In extremely clean air in Arctic or mountainous areas, the visibility can be up to 70 kilometers (43 mi) to 100 kilometers (62 mi). However, visibility is often reduced somewhat by air pollution and high humidity. Various weather stations report this as haze (dry) or mist (moist).
Fog and smoke can reduce visibility to near zero. The same can happen in a sandstorm in and near desert areas, or with forest fires.
Heavy rain (such as from a thunderstorm) not only causes low visibility. Blizzards and ground blizzards (blowing snow) are also defined in part by low visibility.
Conventional vision systems are designed to perform in clear weather. Needless to say, in any outdoor application, there is no escape from “bad” weather. Images taken in poor weather conditions suffer from severe color and contrast degradation. Furthermore, this degradation worsens exponentially with distance making it impossible to acquire meaningful images of scenes that are not near the imaging system.
This is where LYYN comes in.
LYYN does not perform magic. It just seems that way sometimes…
Read more about LYYN applications in the following sub pages:
Fog, Mist and Haze
Want to see what is going on in the fog? Just add a LYYN real-time video enhancer to your CCTV system!
Definitions
The international definition of fog is a visibility of less than 1 kilometer (3,300 ft); mist is a visibility of between 1 kilometer (0.62 mi) and 2 kilometers (1.2 mi) and haze from 2 kilometers (1.2 mi) to 5 [...]
Smoke
Smoke particles are an aerosol (or mist) of solid particles and liquid droplets that are close to the ideal range of sizes for Mie scattering of visible light. Depending on particle size, smoke can be visible or invisible to the naked eye. This is best illustrated when toasting bread in a toaster. As the bread [...]
Rain
Rain reduces visibility in several ways and is especially debilitating at night. It both directly affects perception (seeing through rain) but also produces visibility changes through its action on lights, the camera housing or lens and the observed scene itself. We normally see an object when light from a source, the sun, street lamps, etc, [...]
Snow
There are many visibility problems caused by snow, mainly because of snowflakes or droplets in the air. Especially since the low weight of snowflakes make them sensitive to the slightest of winds. With strong winds, like in blizzards, visibility can come down to almost nothing.
Meteorological definitions
Blizzards are defined as winter storms with sustained or gusting [...]
Dust
Dust storms can occur anywhere there is loose soil, little to no vegetation and strong winds. This combination is mostly found in the world’s deserts. In the Sahara, for example, sand dunes dominate and strong winds occur often. Without vegetation to hold it in place, sand and dust lift easily in the wind.
Another region with [...]
Lowlight
Does low light mean “no light”?
The human eye has the ability to see millions of shades of color. But when evolution developed this fantastic image sensor, something was sacrificed; our ability to see in darkness. This has been a challenge for mankind since we lived closer to nature. Many of the big predators, like tigers and [...]
Underwater
The key to successful underwater vision is getting rid of the water! This cliché is as old as underwater photography itself, but it’s still true today. Depth, distance, lighting, turbidity of the water, salinity, and pollution all contribute to the visibility, and the perception of size, shape, and color of underwater objects. Adding the abilities [...]
