scholarly journals A Procedure for the Correction of Back-to-Front Degradations in Archival Manuscripts with Preservation of the Original Appearance

2021 ◽  
pp. 1-16
Author(s):  
Pasquale Savino ◽  
Anna Tonazzini
Keyword(s):  
Image Inpainting ◽  
Selective Removal ◽  
Automatic Analysis ◽  
Experimental Results ◽  
Distinctive Features ◽  
Non Invasive ◽  
Second Stage ◽  
Historical Manuscripts ◽  
Traditional Work ◽  
Fast Procedure

Virtual restoration of digital copies of the human documental heritage is crucial for facilitating both the traditional work of philologists and paleographers and the automatic analysis of the contents. Here we propose a practical and fast procedure for the correction of the typically complex background of recto–verso historical manuscripts. The procedure has two main, distinctive features: it does not need for a preliminary registration of the two page sides, and it is non-invasive, as it does not alter the original appearance of the manuscript. This makes it suitable for the routinary use in the archives, and permits an easier fruition of the manuscripts, without any information being lost. In the first stage, the detection of both the primary text and the spurious strokes is performed via soft segmentation, based on the statistical decorrelation of the two recto and verso images. In the second stage, the noisy pattern is substituted with pixels that simulate the texture of the clean surrounding background, through an efficient technique of image inpainting. As shown in the experimental results, evaluated both qualitatively and quantitatively, the proposed procedure is able to perform a fine and selective removal of the degradation, while preserving other informative marks of the manuscript history.

Automated Categorisation of Nailfold Capillaroscopy Images

2016 ◽  
pp. 134-145
Author(s):  
Niraj Doshi ◽  
Gerald Schaefer
Keyword(s):  
Early Detection ◽  
Texture Analysis ◽  
Ground Truth ◽  
Experimental Results ◽  
Nailfold Capillaroscopy ◽  
Image Region ◽  
Blood Capillaries ◽  
Non Invasive ◽  
Spectrum Disorders ◽  
Voting Strategy

Nailfold capillaroscopy (NC) is a non-invasive imaging technique employed to assess the condition of blood capillaries in the nailfold. It is particularly useful for early detection of scleroderma spectrum disorders and evaluation of Raynaud's phenomenon. While automated approaches to analysing NC images are relatively rare, they are typically based on extraction and analysis of individual capillaries from the images in order to assign a patient to one of the commonly employed scleroderma patterns. In this chapter, we present a different approach that does not rely on individual capillaries but performs interpretation in a holistic way based on information gathered from an image or a selected image region. In particular, our algorithm employs texture analysis to characterise the underlying patterns, coupled with a classification stage to first identify patterns in fingers, and then, through a voting strategy, reach a decision for a patient. Experimental results on a set of NC images with known ground truth demonstrate the efficacy of the proposed approach.

Removing Blinks in Video-Oculography

2012 ◽  
Vol 239-240 ◽  
pp. 1165-1168
Author(s):  
Xue Jun Chen ◽  
Chen Hua Zhang
Keyword(s):  
Kalman Filter ◽  
Eye Movement ◽  
Detection Method ◽  
Threshold Level ◽  
Experimental Results ◽  
Video Oculography ◽  
Non Invasive ◽  
Pupil Center ◽  
Simulation And Experiment ◽  
Blink Artifact

Video-oculography (VOG) is a non-invasive detection method used for eye movement. However, during testing, if object blinks, VOG would be difficult to acquire eye movement. A removing blink method based on Kalman Filter was presented. A cubic spline was employed to patch the removed data. Then simulation and experiment were done. The experimental results show that the method well predicts the next state. Compared to a threshold level, it eliminates blink artifact and patches the removed data. The method is a viable means of predicting pupil center for blink in VOG.

Rapid and non-invasive surface crack detection for pressed-panel products based on online image processing

2019 ◽  
Vol 18 (5-6) ◽  
pp. 1928-1942 ◽  
Author(s):  
Hwee Kwon Jung ◽  
Gyuhae Park
Keyword(s):  
Image Processing ◽  
Manufacturing Process ◽  
Crack Detection ◽  
Experimental Results ◽  
Inspection System ◽  
Camera System ◽  
Non Invasive ◽  
Panel Products ◽  
Traditional Approaches ◽  
Detection And Localization

Crack detection during the manufacturing process of pressed-panel products is an important aspect of quality management. Traditional approaches for crack detection of those products are subjective and expensive because they are usually performed by experienced human inspectors. Therefore, the development and implementation of an automated and accurate inspection system is required for the manufacturing process. In this article, a crack detection technique based on image processing is proposed that utilizes the images of panel products captured by a regular camera system. First, the binary panel object image is extracted from various backgrounds after considering the color factor. Edge lines are then generated from a binary image using a percolation process. Finally, crack detection and localization is performed with a unique edge-line evaluation. In order to demonstrate the capability of the proposed technique, lab-scale experiments were carried out with a thin aluminum plate. In addition, a test was performed with the panel images acquired at an actual press line. Experimental results show that the proposed technique could effectively detect panel cracks at an improved rate and speed. The experimental results also demonstrate that the proposed technique could be an extension of structural health monitoring frameworks into a new manufacturing application.

ROBUST EYE TRACKING IN VIDEO SEQUENCE

2012 ◽  
Vol 21 (01) ◽  
pp. 1250012 ◽  
Author(s):  
HUCHUAN LU ◽  
SHIPENG LU ◽  
GANG YANG
Keyword(s):  
Eye Tracking ◽  
Visual Tracking ◽  
Video Sequence ◽  
Experimental Results ◽  
Video Sequences ◽  
Affine Manifold ◽  
Second Stage ◽  
Novel Method ◽  
Iris Center ◽  
Image Streams

In this paper, we present a novel method for eye tracking, in detail describing the eye contour and the visible iris center. Combining the IVT (Incremental Visual Tracking) tracker, the proposed online affine manifold model, in which the sequentially learning shape and texture are modeled in the first stage and noniterative recovering estimation in the second stage, tracks the eye contour in video sequences. After that, an adaptive black round mask is generated to match the visible iris center. Experimental results of eye tracking indicate that our tracker works well in the PC or domestic camera captured image streams with considerable head and eyeball rotation.

An Outlier Detection Method Based on Fuzzy C-Means Clustering

2009 ◽  
Vol 419-420 ◽  
pp. 165-168
Author(s):  
Qiang Li ◽  
Jian Pei Zhang ◽  
Guang Sheng Feng
Keyword(s):  
Data Mining ◽  
Outlier Detection ◽  
Detection Method ◽  
Experimental Results ◽  
Data Mining Techniques ◽  
Fuzzy C Means ◽  
Second Stage ◽  
Fuzzy C Means Clustering ◽  
Fcm Clustering ◽  
Two Stages

Both fuzzy c-means (FCM) clustering and outlier detection are useful data mining techniques in real applications. In this paper, we show that the task of outlier detection could be achieved as by-product of fuzzy c-means clustering. The proposed strategy consists of two stages. The first stage consists of purely fuzzy c-means process, while the second stage identifies exceptional objects according to a novel metric based on the entropy of membership values. We provide experimental results to demonstrate the effectiveness of our technique.

In What Sense is “the Prisoner’s Dilemma Game” a Dilemma for a Human or a Programmed Agent?

2007 ◽  
Vol 11 (7) ◽  
pp. 833-841
Author(s):  
Shihomi Wada ◽  
◽  
Keiji Suzuki
Keyword(s):  
Prisoner's Dilemma ◽  
Prisoner’S Dilemma ◽  
Experimental Results ◽  
Double Bind ◽  
Prisoner’S Dilemma Game ◽  
Equal Distribution ◽  
Second Stage ◽  
Human Agent ◽  
Prisoner's Dilemma Game ◽  
Similarities And Differences

In this paper, we compare the experimental results of human agents with that of programmed agents using the double-bind prisoner’s dilemma game, in which an ordinary prisoner’s dilemma game is nested into another dilemma; that is, a player has to decide firstly if s/he will play prisoner’s dilemma or not. Comparing human-agent experimental results with programmed agent experimental results, we found remarkable similarities and differences as follows: (1) when cooperation is chosen in the second stage, both human and programmed agents show similar distributions of the first choices, (2) in the case when agents choose defection in the second stage, human agents have a tendency to play an ordinary prisoner’s dilemma game, (3) in the case when agents choose defection in the second stage, programmed agents show almost equal distribution. These results suggest that programmed agents may be cooperators and get close to the Pareto optimal equilibrium in an appropriate setting.

Experimental Results of Hot Section Metal Temperature Measurements of Rolls-Royce Allison 501KH Under Massive Steam Injection

2002 ◽  
Author(s):  
Dah Yu Cheng ◽  
Albert L. C. Nelson
Keyword(s):  
Gas Turbine ◽  
Gas Turbines ◽  
Steam Injection ◽  
Gas Turbine Engine ◽  
Injection Rate ◽  
Experimental Results ◽  
Turbine Engine ◽  
Second Stage ◽  
Before And After ◽  
Internally Cooled

It has always been thought by the gas turbine industry that steam injection will shorten the effective life of certain gas turbine parts. Recently it was shown that a number of steam injected Cheng Cycle Rolls-Royce Allison 501KH gas turbines, accumulated more than 2.5 million logged hours of operation and with a prolonged parts life. The “hot parts” of a Rolls-Royce Allison 501KH gas turbine engine that are of concern, are the first stage nozzle, the first stage blade, and the second stage nozzle. These parts are all air cooled through the first stages internal passages. (The second stage blades and on down are not internally cooled.) The concern raised in many gas turbine institutions is that the metal temperatures of these hot parts, due to the heat conductivity properties of injected steam, will make them deteriorate faster. An experiment was completed using a steam injected Cheng Cycle, on an Allison 501KH gas turbine engine. In the experiment, a substantial number of thermocouples were attached to the surfaces of the turbines hot parts. This engine had a steam injection rate of up to 18% airflow. The experimental results showed that if steam could be properly mixed with the cooling air before the air enters into the cooling passages of the hot parts, the metal temperatures did not increase. During the operation of the engines, it was recorded that the hot parts lifetime increased from 25,000 hours before the hot parts section had to be overhauled, to 42,000 hours (on average) before they needed to be overhauled. This paper will report the measurement installation in detail. The results before and after steam injection in the hot parts sections of the Rolls-Royce Allison 501KH engine will also be discussed.

scholarly journals An Adaptive Image Inpainting Method Based on Continued Fractions Interpolation

2018 ◽  
Vol 2018 ◽  
pp. 1-16 ◽  
Author(s):  
Lei He ◽  
Yan Xing ◽  
Kangxiong Xia ◽  
Jieqing Tan
Keyword(s):  
Continued Fractions ◽  
State Of The Art ◽  
Signal To Noise Ratio ◽  
Subjective Evaluation ◽  
Image Inpainting ◽  
Rational Interpolation ◽  
Objective Evaluation ◽  
Experimental Results ◽  
Signal To Noise

In view of the drawback of most image inpainting algorithms by which texture was not prominent, an adaptive inpainting algorithm based on continued fractions was proposed in this paper. In order to restore every damaged point, the information of known pixel points around the damaged point was used to interpolate the intensity of the damaged point. The proposed method included two steps; firstly, Thiele’s rational interpolation combined with the mask image was used to interpolate adaptively the intensities of damaged points to get an initial repaired image, and then Newton-Thiele’s rational interpolation was used to refine the initial repaired image to get a final result. In order to show the superiority of the proposed algorithm, plenty of experiments were tested on damaged images. Subjective evaluation and objective evaluation were used to evaluate the quality of repaired images, and the objective evaluation was comparison of Peak Signal to Noise Ratios (PSNRs). The experimental results showed that the proposed algorithm had better visual effect and higher Peak Signal to Noise Ratio compared with the state-of-the-art methods.

scholarly journals EXPERIMENTAL VERIFICATION OF THE EFFECTIVENESS OF LEARNING ALGORITHMIZATION AND PROGRAMMING IN SECONDARY SCHOOL BASED ON NATIONAL SPECIFICATIONS

2020 ◽  
Vol 71 (3) ◽  
pp. 248-254
Author(s):  
N.Т. Oshanova ◽  
◽  
G.D. Аnuarbekova ◽  
Keyword(s):  
Secondary School ◽  
Experimental Work ◽  
Experimental Verification ◽  
Experimental Results ◽  
Second Stage ◽  
The Third ◽  
School Based ◽  
National Characteristics ◽  
Third Stage ◽  
Three Stages

This article discusses a pedagogical experiment in teaching algorithmization and programming at school by solving systems of problems based on national characteristics. The pedagogical experiment is conducted in accordance with three stages. At the first ascertaining stage, an analysis of the needs and achievements of learning algorithmization and programming by solving a system of problems based on national characteristics is made. At the second stage of formation, the work on the implementation of the developed methodology for teaching algorithmization and programming by solving a system of problems based on national characteristics is clarified. At the third stage of control, experimental results of the methodology for teaching algorithmization and programming are generalized and processed by solving a system of problems based on national characteristics. Control tasks for the subsection "algorithmization and programming" for students of grade 7 and grade 8 are given. As a result of experimental work, the effectiveness of the developed methodology for teaching programming and algorithmization in school is checked by solving systems of problems based on national characteristics.

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