HDR heatmaps and torch mode UHDs

[Mierzwiak]

Originally Posted by Fjodor2000

Ok, but I still think this value looks way too high:

MaxFALL 4864 cd/m2

None of the analyzed screen caps for that movie are anyway near that bright (instead ~100 cd/m2 FALL)

Huh? Look at the graph:

Originally Posted by TbeRw01

[Fjodor2000]

Originally Posted by Mierzwiak

Huh? Look at the graph:

Look at the heatmaps analysis:

https://forum.blu-ray.com/showpost.p...&postcount=544

See the "Average light level" specified in those images. It's max ~100 nits, for the brightest images.

So there seems to be a disagreement between those images and the graph you posted. Or the images that were analyzed happened to be much darker than the brightest ones in the whole movie.

[Fjodor2000]

@Macatouille:

Have you been able to find any image from "Bad Boys (1995)" that has a FALL close to the MaxFALL of 5160 nits specified in the graph posted by Mierzwiak (or 4864 nits specified in the disc's metadata)?

Would be interesting to see what kind of content those images show if actually using that high FALL.

[dorian]

Originally Posted by Fjodor2000

@Macatouille:

Have you been able to find any image from "Bad Boys (1995)" that has a FALL close to the MaxFALL of 5160 nits specified in the graph posted by Mierzwiak (or 4864 nits specified in the disc's metadata)?

Would be interesting to see what kind of content those images show if actually using that high FALL.

This is the MaxCLL frame:

[Show spoiler]

This is the MaxFALL frame (from a flash):

[Show spoiler]

The values aren't identical due to rounding errors.

[Fjodor2000]

Wow, that MaxFALL image at 4507 nits is insane!

Not that any currently available TV will be able to display it as bright as intended. But one day when we have TVs capable of full screen brightness at 5000 nits, people will get blinded!

[Mierzwiak]

Originally Posted by dorian

This is the MaxFALL frame (from a flash):

[Show spoiler]

[Macatouille]

Originally Posted by Fjodor2000

@Macatouille:

Have you been able to find any image from "Bad Boys (1995)" that has a FALL close to the MaxFALL of 5160 nits specified in the graph posted by Mierzwiak (or 4864 nits specified in the disc's metadata)?

Would be interesting to see what kind of content those images show if actually using that high FALL.

dorian beat me to it, but this was the highest I had in my shots (same scene that he used):



I don't specifically look for high light levels when I pull shots. I have ffmpeg set to pull a screenshot every 30 seconds and then I delete any blurry ones or duplicates (like if there's a shot/reverse shot in the same environment we only need one of those). I'm just trying to get a sample of the different lighting conditions. It's definitely not a definitive survey.

[Macatouille]

Blade Runner (1982)
The Final Cut

Mastering display luminance              : min: 0.0050 cd/m2, max: 4000 cd/m2
Maximum Content Light Level              : 1655 cd/m2
Maximum Frame-Average Light Level        : 117 cd/m2

Heatmaps

[Show spoiler]

Gamut Visualizations

[Show spoiler]

HDR10 Plot

[Amano]

Originally Posted by Macatouille

Updated my old Akira post with gamut visualizations and luminance info.

The results are fairly surprising, especially given the fact that I only used 40 screenshots (I post about 100 per movie now).






Here are the gamut visualizations for the explosion at the beginning (I pulled the heatmaps for this sequence afterword, by request):

[Show spoiler]

Wow, that's some heavy use of rec2020 colours. I think that is the most intense use I have ever seen.

[TbeRw01]

THE FLASH 2023 WEB

To those not familiar with the slow.pîcs website, you can switch frames with your keyboard up/down arrow. Left/right arrow to switch between heat and gamut.

48 heat and gamut map: https://slow.pics/c/ExdSl2Pu
HDR10/SDR/DV PLOT: https://slow.pics/c/aRkSVs7b

[Macatouille]

Battle Royale (2000)

Mastering display luminance              : min: 0.0001 cd/m2, max: 1000 cd/m2

Heatmaps

[Show spoiler]

Gamut Visualizations

[Show spoiler]

HDR10 Plot

[Fjodor2000]

Originally Posted by Macatouille

Rec.2020 pants. Latest fashion. Where can I buy those?

[Macatouille]

Godzilla (2014)

Mastering display luminance              : min: 0.0050 cd/m2, max: 4000 cd/m2
Maximum Content Light Level              : 498 cd/m2
Maximum Frame-Average Light Level        : 92 cd/m2

Heatmaps

[Show spoiler]

Gamut Visualizations

[Show spoiler]

HDR10 Plot

[nissling]

Originally Posted by dorian

HDR Heatmap Colab Notebook

A big, big thank you for your fantastic work.

I recently bought a BD-XL reader for my PC and will start doing some analysis. Some of the titles I'll be looking at are the following:

Rad
Flesh for Frankenstein
The Inugami Family
They Live
Lost Highway
Ready Player One
Howards End
Bayan Ko
Fear and Loathing in Las Vegas
The Natural
Leon (Sony)

And a few others. If any of these are of extra interest, or if any of them already have been analyzed, please let me know.

[nissling]

So I just did my first attempt and it ended up being The Natural. Respectable averages and several really spectacular shots. Most colors are within the BT.709 color gamut yet look very good.

Heatmaps

[Show spoiler]

Gamut Visualizations

[Show spoiler]

[nissling]

Fear and Loathing in Las Vegas.

Absolutely phenomenal usage of both HDR and the wide color gamut. I'm stunned.

Heatmaps

[Show spoiler]

Gamut Visualizations

[Show spoiler]

[Labor_Unit001]

Originally Posted by nissling

A big, big thank you for your fantastic work.

I recently bought a BD-XL reader for my PC and will start doing some analysis. Some of the titles I'll be looking at are the following:

Rad
Flesh for Frankenstein
The Inugami Family
They Live
Lost Highway
Ready Player One
Howards End
Bayan Ko
Fear and Loathing in Las Vegas
The Natural
Leon (Sony)

And a few others. If any of these are of extra interest, or if any of them already have been analyzed, please let me know.

I'm particularly interested in seeing The Inugami Family analyzed.

[nissling]

I'll get there.

Lost Highway

Conservative color timing but the impact of HDR is still very powerful. Especially thanks to those flashing moments. There is still some white clipping however at various levels. The nude scene also show some FPN which makes me believe that the negative has had very high density and thus difficult to digitize. It's extremely minor and not exactly visible during viewing unless you really know what to look for. Colors are very much BT.709 with a few exceptions which I think suits the film great.

Heatmaps

[Show spoiler]

Gamut visualization

[Show spoiler]

[nissling]

Originally Posted by Labor_Unit001

I'm particularly interested in seeing The Inugami Family analyzed.

Here ya go

The Inugami Family

Very much in line with my former post, the HDR is quite discreet but used wisely. There are striking moments and no real sign of clipping caused by grading, making it a pleasant presentation in terms of brightness. Colors are mostly restricted to BT.709 but it does reach DCI-P3 on occasion. The only real drawback is the noise reduction.

Heatmaps

[Show spoiler]

Gamut visualization

[Show spoiler]

[Macatouille]

Bad Boys 2 (2003)

Mastering display luminance              : min: 0.0050 cd/m2, max: 4000 cd/m2
Maximum Content Light Level              : 10000 cd/m2
Maximum Frame-Average Light Level        : 1367 cd/m2

Heatmaps

[Show spoiler]

Gamut Visualizations

[Show spoiler]

HDR10 Plot