Publish in OALib Journal
APC: Only $99
Image denoising has remained a fundamental problem in the field of image processing. With Wavelet transforms, various algorithms for denoising in wavelet domain were introduced. Wavelets gave a superior performance in image denoising due to its properties such as multi-resolution. The problem of estimating an image that is corrupted by Additive White Gaussian Noise has been of interest for practical and theoretical reasons. Non-linear methods especially those based on wavelets have become popular due to its advantages over linear methods. Here I applied non-linear thresholding techniques in wavelet domain such as hard and soft thresholding, wavelet shrinkages such as Visu-shrink (non-adaptive) and SURE, Bayes and Normal Shrink (adaptive), using Discrete Stationary Wavelet Transform (DSWT) for different wavelets, at different levels, to denoise an image and determine the best one out of them. Performance of denoising algorithm is measured using quantitative performance measures such as Signal-to-Noise Ratio (SNR) and Mean Square Error (MSE) for various thresholding techniques.
This work aims at exploring the
effects of the interconnection between isolated electric power systems upon
some important aspects
such as enhancing
reliability levels along with reducing installation and operation costs. To discern the advantages
associated with this study, the developed methodology has been applied to three
existing power systems in the northern region of the Kingdom of Saudi Arabia
presently within the concession domain of the Saudi Electric Company (SEC).
These systems have been established to meet the present loads and to withstand future electrical demands for a period of time before
additional generation and transmission reinforcements are needed. In this work,
have been utilized to determine
the period that these systems can fulfill the present and future loads without
affecting the reliability levels and the threshold that an additional capacity
should be added to maintain those required reliability levels. In application
to the reliability criteria, technical, operational and economic advantages can
be realized, i.e., higher reliability levels and lower
installation and operation costs after the proposed interconnection between these
selected isolated power systems take place.
study was conducted to examine the nutritional content, contamination levels,
and biological effects of 3 local prepared formulas. Formula (1) contained
mixed nuts; formula (2) contained moghat, honey and royal jelly, while formula (3)
contained honey, fenugreek and royal jelly. Groups of albino rats (90 rats)
were randomly allocated to diets of control group or 1 - 3 treatment groups.
The tested diets contained 15% carbohydrate. The weight and food intake were
recorded. Blood tests were conducted to determine total cholesterol,
low-density lipoprotein cholesterol, high-density lipoprotein cholesterol,
triglycerides, glucose, urea, creatinine, white blood cell count (WBC), red
blood cell count (RBC), haemoglobin (HB), mean corpuscular volume (MCV), and haematocrit
(HCT). Results showed that bacterial contamination was found in formula (1) and
formula (3). Fungal contamination was detected in formula (2) and formula (3).
Body weight increased significantly in the rats fed treatment formulas compared
to the control group. The blood tests indicated significant increases in the
levels of glucose, WBC, HCT, total cholesterol, LDL cholesterol, and triglycerides
as well as a significant decrease in HDL level in the group (2) was fed formula
(1) the control. In conclusion, these findings indicate that these local
formulas may not be safe, and further studies are required to understand the
consequences of a long-term consumption of these formulas.