YCbCr
YCbCr
- Subject: YCbCr
- From: "Scott Ettin" <email@hidden>
- Date: Tue, 26 Jun 2007 16:25:49 -0400
- Thread-topic: YCbCr
Marco,
I run a digital media services department at Postworks in New York City.
Clients give us their SD & HD tapes and we often get requests for image
sequences, notably TIFF & TARGA files.
We use an AJA Kona 3 card in our Quad G5s to 8 & 10-bit uncompressed
Quicktimes and then export stills after capture.
The reason that I wanted to see a YCbCr profile in Color Sync is because
those still images exhibit dramatic chroma and luma clipping.
When I use Maximum Throughput's Sledgehammer, there is no resampling of
color and luminance.
I'm trying to understand why. I have read this from Apple's Quicktime
Developer page:
http://developer.apple.com/quicktime/icefloe/dispatch027.html
Scott
Message: 3
Date: Sat, 23 Jun 2007 12:44:04 -0700
From: Marco Ugolini <email@hidden>
Subject: Re: YCbCr Profile
To: ColorSync Users Mailing List <email@hidden>
Message-ID: <C2A2C614.F9CB%email@hidden>
Content-Type: text/plain; charset="US-ASCII"
In a message dated 6/22/07 12:54 PM, Scott A. Ettin wrote:
> Hello list. I've just joined and have a question.
>
> I am looking for a YCbCr profile that I can load in ColorSync so that
> I can view the color model and compare it to RGB.
>
> Can someone point me to an .ICC profile I can download?
A note of warning regarding YCbCr:
"YCbCr is not an absolute color space. It is a way of encoding RGB
information, and the actual color displayed depends on the actual RGB
colorants used to display the signal. Therefore a value expressed as
YCbCr is only predictable if standard RGB colorants are used, or if an
ICC profile is attached or implied which is used to translate value for
the colorants in use."
<http://en.wikipedia.org/wiki/YCbCr>
Marco Ugolini
_______________________________________________
Do not post admin requests to the list. They will be ignored.
Colorsync-users mailing list (email@hidden)
Help/Unsubscribe/Update your Subscription:
This email sent to email@hidden