Optical illusions..

**Sonnie** · **07-10-06, 05:19 PM**

I thought these were pretty good...

Is this possible?

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Focus on the dot and move your head back and forth towards the screen. (Don't let others see you doing this... they will think you are gone

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Are you seeing small faint gray circles? Where are they coming from?

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A doozy... this is not an animated image.

**Steve Williamson** · **07-14-06, 04:51 AM**

I saw something like this from a projector site, they gave you about 20 of these things to look at and if you got a headache or could't stand it, they stated you should not buy a DLP projector.

**ironhead1230** · **07-14-06, 03:31 PM**

I love optical illusions. That first one reminds me of a Foxtrot cartoon I recently saw in the paper. Welcome to goComics Web Site featuring FoxTrot - Online Comics, Editorial Cartoons, Email Comics, Political Cartoons

Here's another good illusion.

"If your eyes follow the movement of the rotating pink dot, you will only see one color, pink. If you stare at the black + in the center, the moving dot turns to green. Now, concentrate on the black + in the center of the picture. After a short period of time, all the pink dots will slowly disappear, and you will only see a green dot rotating if you're lucky! It's amazing how our brain works. There really is no green dot, and the pink ones really don't disappear. This should be proof enough, we don't always see what we think we see."

-Mike
"Of course the car made it home, you're calling me at home."

**Sonnie** · **07-14-06, 05:30 PM**

That is way too wierd.

**Steve Williamson** · **07-14-06, 09:16 PM**

This is the page I was looking for: DLP Sensitive? How do I know if DLP may effect me?

**Sonnie** · **07-14-06, 11:55 PM**

Some of those did what they stated... some I couldn't tell. Pretty neat. None of them bothered me.

**JimP** · **07-15-06, 05:25 AM**

Quote:

Steve Williamson wrote:

This is the page I was looking for: DLP Sensitive? How do I know if DLP may effect me?

Entertaining, yet not entirely acccurate as the 2006 models coming out are an improvement over earlier generations and may or may not exibit the same effects.

**Steve Williamson** · **07-15-06, 10:27 AM**

I agree with you fully, however, until they bring out DLP units that show no sign of the rainbow effect I won't be buying one.

Can you imagine bringing home a new girlfriend to impress her with your 120" screen only for her to go home with a headache

**JimP** · **07-17-06, 07:25 AM**

Steve,

That's exactly what Samsung is doing with their soon to be released LED DLP sets. It may take a couple of years to get traction and work the bugs out.

**Alan Brown** · **08-20-06, 01:56 PM**

Some users may still have problems with LED. LEDs are either on or off and can only be dimmed by using pulse width modulation at varying rates. This on/off modulation may disturb some viewers if dimming will be used to adjust image luminance. Some people say they are sensitive to interaction of some modulation rates with display refresh rates and video field/frame rates.

If the LED display illumination is always on, it shouldn't contribute any modulation interferance. These issues will ever be a challenge in digital imaging. Most folks aren't so sensitive. After all, film projection uses 48 images per second, NTSC and ATSC video uses 60 fields and 30 frames per second, magnetic fluorescent ballasts operate at 60Hz, etc.

Best regards and beautiful pictures,
Alan Brown, President
CinemaQuest, Inc.
ISF, THX, SMPTE, CEDIA

"Advancing the art and science of electronic imaging"

**F1 fan** · **08-20-06, 10:13 PM**

Wow that pink dot one is wild.

**11-21-06, 03:09 AM**

Sonnie

LOL, maybe this should entitle LSD! Those rotating discs where making me dizzy! I mean it!

The first image looks like Saturn, I mean when you look though the telescope the image is 2-dimensional well it only appears that way, I don’t know if I’m looking at it from a downward profile angle or from an underneath angle.

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