Question about DaVinci Parade/WFM scopes

[David Smith]

I am also very confused by the 1023 scale. I’m having film scanned to 10 bit RGB LOG DPX files. I believe 700 is my 100 percent white, but I can go way past it without clipping – but – past 700 the image looks too contrasty.

Also if 700 is my legal white limit – there is no easy to see limit line for 700. So I have to estimate mu top white.

I have also tried to find a way to change the scale to something else – but been unable to find any other setting.

I’m glad you asked this question. It is on my list of questions as a learn Resolve and color grading.

[Rona Gales]

The scale is actually 100 (percent) IRE- 700 mV (1023) and miss represented. Not to worry!!

The God Of Color Of The Universe Will Rise Again!

[Fabio Cormack]

I found this information on the web, does it applies to DaVinci?

” In order to get a resulting clip with a range between 0 and 1023, a 10 bits video format needs to be selected as the transcode’s format.

In YCC 709 (itu.709 is the norm for HD televisions, except some very very old ones that followed SMPTE 240), black is mapped to 16/64 and white to 235/940 in 8/10 bits. Values below 64 (10 bits) are called super black and above 940 super white. The “super” colors are mainly used for color correction as they won’t be noticeable on the television.”

So, It makes me think about the DV waveform scale:

This would mean legal video should be kept inside 64-940 range?

Also, I read the top and bottom 5 points of the 0-1023 10-bit scale are reserved for data only, no Image data is recorded… This would be true for the DV WFM scale?

Fabio Cormack
Davinci 8 – Tangent Wave – Decklink HD Extreme 3D+
Final Cut Suite
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Rio de Janeiro – Brazil

[David Smith]

When I have my film scanned I can see on the waveform the range of data falls between 0-700 (more realistically 100-600). But 700 is the max for the scale (I think, I will check this week – I’m pretty sure it is though)

When I look at the scope of my Resolve the data is still in the same range – although I have a lot more head room to 1023.

I’m not sure why my data range is not converting to the wider numerical range in Resolve.

Is the 0-1023 a Resolve only thing?

[Sascha Haber]

You scanned media is probably logarithmic .
The waveform you are looking to is probably set to scale from 100 to 700 .
Resolve s scope is unscaled and video so your log material will looked washed out and it values are between 100 and 700.
Next step could be to load an input Log2Lin Lut and activate “show on scopes” and then I guess it will fill the scale and “look better”

A slice of color…

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http://www.saschahaber.com

[David Smith]

Do I set that LUT under the LUT tab in the config window? I looked in all the Input Lookup tables but did not see a LOG2LIN LUT…. or am I looking for a specific one?

Or do I need to install or create one?

[Ugonna Igweatu]

According to The Art and Technique of Digital Color Correction:

Pure white is:

100 IRE on a RGB Waveform

255 IRE in RGB color space at 8bit

235 IRE in video color space at 8bit

****1023 IRE in RGB color space at 10bit****

940 IRE in video color space at 10bit