There were 6 severe haze events over a large area of the Yangtze River Delta (YRD) region in January 2013. In this study, based on the hourly concentrations of trace gases and PM2.5 at 10 observation stations (8 city stations, 1 regional background station and 1 island station) during Jan. 1–31, 2013 as well as the concentrations of water-soluble ions at 5 stations (4 city stations and 1 region...

orneal haze is the most serious complication of photorefractive keratectomy (PRK) and has been attributed to normal healing processes. 1-3 The prediction of which patients are likely to develop haze is of the utmost importance in the evaluation of patients for PRK. We noted that while removing the epithelium prior to corneal ablation, three distinct types of cornea can be appreciated: 1) normal...

In this paper, we implement a dehazing algorithm using dark pixel detection in MatLab and C++/OpenCV. The algorithm is originally proposed in Yu et al.’s paper. The simplicity and effectiveness of the algorithm make it possible for us to run the C++/OpenCV implementation on Android phones through android NDK with reasonable speed. Keywords—dehaze; image processing; mobile application; computer ...

xcimer laser photorefractive keratectomy (PRK) has been used for some years all over the world. It was introduced to Kuwait in October 1994; 621 eyes had PRK for myopia with and without astigmatic error between October 1994 and June 1996. Refractive correction was successfully achieved within ±0.50 diopters (D) in 80% of eyes. Uncorrected visual acuity of 0.8 (20/25) or better was achieved in 7...

The mammalian retina seems far smarter than scientists have believed so far. Inspired by the visual processing mechanisms in the retina, from the layer of photoreceptors to the layer of retinal ganglion cells (RGCs), we propose a computational model for haze removal from a single input image, which is an important issue in the field of image enhancement. In particular, the bipolar cells serve t...

Haze removal has been a very challenging problem due to its ill-posedness, which is more ill-posed if the input data is only a single hazy image. In this paper, we present a new approach for removing haze from a single input image. The proposed method combines the model widely used to describe the formation of a haze image with the assumption in Retinex that an image is the product of the illum...

The monoclonal antibody (MCA) SucroTest is a commercially available kit (Midland Research Laboratories Inc) for the specific analysis of dextran in juices and sugar. The method is simple and quick and is based on the selective and specific reaction between the antibody and its antigen (in this case dextran). The resultant insoluble complex causes turbidity which is measured after a set time usi...

In this paper a novel method for removing haze is given which is based on the Hue Saturation Value color model together with dark channel subtraction. Single image fog/haze removal is a challenging task due to its ill posed nature. As fog/haze increases the brightness of the images captured also increases. In the current wok, a new methodology has been used which involves the subtraction of ext...

At wavelengths from the near-ultraviolet (0.2 μm) to the infrared (5 μm) Jupiter’s appearance is dominated by contrasts produced by clouds and haze. It is important to understand the distribution and optical and physical properties of cloud and haze particles because they play a major role in the radiative heat budget, and they can tell us about atmospheric processes such as stratospheric circu...