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2021 ◽  
Vol 6 (3) ◽  
Author(s):  
Vijeeta Patil ◽  
Shanta Kallur ◽  
Vani Hiremani

Face recognizable proof has drawn in numerous scientists because of its novel benefit, for example, non-contact measure for include obtaining. Varieties in brightening, posture and appearance are significant difficulties of face acknowledgment particularly when pictures are taken as dim scale. To mitigate these difficulties partially many exploration works have been completed by considering shading pictures and they have yielded better face acknowledgment rate. A strategy for perceiving face utilizing shading nearby surface highlights is depicted. Test results show that Face ID approaches utilizing shading neighborhood surface highlights astonishingly yield preferred acknowledgment rates over Face acknowledgment approaches utilizing just shading or surface data. Especially, contrasted and grayscale surface highlights, the proposed shading neighborhood surface highlights can give great coordinating with rates to confront pictures taken under extreme varieties in enlightenment and furthermore for low goal face pictures. The other biometric framework utilizes palmprint as quality for the recognizable proof and validation of people. The principal point is to extract Haralick highlights and utilization of probabilistic neural organizations for confirmation utilizing palmprint biometric quality. PolyUdatabase tests are taken from around 200 clients every client's 2 examples are gained. This palm print biometric recognizes the phony (fake) palmprint made of POP (Plaster of paris) and separates among living and non-living dependent on the entropy highlight. Test results portray that the eleven Haralick feature values are acquired in execution stage and productive precision is accomplished.


Author(s):  
Charles C. Verharen

AbstractThis essay contrasts Nietzsche’s remarks on elite education with W.E.B. Du Bois’ demand for democratized education. The essay takes their remarks as springboards for a twenty-first century philosophy of education rather than an historical account of their philosophies. Both thinkers cultivated Kant and Hegel’s dream that the spirit of freedom guided by reason would unite all the world’s peoples. Both held that education was key to realizing the dream. Their judgments about qualifying for education separated them. Nietzsche insisted that only the elite should receive the fullest measure of education. Du Bois believed that in the future virtually every human being would receive a university-level education. The essay’s principal point is to show how contemporary technology can make Du Bois’ dream a reality. An African philosopher’s working model demonstrates a path to universal university education.


2021 ◽  
Vol 1 (4) ◽  
Author(s):  
Guy Bélanger ◽  
Marie-Michèle Lemieux ◽  
Denis Boisvert
Keyword(s):  

Une multitude de pratiques diversifiées ont été mises en œuvre afin de favoriser le développement des compétences informationnelles (CI) chez les étudiants du réseau de l’Université du Québec. Ces pratiques n’ont jamais fait l’objet d’évaluation de leur pertinence, ni des effets engendrés. Afin de contribuer à solutionner cette problématique, une étude méthodologique en trois phases a été conduite au sein de ce réseau. La première phase a permis de valider 339 critères de qualité des pratiques de développement des compétences informationnelles (PDCI) auprès d’experts. La deuxième phase consistait à expérimenter un processus de mesure de la qualité des formations documentaires et de la collaboration interprofessionnelle. Dans la troisième phase, des cercles de qualité constitués dans six universités ont procédé à l’évaluation de leurs résultats. La mise en commun de ces évaluations a permis d’identifier les forces et les points faibles significatifs en matière de PDCI. Les forces identifiées sont la qualité de la prestation et le niveau d’expertise démontrés par les bibliothécaires ainsi que leur relation avec les professeurs. Les points faibles se réfèrent à la faible collaboration interprofession­nelle et aux stratégies pédagogiques employées dans le cadre des formations documentaires. Une observation pour le moins paradoxale se dégage des résultats. Alors que la relation entre les bibliothécaires et les professeurs constitue la troisième force en importance, la collaboration interprofessionnelle a été identifiée comme le principal point faible. Ce constat a conduit les auteurs à définir un continuum de pratiques collaboratives permettant de préciser les différents niveaux de travail collaboratif.


Micromachines ◽  
2020 ◽  
Vol 11 (10) ◽  
pp. 918
Author(s):  
Zhiyong Zhang ◽  
Xiaodong Wang ◽  
Hongtu Zhao ◽  
Tongqun Ren ◽  
Zheng Xu ◽  
...  

The machine vision measurement module is indispensable for the Modularized Flexible Precision Assembly Station (MFPAS), which is a fully automatic assembly system being developed at Dalian University of Technology (DUT). MFPAS consists of basic and additional modules, and are expected to be flexible, expandable, and re-configurable to adapt to a variety of parts with a large size range, requiring the machine vision measurement module to be able to achieve accurate measurement of position, as well as orientation of the parts with different size scale. An automatic zooming vision system was set up for evaluation and final integration in MFPAS. Pixel equivalent, principal point and orientation deviation of images were analyzed and experimentally studied using different magnifications of the lens. A new template with circular patterns of different diameters was designed for zoom-lens calibration. The experiments show that the measurement error caused by the variation of the pixel equivalent, principal point and orientation is estimated under 10 μm without online calibration. When high accuracy is required, online calibration can be employed during assembly. The evaluation results of the vision system with or without on-line calibration were given for a better trade-off between accuracy and efficiency during assembly.


Author(s):  
E. Cledat ◽  
D. A. Cucci ◽  
J. Skaloud

Abstract. Camera calibration refers to the modeling of the relationship between the coordinates of object points and their projections on the image plane. This is usually done by parametric models that describe the physical properties of the lens systems and camera assemblies, such as the camera principal distance, the principal point, and various types of optical distortions. In photogrammetry, accurate knowledge of the parameters of such models, often referred to as Interior Orientation (IO), is of ultimate importance. In this work, we target advanced corridor mapping applications with UAVs. In this scenario, the camera calibration is not completely observable due to the unfavorable geometry of the flight trajectory (e.g., no cross flight lines available and a single altitude) and needs to be determined beforehand. Further challenges are introduced by the limited mechanical stability of UAV-grade cameras. This may cause slight variations in the IO that need to be recovered while processing production flights. We review and compare two well known camera models, the Brown-Conrady and the Ebner’s self-calibration functions, in 36 calibration setups and provide a discussion of the results, where sub ground sampling distance accuracy in the checkpoints was achieved for some, but not all, configurations.


2019 ◽  
Author(s):  
Martinus E Tjahjadi ◽  
Silvester S Sai ◽  
Fourry Handoko

A fixed focal length lens (FFL) camera with on-adjustable focal length is common companions for conducting aerial photography using unmanned aerial vehicles (UAVs) due to its superiority on optical quality and wider maximum aperture, lighter weight and smaller sizes. A wide-angle 35mm FFL Sony a5100 camera had been used extensively in our recent aerial photography campaign using UAV. Since this off-the-self digital camera is categorized into a non-metric one, a stability performance issue in terms of intrinsic parameters raises a considerably attention, particularly on variations of the lens principal distance and principal point’s position relative to the camera’s CCD/CMOS sensor caused by the engine and other vibrations during flight data acquisitions. A series of calibration bundle adjustment was conducted to determine variations in the principal distances and principal point coordinates before commencing, during, and after accomplishment of the flight missions. This paper demonstrates the computation of the parameters and presents the resulting parameters for three different epochs. It reveals that there are distinct discrepancies of the principal distances and principal point coordinates prior to, during, and after the mission, that peaked around 1.2mm for the principal distance, as well as around 0.4mm and 1.3mm along the x-axis and the y-axis of the principal point coordinates respectively. In contrast, the lens distortions parameters show practically no perturbations in terms of radial, decentering, and affinity distortion terms during the experiments.


Author(s):  
D. D. Lichti ◽  
D. Jarron ◽  
M. Shahbazi ◽  
P. Helmholz ◽  
R. Radovanovic

Abstract. Chromatic aberration in colour digital camera imagery can affect the accuracy of photogrammetric reconstruction. Both longitudinal and transverse chromatic aberrations can be effectively modelled by making separate measurements in each of the blue, green and red colour bands and performing a specialized self-calibrating bundle adjustment. This paper presents the results of an investigation with two aims. The first aim is to quantify the presence of chromatic aberration in two sets of cameras: the six individual cameras comprising a Ladybug5 system, calibrated simultaneously in air; and four GoPro Hero 5 cameras calibrated independently under water. The second aim is to investigate the impacts of imposing different constraints in the self-calibration adjustment. To this end, four different adjustment cases were performed for all ten cameras: independent adjustment of the observations from each colour band; combined adjustment of all colour bands’ observations with common object points; combined adjustment of all colour bands with common object points and common exterior orientation parameters for each colour band triplet; and combined adjustment with common object points and certain common interior orientation parameters. The results show that the Ladybug5 cameras exhibit a small (1-2 pixel) amount of transverse chromatic aberration but no longitudinal chromatic aberration. The GoPro Hero 5 cameras exhibit significant (25 pixel) transverse chromatic aberration as well as longitudinal chromatic aberration. The principal distance was essentially independent of the adjustment case for the Ladybug5, but it was not for the GoPro Hero 5. The principal point position and precision were both affected considerably by adjustment case. Radial lens distortion was invariant to the adjustment case. The impact of adjustment case on decentring distortion was minimal in both cases.


Author(s):  
Miftahus Surur ◽  
Asmuki Asmuki

Da’wa is a holy duty of the apostles who revealed to them by God. Afterwards, it is bequeathed to Moslem scholars that have capability and integrity. In this era many Da’was just contain humiliation and hate speech that destroy the unity and peace among the people. It shows that Da’wa has strayed far from its real meaning and purpose. Basically Da’wa aims to unite mankind unto One God, one tenet and universal values according on surah Ali Imran verse 64. Based on this reality, the author – by researching the word Da’wa in the Qur’an on semantic perspective – aims to return Da’wa back to its real meaning and main purpose. Semantic is the linguistic and philosophical study of meaning in language. “Semantic of The Qur’an” should be understood only in the sense of the Qur’ans weltanschauung or world view. To understand the meaning of the word Da’wa, the author – firstly – found the basic meaning and relational meaning, then the synchronic and the diachronic. The result is that Da’wa Islam invites people unto the one tenet that held by all the prophets and the earlier people. It is no worship except One God that called tauhid or monotheism. It is the principal point to get Da’wa back to advance that the main purpose of Da’wa is peace and the unity under tauhid tenet and universal values based on surah Ali Imran verse 64.


2019 ◽  
Vol 58 (09) ◽  
pp. 1 ◽  
Author(s):  
Xinghua Chai ◽  
Feng Gao ◽  
Yan Hu

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