scholarly journals Application of the pseudoinverse computation in reconstruction of blurred images

Filomat ◽  
2012 ◽  
Vol 26 (3) ◽  
pp. 453-465 ◽  
Author(s):  
Sladjana Miljkovic ◽  
Marko Miladinovic ◽  
Predrag Stanimirovic ◽  
Igor Stojanovic
Keyword(s):  
Mathematical Model ◽  
Direct Method ◽  
Motion Blur ◽  
Linear Motion ◽  
Numerical Examples ◽  
High Level ◽  
Blurred Images ◽  
Programming Package ◽  
A Direct Method ◽  
Very High

We present a direct method for removing uniform linear motion blur from images. The method is based on a straightforward construction of the Moore-Penrose inverse of the blurring matrix for a given mathematical model. The computational load of the method is decreased significantly with respect to other competitive methods, while the resolution of the restored images remains at a very high level. The method is implemented in the programming package MATLand respective numerical examples are presented.

A Research on the Optimization of Fuzzy Image

2013 ◽  
Vol 409-410 ◽  
pp. 1593-1596
Author(s):  
Xue Feng Wu ◽  
Yu Fan
Keyword(s):  
Mathematical Model ◽  
Image Restoration ◽  
Point Spread Function ◽  
Motion Blur ◽  
Inverse Filtering ◽  
Point Spread ◽  
Spread Function ◽  
Blurred Image ◽  
Blurred Images ◽  
Fuzzy Image

The restore algorithm of the image blurred by motion is proposed, and a mathematical model based on motion blur system is eomtrueted£®The Point spread function of the motion blur is given According to the characteristics of blurred images the parameters of point spread function are estimated ,and three methods are introduced for image restoration. The three methods are inverse filtering of image restoration, Lucy-Richardson image restoration and Wiener image restoration. The principles of the three image restoration methods are analyzed. The motion blurred image restoration experiment is made. The results show that the visibility of the image is improved, and the image restoration is more stable.

A Study of the Influence of Initial Shape Imperfections on the Stability of Lattice Shells by Direct and Shell Analogy Methods

1987 ◽  
Vol 2 (4) ◽  
pp. 223-230 ◽  
Author(s):  
Jozef Sumec ◽  
Antonino E. Zingali
Keyword(s):  
Mathematical Model ◽  
Direct Method ◽  
Initial Shape ◽  
Analogy Method ◽  
General Stability ◽  
Reduction Coefficient ◽  
The Stability ◽  
Comparison Of The Results ◽  
A Direct Method ◽  
Lattice Shells

This paper describes the influence of initial shape imperfections of lattice shells on their general stability. An adequate mathematical model for the analysis of the shell instability by using a direct method (FEM) and a shell analogy method is presented. The reduction coefficient k for calculation of the critical load is derived. An illustrative example is used for comparison of the results calculated by the two numerical methods.

scholarly journals A Simple Direct Method to Obtain Kinetic Parameters for Polymer Thermal Decomposition

2021 ◽  
Vol 11 (23) ◽  
pp. 11300
Author(s):  
David Lázaro ◽  
Alain Alonso ◽  
Mariano Lázaro ◽  
Daniel Alvear
Keyword(s):  
Thermal Decomposition ◽  
Kinetic Parameters ◽  
Direct Method ◽  
Reaction Model ◽  
Exponential Factor ◽  
Gaseous Fuels ◽  
High Level ◽  
A Direct Method ◽  
Polymer Combustion ◽  
Model Expression

In a fire, the polymer combustion occurs when gaseous fuels react with oxygen. The heating of a material could force the release of gaseous fuels during thermal decomposition and pyrolysis. The rate of pyrolysis to define the gaseous fuels is usually interpreted by means of the Arrhenius expression and a reaction model expression, which are characterized by an activation energy, a pre-exponential factor, and a reaction order value. Many methods are available for determining kinetic parameters from thermogravimetric experimental data. However, the most challenging issue is achieving an adequate balance between accuracy and simplicity. This work proposes a direct method for determining the kinetic parameters with only a thermogravimetric experiment at a single heating rate. The method was validated with six polymers, and the results were compared with those from similar procedures, such as the Lyon method and generalized direct method. The results achieved using the simpler approach of the proposed method show a high level of accuracy.

Study on Motion Blur Image Restoration Algorithms

2013 ◽  
Vol 753-755 ◽  
pp. 2976-2979
Author(s):  
Yu Fan ◽  
Xue Feng Wu
Keyword(s):  
Mathematical Model ◽  
Image Restoration ◽  
Point Spread Function ◽  
Motion Blur ◽  
Inverse Filtering ◽  
Point Spread ◽  
Spread Function ◽  
Blurred Image ◽  
Restoration Algorithms ◽  
Blurred Images

The restore algorithm of the image blurred by motion is proposed, and a mathematical model based on motion blur system is eomtrueted£®The Point spread function of the motion blur is given£®According to the characteristics of blurred images£¬the parameters of point spread function are estimated ,and three methods are introduced for image restoration. The three methods are inverse filtering of image restoration,Lucy-Richardson image restoration and Wiener image restoration.The principles of the three image restoration methods are analyzed. The motion blurred image restoration experiment is made. The results show that the visibility of the image is improved ,and the image restoration is more stable.

scholarly journals Quantification and Evaluation of Soil Erosion in the Estuaries of Cameroon, Gulf of Guinea: Case of Nylon Area

2018 ◽  
Vol 2018 ◽  
pp. 1-12
Author(s):  
Eric Flavien Mbiakouo-Djomo ◽  
Ebénézer Njeugna ◽  
Denis Tcheukam-Toko ◽  
Didier Fokwa
Keyword(s):  
Soil Erosion ◽  
Catchment Area ◽  
Direct Method ◽  
Water Erosion ◽  
Gulf Of Guinea ◽  
Bare Ground ◽  
Average Potential ◽  
High Level ◽  
A Direct Method ◽  
Soil Losses

The area of Nylon represents a sensible and vulnerable environment where water erosion is the cause of many soil losses contributing to the production and movement of sediments from the upstream to the lowest depths. The high level of rainfall in this town, soil texture (sand-clay-silt), and the anarchic occupation of the area play a part in the important deterioration of the bare ground on the upstream of the catchment area. This causes with time an instability of structures and living places which can lead to their progressive disappearance. In order to assess the quantities of displaced sediments, the studies on the quantification of soil moved annually by water erosion are carried out. A direct method is used consisting in using a minisimulator of rain (NEME) in order to understand the phenomena involved and assess the quantity of sediments which can be moved. It helps in assessing erosion caused by the rain and extrapolating results over the catchment area of the chosen field of study. USLE relation has permit to make an extrapolation of the quantity of soil affected, and the result shows that the average potential of loss of soil is 153.57 t/ha/annum.

التغير المناخي واثره في المقنن المائي لمحصول العنب في محافظة ديالى

2019 ◽  
Vol 1 (34) ◽  
pp. 391-422
Author(s):  
اشواق حسن حميد صالح
Keyword(s):  
Climate Change ◽  
Statistical Analysis ◽  
Wind Speed ◽  
Extreme Temperature ◽  
Solar Brightness ◽  
The Subject ◽  
Climate Station ◽  
The Times ◽  
High Level ◽  
Very High

Climate change and its impact on water resources is the problem of the times. Therefore, this study is concerned with the subject of climate change and its impact on the water ration of the grape harvest in Diyala Governorate. The study was based on the data of the Khanaqin climate station for the period 1973-2017, (1986-2017) due to lack of data at governorate level. The general trend of the elements of the climate and its effect on the water formula was extracted. The equation of change was extracted for the duration of the study. The statistical analysis was also used between the elements of the climate (actual brightness, normal temperature, micro and maximum degrees Celsius, wind speed m / s, relative humidity% The results of the statistical analysis confirm that the water ration for the study area is based mainly on the X7 evaporation / netting variable, which is affected by a set of independent variables X1 Solar Brightness X4 X5 Extreme Temperature Wind Speed ​​3X Minimal Temperature and Very High Level .

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