1,830 research outputs found
SLIC Based Digital Image Enlargement
Low resolution image enhancement is a classical computer vision problem.
Selecting the best method to reconstruct an image to a higher resolution with
the limited data available in the low-resolution image is quite a challenge. A
major drawback from the existing enlargement techniques is the introduction of
color bleeding while interpolating pixels over the edges that separate distinct
colors in an image. The color bleeding causes to accentuate the edges with new
colors as a result of blending multiple colors over adjacent regions. This
paper proposes a novel approach to mitigate the color bleeding by segmenting
the homogeneous color regions of the image using Simple Linear Iterative
Clustering (SLIC) and applying a higher order interpolation technique
separately on the isolated segments. The interpolation at the boundaries of
each of the isolated segments is handled by using a morphological operation.
The approach is evaluated by comparing against several frequently used image
enlargement methods such as bilinear and bicubic interpolation by means of Peak
Signal-to-Noise-Ratio (PSNR) value. The results obtained exhibit that the
proposed method outperforms the baseline methods by means of PSNR and also
mitigates the color bleeding at the edges which improves the overall
appearance.Comment: 6 page
The Kato square root problem on vector bundles with generalised bounded geometry
We consider smooth, complete Riemannian manifolds which are exponentially
locally doubling. Under a uniform Ricci curvature bound and a uniform lower
bound on injectivity radius, we prove a Kato square root estimate for certain
coercive operators over the bundle of finite rank tensors. These results are
obtained as a special case of similar estimates on smooth vector bundles
satisfying a criterion which we call generalised bounded geometry. We prove
this by establishing quadratic estimates for perturbations of Dirac type
operators on such bundles under an appropriate set of assumptions.Comment: Slight technical modification of the notion of "GBG constant section"
on page 7, and a few technical modifications to Proposition 8.4, 8.6, 8.
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Expressive Policy Analysis with Enhanced System Dynamicity
Despite several research studies, the effective analysis of policy based systems remains a significant challenge. Policy analysis should at least (i) be expressive (ii) take account of obligations and authorizations, (iii) include a dynamic system model, and (iv) give useful diagnostic information. We present a logic-based policy analysis framework which satisfies these requirements, showing how many significant policy-related properties can be analysed, and we give details of a prototype implementation. Copyright 2009 ACM
Double Murder Following Intoxication with Sedative Drugs
Background: Sedative drugs are important in many ways in medicolegal practice. They are used to subdue or alter the mind of a victim and also such drugs themselves can cause death. These drugs are used in robberies as well as in murder cases.Case Report: Two averagely built healthy parents were found dead on bed with deep cut injuries to neck, with minimal evidence of volitional activities and defense injuries. An involvement of a poison was suspected. The elder daughter had felt a bitter taste of the dinner and kept it in the refrigerator at that night. The dinner was sent for toxicological investigations. Causes of deaths were cut injuries to neck. At the same time, the investigators found out that the younger daughter had mixed diazepam to dinner and her boyfriend and 4 others killed the parents. A film they had watched had influenced them to initiate this incident.Conclusion: Two well-built conscious adult victims in sober state should have received at least few defense injuries or leave evidence of volitional activities. In such circumstances, intoxication with drugs or incapacitated with other means should be considered by the forensic pathologist
Medico-Legal Significance of āSelf-Embedding of Foreign Bodiesā
Self-embedding is a form of self-injury where foreign objects are inserted underneath the skin. Though it is reported in scientific literature, it is not being reported in forensic literature.In the year 2010, a housemaid returned from Saudi Arabia with 24 nails and needles in her body. After arrival, she had not informed that she had been tortured by the employer.Ā Ā Ā Ā Ā Ā In the year 2013, another Sri Lankan housemaid from Middle East admitted to hospital with needles in her body alleged that needles being inserted by her master.Ā X-rays showed 4 needles in her face and limbs, placed parallel to the skin surface. She would have self-embedded these needles in a way to escape from employer.Ā Ā Ā Ā There are cases of self-inflicted injuries in people with Munchausen syndrome, where people simulate trauma or illness in order to draw attention.In conclusion, āthe medico-legal significance of self-embedding of foreign objectsā is a new concept where the forensic physician has to exclude ātortureā by a third party before ascertaining the concept of self-harm. Multiple foreign objects, found parallel to body surface, at accessible sites and accessible directions to push foreign bodies between the thumb and index finger favors self-embedding
Household water security through stored rainwater and consumer acceptability: a case study of the Anuradhapura District
Rainwater harvesting has increased in popularity in Sri Lanka over the past two decades due to the number of water supply projects funded by the government and non-governmental organizations (NGOs). The stored rainwater can provide accessible, reliable, timely and adequate supplies of water to households but there are uncertainties as to safety, in terms of water quality, and consumer acceptability. A study was, therefore, conducted in the Anuradhapura District, in the dry zone, to assess consumer acceptability of stored rainwater for household purposes and to conduct rainwater quality tests in a laboratory. The majority of households in Anuradhapura meet their drinking water requirements from protected wells (59.6 %). Prior to the project, people greatly preferred open wells as a source of domestic water, followed by tubewells, because they believed that water in open wells is of good quality and drinkable. However, stored rainwater has become the priority source now, especially through roof rainwater harvesting (RRWH), which is used during the dry periods. The study revealed that more than 85 % of households use stored rainwater for drinking although some have concerns over the quality and only drink it after boiling. The easy accessibility of water and the assurance by the project team that it is of good quality are the main reasons that people are willing to drink it. The acceptability of stored rainwater for consumption was very high in water-scarce areas and with the increasing distance to the nearest and alternative sources of good-quality water. Of those who felt that they had adequate water, 84 % of the sample households found it adequate in the wet season but only 21 % in the dry season. Water quality analysis revealed that the chemical and physical quality of stored rainwater is within the acceptable range with respect to Sri Lankan Standards, SLS: 614, for potable water quality (SLIS 1983). Other domestic water sources exceeded standards for electrical conductivity, total alkalinity, hardness, ammonium nitrogen, fluorides and total iron. However, stored rainwater was of lower biological quality than other domestic water sources.Length: pp.87-97Domestic waterWater securityWater harvestingWater qualityRural areasCase studies
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