P]

Unfortunately 10 bit colour is obviously better than 8bit colour, but it still leaves >40% of the visible spectrum invisible to the camera/tv. This chromaticity diagram shows indicatively what is missing from 10bit HDR TV. (mostly the deep blues and reds are chopped off. (The triangle indicates the range covered by hgl rec 2020. )

Relative to this, the following table gives the ranking order for how well HDR TVs actually meet the rec2020 spec. link

If you eyeball the colour gamut for these tv sets you will see that not all hdr tvs are born equal!

Wrt HDR photos what you said Wheels was essentially correct. This video shows how to do it (and why ) on the Lumix it also shows some of the ‘nasty’ results that can be obtained with hdr.

[Wheels-Of-Fire]

You are absolotely right Ed. More shades of colour seem more ralistic to the human eye than more resolution.

And you win. Your 10 bit panel is better than mine ?

[Ed P]

MY ’10 bit’ sRGB panel is an Asus PB279Q – getting a bit old now and Asus played a dirty game in that any 10bit colours are only  achieved through dithering.However even today it is very hard to find a monitor that does better than sRGB

You definitely win the panel prize.

I’m afraid I cannot afford the ColorEdge Monitor I’d like to have!

[keith with the teef]

@Wheels-of-fire.

I think most modern tellies are a mare to configure.

Auto settings are is to be avoided or you will not get what you paid for.

[The Duke]

Configure a tv. All I do is turn of the dynamic showroom setting, pig in a roku, and run the tv to hdmi1. Then never touch it again.

Also loose every remote withing a week. Well by lose I mean put them somewhere safe, and never remember where. Everyone uses their phones to operate our boxes.

[Author]

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