Outdoor images often suffer from low contrast and limited visibility due to haze, small particles such as dust, mist, and fumes which deflect light from its original course of propagation. Haze has two effects on the image: it weaken the imgage contrast and also adds an additive component to the image, so-called airlight. Recovering a haze-free image can restore the visibility of the scene and ...

One of the major issues related to dehazing methods (single or multiple image based) evaluation is the absence of the haze-free image (ground-truth). This is also a problem when it concerns the validation of Koschmieder model or its subsequent dehazing methods. To overcome this problem, we created a database called CHIC (Color Hazy Image for Comparison), consisting of two scenes in controlled e...

[1] Images from the Hubble Space Telescope (HST) document the seasonal migration of haze in Titan’s atmosphere. Image profiles show darkening of the north relative to the south at 439 nm (blue) but no change at 619 nm. The limb profile at 889 nm has inverted, becoming north-bright, a variation consistent with haze transport towards the winter hemisphere by winds. The complex altitude-time varia...

Haze in China has been increasing in frequency of occurrence as well as the area of the affected region. Here, we report on a new mechanism of haze formation, in which coexistence with NOx can reduce the environmental capacity for SO2, leading to rapid conversion of SO2 to sulfate because NO2 and SO2 have a synergistic effect when they react on the surface of mineral dust. Monitoring data from ...

This project is designed to monitor heavy haze, described as a pall of smoke caused widespread health problems especially among the elderlies, the young and kids. Haze is an atmospheric phenomenon where dust, smoke and other dry particles obscure the clarity of the sky. This haze pollution has serious implications to health as well as for the whole environment. This project described a mobile m...

Anshu Kumari, M.Tech Student (Digital Communication), Vits, Bhopal, India Amarjeet Kumar Ghosh, Assistant Professor (Electronics & Communication), Vits, Bhopal India ----------------------------------------------------------------------***------------------------------------------------------------------Abstract:Scattering, along with absorption, causes attenuation problems with radar and other...

In this letter, we propose a novel and effective haze removal method by using the structure-aware atmospheric veil. More specifically, the initial atmospheric veil is first estimated based on dark channel prior and morphological operator. Furthermore, an energy optimization function considering the structure feature of the input image is constructed to refine the initial atmospheric veil. At la...

Image de-hazing is an important and challenging research topic in computer vision. Visibility in poor weather condition is severely degraded by scattering of light due to suspended particles in the atmosphere such as haze and fog. In this paper, we propose defogging method for hazed video in vehicles based on haze transmission estimation method to estimation depth of haze. Formation of fog is t...

AIMS/BACKGROUND Since wound healing processes are known to be more rapid in those who are young, it was decided to examine the effect of patient age on refractive outcome of photorefractive keratectomy (PRK). METHODS The records of 599 eyes that had undergone PRK were studied retrospectively. The eyes were categorised by baseline myopia and patient age. Spherical equivalent and corneal haze w...

By analogy with the formation of thin ®lms by deposition of individual atoms, it is proposed that apple juice haze is formed by a similar mechanism, employing a di€usion-limited-aggregation (DLA) model. Envelopes of water insoluble tannin droplets, bounded by a layer of partially coalesced droplets, `hit and stick' to form extensive assemblies of typical particles, of predictable shape. The imp...