Rainbows on Neckties?

[actionhank]

I've always noticed this but never really paid attention to it, but how come whenever I watch CNN or CNBC or Fox News (or whatever) in SD and they're showing a guy with a necktie I always see some sort of rainbow on the tie if I focus my eyes on it?

Does it have something to do with my old Sony CRT HDTV (kp65ws500)? Can't it display all the colors in the tie?

Does it also happen in blu-rays in HD?

[dmxoneiuv]

what are you smokin' bro? they all look normal to me, no rainbows here...and i do look at the ties people wear when watching tv, kinda have a little collection going on

[WickyWoo]

That's the inability of SD to resolve the fine details on the tie. So no it doesn't happen on a properly done blu-ray

[seto]

Sounds like good old SD playing tricks on your eyes. @_@

[Shadowself]

Without knowing any of a hundred different details of the ties/cameras/resolutions/displays involved - or what you mean by "rainbow"... one guess of what might be going on is a moire effect.

[Sylin]

Heh... stay off the shrooms.

j/k

Me thinks this happens for 1 of 2 reasons. Either the particular necktie is "shiny" (like all the fashionable ones are... do you hear me, Shanon Sharp!?) and what you see is a prism-like effect as a result of light interacting with the tie. OR it's that the tie has some intricate patterns on it and the camera being used cannot resolve it in detail, resulting in a blend of colors/rainbow effect.

I see it, too... just not on every tie.

[Luis_A51]

I see it too on stripped ties or ones with checker patterns. Its called the Moire Effect. I only see it on SD cable feeds though, never on blurays.

[Lee Christie]

Hmm.. on the news? I would think that they would know not to wear a tie that's going to have a moire effect, the camera man would see it on his monitor before they start broadcasting and ask the guy to remove it.

[MaleManGuy]

Good cameras typically will record the moire effect i noticed... and the heavier the aliasing filter the less moire but the less sharpness as well. It may be unavoidable without losing sharpness.

[Sylin]

Originally Posted by MaleManGuy

Good cameras typically will record the moire effect i noticed... and the heavier the aliasing filter the less moire but the less sharpness as well. It may be unavoidable without losing sharpness.

I'm tellin' you, check out Shanon Sharpe's tie during the Super Bowl broadcast (if he's part of whatever 9-man army of commentators the NFL picks). His ties always show this effect. He must be big on patterns.

[bageleaterkkjji]

maybe their neckties are rainbow colored in the first place