Change Colour Or Shape Of An Object At Distance

Its a builder in his High Visibility cloth approaching a fire which at 10 m turns him black.

The term should be: "Dont get to close to the fire" or in short "keep out".

It did not matter where the builder came from the outcome was the same!

Is this dress "white and gold" or "blue and black"?

http://www.bbc.co.uk/news/uk-scotland-highlands-islands-31656935

Ok you stand at 10 meters away from a flat piece of red card 100mm square which is against a wall. You can see it is red in colour. As you get closer the colour changes to a different colour. Can this be achived by a prism imprinted on to the card or what can be used.

How about an electrical sensor which turns LEDs to the color you need?

Whats the application? What would the color change achieve? Is it for humans?

Seems to be a solution looking for a problem.

Just what the world (of criminals) needs. A shape-shifting, color-shifting, driverless get away car, with no Lo-Jack. Can the astute bank robber order that, in police car - taxi - police car shift? Can it be ordered with tail mounted 0.30 cal MG x 8?

Does in come standard with black tinted windows that can be activated as a TV screen, that show up as Andy Germany's dog driving? How about just a really loud recording of a red neck yelling "Get out of the way, I am late to NASCAR."

....shape-shifting, color-shifting, driverless get away car, with no Lo-Jack. Can the astute bank robber order that, in police car - taxi - police car shift.....

That's odd, nothing I like more than a pip with a nice pair of:

• gams,
• pins
• drumsticks
• pillars
• stems
• get-a-way sticks

oh, wait, are we talking about the same thing?

almost hasta be. With gams like that, she don't need no stinkin' get away car, she needs come here car.

I'm not sure if this is a naked eye observation or not. If this is a naked eye viewing this might be one of the variety of optical illusions our mind and eyes can perform.

Does the naked eye see people without their clothes on? That could be a really bad vision (optical allusion) in some places in the world. Poor spelling leads to serrendipitous humor, IMHO.

It's an orange colored piece of paper stuck to a white wall. The sun is low in the sky behind you. As you move from 50 meters to 10 meters, your shadow covers the paper making it appear black.

You might be thinking of "metamerism" where the apparent colour of an object depends on the lighting source. (wavelength and spectral distribution)

Moving from 50m (far away) to 10m (much closer) could change the perceived colour by changing the relative viewing angle and definitely the real intensity due to inverse square law.

You might also be observing a "retroreflective" device (similar to car bumper reflectors) where the reflection path is very tightly defined (typically 0.25 degrees from incident light axis). From a great distance, with the light coming over your shoulder you see the amber reflection. Once closer, your eyes are outside the reflected light path, no reflected light creates an apparent "black" object.

Spent a little time in colour matching for auto industry and photometric testing including reflectors.

In automobile paint I have heard it is called with white paint, the pearl color or pearling. A standard color with one even layer of pearl white then lots of clear, where when in shadow or shade the orginal color bleeds through. mostly used with black that gives a grey or purple color at night.

One of several possible solutions.

The technology is called a "spray paint gun".

The terminology used is "painting"

It is achieved by having a person standing at the 10m distance and spraying the object with paint.

It is a prison inmate in orange jumpsuit, attempting to use the HV electrified fence as an escape route, and new prison death ray engages when inmate is within the polarization range of the fence. At 10 meters, I estimate the fence needs to be charged to something like 250 kV, but the part I fail to get is how they keep it from shorting directly to the ground. There must be some outstandingly good insulators on the upper concertina wire.

Are we seeking a way to foil license plate cameras ??

Aluminum foil crinkled up and cupped over the license plates (to appear as trash sticking to the license plates fortuitously) will foil the license plate cameras at monitored stop lights. The problem is that they will get you some serious attention from State Troopers, Local LEO's, and other interested parties that might want to stop you to see what you are about, and why you have foil over your license plates. Lucy.....! You got some 'spainin' to do!

Curses - foiled again.... THAT kind of 'foil'.

Scripting color or shape changes of objects contingent on proximity is quite easy in SecondLife™.

As for RL I can picture a color change being possible due to the simple change in angle of parallax from the viewer's perspective. Example: Bundle a bunch of white drinking straws and place them against a black wall. From a distance you can look down through the centers of most of the straws and not see the white edges very much so you mostly see the black wall. Closer, only the few straws perpendicular to you would show the black wall whereas most of the view would be dominated by the white walls of the straws.

I can imagine a particular change of shape, but only in the singular case of approach from a single direction via a change in the profile from one perspective vs another.