ginaspider ([info]ginaspider) wrote,
@ 2008-04-27 10:22:00
Previous Entry  Add to memories!  Tell a Friend!  Next Entry
Dear lazyweb,

I don't get it. What's the difference between YUV, Y-Cr-Cb, Luma-Hue-Saturation? These all seem interchangeable to me.

Also, how is gray represented in these systems? It makes sense to me in Luma-Hue-Saturation (just have zero saturation) but how about Chroma-Red, Chroma-Blue? What the fuck is chroma-red and chroma-blue?

(Post a new comment)


[info]vossanova
2008-04-27 11:32 pm UTC (link)
Trixter is a much bigger expert on this color stuff than I am, but these should help:

http://en.wikipedia.org/wiki/YCrCb
http://en.wikipedia.org/wiki/YUV
http://en.wikipedia.org/wiki/HSL_and_HSV

(Reply to this)(Thread)

[info]ginaspider
2008-04-28 02:16 am UTC (link)
Does trixter have an lj?

(Reply to this)(Parent)(Thread)

[info]vossanova
2008-04-28 02:20 am UTC (link)
No, but he does have a blog at trixter.wordpress.com - lots of interesting stuff there.

(Reply to this)(Parent)(Thread)

[info]vossanova
2008-04-28 02:21 am UTC (link)
Oh, and I made an lj feed "trixterblog" for it.

(Reply to this)(Parent)(Thread)

[info]ginaspider
2008-04-28 02:34 am UTC (link)
Hmm.. well, for now I think i'll just go with hsl for my application. I still don't understand where Cr Cb comes from. Wikipedia says it represents, on color television, the color-sub-carrier's phase and amplitude. Those, as I read somewhere else, represent chroma and saturation. Then I also read that UV is the same as CrCb (one's digital one's analog?) but I look at the UV grid on wikipedia at it doesn't look like saturation, there is no gray. Chroma-red Chroma-blue? It's seems kinda bizzar, it doesn't intuitively strike me why this color-space. Chroma makes sense to me, it relates to radio-frequency-spectrum. CrCb? I guess I'll start researching the history of this.

(Reply to this)(Parent)

Create an Account
Forgot your login?
Login w/ OpenID
English • Español • Deutsch • Русский…