Color Checker...

[Evin Grant]

You asked for it, you got it.

First a screen cap of the Red Alert settings, as you can see all I did was set an aproximate white balance and tint.

http://www.reduser.net/evin/colorchekkerSS.jpg

And the .tiff

http://www.reduser.net/evin/macbeth.tiff

Please give this a 1/2 hour to upload.

[Karl H]

Evin, the histogram on Red Alert, is that identical to the one you can have in the display on the Red One? I like how it shows the three channels

thanks

[Brook Willard]

Nice! Thanks for posting it, Evin.

If memory serves, this was lit by a tungsten-globed fat man from the left side and a 650w hitting somewhere from the right. There was also a general ambient tungsten glow in the room from the other lights we had up.

[Justin Kirchhoff]

Anyone recall what it was exposed at?

[Brook Willard]

Probably around F:3@500?

[Joel Kaye]

sweet. Looks good (flat) to me. Keep popping that thing in the scene when you can. It'll give you guys a great reference when you're color correcting too of course.

[Michele Gavazzeni]

isn't a little too washed out?

[Jannard]

isn't a little too washed out?

Flat is good... you can always "spice it up" before output later in the food chain. There are controls to snap it up in RED Alert! if you need to see it "right now".

Evin... note the difference in R, G & B where they clip at the high end. You can use DRX to adjust those. Looks like you need a value of about 1.0 in the DRX box.

Jim

[Chris Nuzzaco]

Interesting, so do the channels clip at different times depending on your white balance settings? I work with a modded DVX Andromeda, and when shooting 10 bit linear (12 bit linear coming soon!) I've always noticed that the various channels clip at different times depending on the white balance settings, of course, its a 3 CCD camera and RED isn't, but I can't help but wonder. Also, when your shooting red, is it possible to view the linear response of the sensor? Thats one of the coolest things about the Andromeda system.

[Evin Grant]

Cool, thanks. I was wondering what those were for.

[Joel Kaye]

isn't a little too washed out?

Download the tiff and then color correct it. He's just posting the raw data - which is what we want to see.

You'll also notice there is a great difference between how your web-browser-displays-a-screen-capture-jpeg-of-a-frame-within-another-app (do that math on all that) and how Photoshop displays the 50 meg tiff of the actual frame.

[Anders Holck]

Some great stuff showing up all over, although REDUSER is crawling along very slowly at the moment...

[Graeme Nattress]

Sure, turn off matrix and set to linear light, and that's raw sensor data debayered for you.

I've been looking at some white point stuff today that might improve things further.

DRX is cool code which fixes off-colour highlights (usually purple / pink tinged) caused by green being brightest and clipping first. Much nicer to fix with DRX and claim that lost highlight data as dynamic range, rather than let it go to waste.

Graeme

[Chris Nuzzaco]

Sure, turn off matrix and set to linear light, and that's raw sensor data debayered for you.

I've been looking at some white point stuff today that might improve things further.

DRX is cool code which fixes off-colour highlights (usually purple / pink tinged) caused by green being brightest and clipping first. Much nicer to fix with DRX and claim that lost highlight data as dynamic range, rather than let it go to waste.

Graeme

I totally agree about fixing the highlights in post. I've also noticed, at least with Andromeda, I can get images with lower noise levels when shooting under 3200 K if I white balance on magenta instead of white. This of course produces some weird looking green footage, but since I'm recording the raw sensor data, color correction in post is feasible. Does Red work the same way? Or I guess I should say, "can" red work this way?

[Graeme Nattress]

What you white balance on in camera has no effect on the RAW output.

Graeme

[Justin Kirchhoff]

I love RAW data...It's truly impressive that I can white balance to hell and still retain all the data.

[Graeme Nattress]

:-) So do I - it's so much fun what you can do with it. And as image processing algorithms improve, so does your old footage.

Graeme

[Justin Kirchhoff]

Graeme, you're a work horse....not to get off topic, but how did you learn about all this stuff?

[WesG]

and how can we learn about it???

Any tips on how we can best prepare to take delivery of RED and have a basis of knowledge that will assist in learning how to maximise the camera's technical image making abilities??

[Emanuel A.]

Flat is good... you can always "spice it up" before output later in the food chain. I can be wrong but I have the same impression here.

[jbeale]

Evin: first, thank you so much for posting the Macbeth chart! This has all kinds of potential.

There is software that can extract many interesting numbers from this (one I use is from www.imatest.com but it's mostly of interest to the real tech geeks). Having it slightly out of focus is good (permits analysis of imager noise independent of surface texture). On this particular shot, it looks good to my eye, but the software is making snide comments about lighting uniformity (?)

Also I don't know what color temp. light you had; not fluorescent by any chance? If you have time to take that shot again with really uniform lighting and some well-known light (tungsten is easiest, or sunlight) with known color temperature (eg. not mixed lighting) that would be very interesting for me.

No doubt you didn't intend this shot for quantitative analysis, I'm sure you're super busy and have much else to do! Thank you once again for all the work you've done and put online for all of us.