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Chromatic aberration is an error that occurs in color images due to the fact that camera lenses refract the light of different wavelengths in different angles. The common approach today to correct the error is to use a lookup table for each camera-lens combination, e.g., as in Adobe PhotoShop Lightroom or DxO Optics Pro. In this paper, we propose a method that corrects the chromatic aberration error without any priot knowledge of the camera-lens combination, and does the correction already on the bayer data, i.e., before the Raw image data is interpolated to an RGB image. We evaluate our method in comparison to DxO Optics Pro, a state-of-the-art tool based on lookup tables, using 25 test images and the variance of the color differences (VCD) metric. The results show that our blind method has a similar error correction performance as DxO Optics Pro, but without prior knowledge of the camera-lens setup. CCBYNCND, open access

The purpose of this study was to highlight the problem of low groundwater levels and water shortage by analyzing how Sweden's management and adaptability capabilities work in comparison with risk management strategies. The collected result was analyzed against the so-called 4-E Strategies (Enforcement, Engineering, Education, and Economic) as the main framework. In addition, the study aimed at investigating how the ability can be created through these strategies and which of these the municipalities consider to be most effective. The data collection took place through individual semi-structured interviews with representatives from 5 municipalities. The answers from the interviews were then analyzed with qualitative content analysis, where responses generated from the qualitative content analysis were set against the 4-E strategies. The result shows that the interviewees believe that all prevention strategies may be useful depending on the context and when it is used. In addition, they must also be adapted to the local conditions in the current geographic area. The result also shows that all 4-E strategies are needed to create efficient handling and adaptability for drinking water management. The study's results show that the Swedish municipalities' management and adaptability to these strategies is satisfactory. Keywords Risk management, 4-E strategies, 3-E strategies, Drinking water management, Sweden

This paper introduces a new metric for approximating structural instability in Bayer image data. We show that the metric can be used to identify and classify validity of color correlation in local image regions. The metric is used to improve interpolation performance of an existing state of-the-art single pass linear demosaicing algorithm, with virtually no impact on computational GPGPU complexity and performance. Using four different image sets, the modification is shown to outperform the original method in terms of visual quality, by having an average increase in PSNR of 0.7 dB in the red, 1.5 dB in the green and 0.6 dB in the blue channel respectively. Because of fewer high-frequency artifacts, the average output data size also decreases by 2.5%. © 2016 IEEE.