scholarly journals Technology of enhancing image detalization with nonlinear correction of highly gradient fragments

2019 ◽  
Vol 43 (3) ◽  
pp. 484-491 ◽  
Author(s):  
V.A. Fursov ◽  
Ye.V. Goshin ◽  
K.S. Medvedeva
Keyword(s):  
Linear Filter ◽  
Image Correction ◽  
Nonlinear Correction ◽  
Absolute Value ◽  
Optical Instruments ◽  
Brightness Difference ◽  
Centrally Symmetric ◽  
Noise Amplification ◽  
Non Linear Filter

The article is devoted to the problem of improving the quality of images recorded using low-resolution optical instruments, including diffraction-based cameras. A two-stage image correction technology is proposed. At the first stage, the correction is carried out using a linear FIR filter with a centrally symmetric frequency response in the form of quadratic and exponential functions. The resulting image is then processed with a non-linear filter that performs computer retouching of image areas characterized by a noticeable brightness difference. This procedure is only performed on those pixels in which the absolute value of gradients in different directions is sufficiently high, that is, they are located on the borders of areas with different intensity levels. This allows us to avoid noise amplification in the background, which is typical of traditional filters. The examples of the implementation are provided, showing the possibility of achieving high sharpness and illustrating how the filter can be adjusted by visual perception.

scholarly journals Budget performance indicators: theoretical and practical aspects

2021 ◽  
Vol 2021 (1) ◽  
pp. 46-63
Author(s):  
Serhii YUSHKO ◽  
Keyword(s):  
Budget Deficit ◽  
The State ◽  
Planning System ◽  
Budget Management ◽  
Budget Planning ◽  
Absolute Value ◽  
Before And After ◽  
The Relationship ◽  
Budget Execution

The article examines the indicators on the basis of which the budget execution in Ukraine is assessed. Budget revenues and expenditures are characterized. The paper demonstrates the features of calculating the budget deficit (surplus) in Ukraine before and after 2004 year, emphasizing that despite the special place of this indicator in the budget planning system, for various reasons for a number of years there was neglect of current regulations legislation and world experience in budget deficit management. It is emphasized the imperfection of the budget deficit indicator due to its inherent shortcomings, concluding that the absolute value of the budget deficit is important in connection with another indicator – budget financing. The components of budget financing are named and characterized. It was found that the most important role in the context of balancing the main budget of the state belongs to debt operations. It is demonstrated the relationship between indicators of budget deficit and financing (their modular values are the same), revenues and expenditures (identical provided the balances at the beginning and end of the reporting period), net borrowing and the amount of public debt (the value of the latter increases / decreases by the amount net borrowing). The examples of specific budget years demonstrate the facts of exceeding the total amount of funding (budget deficit) by net borrowings of the state; the conclusion about the significance of the indicator of net borrowings in assessing the state of public finances is drawn; the need for further search for ways to improve the quality of budget management, thoughtful borrowing planning, the implementation of active budget operations with securities is stressed.

scholarly journals Efektifitas Pembelajaran Berbasis Inquiry Melalui Implementasi Modeling Instruction pada Materi Alat Optik

2021 ◽  
Vol 8 (4) ◽  
pp. 545
Author(s):  
Soekarman Soekarman
Keyword(s):  
Inquiry Learning ◽  
Optical Instrument ◽  
Student Responses ◽  
Student Activities ◽  
Inquiry Based Learning ◽  
Modeling Instruction ◽  
Optical Instruments ◽  
Descriptive Research ◽  
Quantitative Descriptive

This study aims to analyze inquiry-based learning through the implementation of modeling instruction on optical instrument materials. This research method used quantitative descriptive research. The subjects of this study were students of class XI IPA SMAN 2 Donggo. The collection technique includes observation, literature review, questionnaire, test and documentation. The data obtained will be analyzed descriptively quantitatively, among the research data to be analyzed are: student activities, learning outcomes, and student responses to ongoing learning. The results of this study include: 1) Student activity obtained a score of 74.58% or good category, 2) Inquiry learning with Modeling Instruction on optical instrument material can actually improve students' understanding with an N-gain score of 1.3 points or very high category. high, 3) Student responses to learning obtained a score of 84.37% or very interesting category. Based on the results of the study, it was found that through Inquiry learning with Modeling Instruction on Optical Instruments material, it can be used as an alternative to improve the quality of learning in class, especially in Physics subjects.

scholarly journals Selected Properties of the Surface Layer of C45 Steel Parts Subjected to Laser Cutting and Ball Burnishing

Materials ◽  
2020 ◽  
Vol 13 (15) ◽  
pp. 3429 ◽  
Author(s):  
Agnieszka Skoczylas ◽  
Kazimierz Zaleski
Keyword(s):  
Surface Layer ◽  
Residual Stresses ◽  
Laser Cutting ◽  
Experimental Studies ◽  
Hardened Layer ◽  
Ball Burnishing ◽  
Absolute Value ◽  
The Impact ◽  
Compressive Residual Stresses

In this article, we report the results of experimental studies on the impact of ball burnishing parameters on the roughness, microstructure and microhardness of the surface layer of laser-cut C45 steel parts. We also analysed the distribution of residual stresses generated in the surface layer of these parts. Laser-cut parts often require finishing to improve the quality of their surface. The tests performed in this study were aimed at assessing whether ball burnishing could be used as a finishing operation for parts of this type. Ball burnishing tests were performed on an FV-580a vertical machining centre using a mechanically controlled burnishing tool. The following parameters were varied during the ball burnishing tests: burnishing force Fn, path interval fw and the diameter of the burnishing ball dn. Ball burnishing of laser-cut C45 steel parts reduced the surface roughness parameters Sa and Sz by up to 60% in relation to the values obtained after laser cutting. Finish machining also led to the reorganization of the geometric structure of the surface, resulting in an increase in the absolute value of skewness Ssk. This was accompanied by an increment in microhardness (maximum microhardness increment was ΔHV = 95 HV0.05, and the thickness of the hardened layer was gh = 40 µm) and formation of compressive residual stresses in the surface layer.

206 Analysis of Frequency Characteristics of Non-linear filter ESDS

2010 ◽  
Vol 2010.49 (0) ◽  
pp. 31-32
Author(s):  
Yohei HOSHINO ◽  
Takanori EMARU ◽  
Yukinori KOBAYASHI
Keyword(s):  
Frequency Characteristics ◽  
Linear Filter ◽  
Non Linear ◽  
Non Linear Filter
Sign in / Sign up

Export Citation Format

Share Document