Size Constancy in Structure from Motion

Perception ◽  
1995 ◽  
Vol 24 (10) ◽  
pp. 1155-1164 ◽  
Author(s):  
Jessica Turner ◽  
Myron L Braunstein

The relative motions of points in a structure-from-motion display involving parallel projection provide depth information in an object-centered framework: differences in velocity do not reflect differences in distance from an eyepoint. In contrast, size constancy is generally regarded to be a perspective effect, based on the relationship between projected size and distance from an eyepoint. Five subjects judged the relative sizes of objects in structure-from-motion scenes. Although the scenes were displayed without perspective, judged size was related to the simulated separation in depth of the objects. These results suggest that relative depths recovered from object-centered information are incorporated into a viewer-centered framework.

2013 ◽  
Vol 659 ◽  
pp. 156-161
Author(s):  
Sheng Nan Zhang ◽  
Bo Shi Wang ◽  
Wei Qi Yuan

Planar target is a location reference that is widely used in vision detection system. Based on monocular vision and circular markers on the planar target, a new method of determining the pose of target spatial plane is proposed. Since CCD image of a circle is an ellipse ,determining the pose of spatial plane may be transformed into determining the pose of ellipse. Ellipse curve equation of circle’s image is deduced and the independent parameters of ellipse are obtained, the relationship between spatial plane and ellipse parameters is established, thus the pose of spatial plane can be determined. By calculating the relative displacement with the standard plane that its depth information is known, the depth information from the center of ellipse image to the camera coordinate system is obtained. The algorithm is simple and fast, and it can be widely used in monocular vision detection.


2016 ◽  
Vol 9 (8) ◽  
pp. 134 ◽  
Author(s):  
Kamal J. I. Badrasawi ◽  
Ainol Zubairi ◽  
Faizah Idrus

<p class="apa">Writing skill is seen as a cornerstone of university students’ success in both academic and career life. This qualitative study was conducted to further explore the teachers’ and students’ perceptions on the relationship between writing apprehension and writing performance, contributing factors of writing apprehension, and strategies to reduce writing apprehension. Semi-structured interviews were conducted to get more in-depth information from two respondents: one experienced instructor of teaching writing at the Centre for Languages and Pre-University Academic Development (CELPAD), International Islamic University Malaysia, and another, a graduate student who was reported to having a high level of writing apprehension using Daly and Miller’s (1975) questionnaire on writing apprehension. Thematic analysis approach was used for data analysis. Both respondents were convinced that writing apprehension has a negative influence on students’ writing performance; the sources of contributing factors could be students, instructors, and teaching learning setting; and writing apprehension could be reduced through suggested strategies. It is recommended that instructors should be more aware of students’ problems in the writing skill.</p>


Author(s):  
Brian E. Kufner ◽  
Laura E. Plybon

Employers’ increased acceptance and use of mobile technology has provided employees with the ability to be in constant contact with their employer and clients through multiple communication platforms. While mobile technology has increased employee productivity, research is beginning to show an association between an upward trend of mobile technology use to an increase of fatal and nonfatal accidents. The purpose of this study was to determine if organizational safety climate influences the relationship between text message use and work-related accidents. A significant relationship was found between text message use and work-related accidents. However, there was no statistically significant main effect of organizational safety climate on work-related accidents, or interaction effect of text message use and organizational safety climate on work-related accidents. Additional research is recommended to investigate the relationships between the variables – both quantitative with larger and more diverse samples and qualitative for more in depth information about the phenomenon.


2017 ◽  
Author(s):  
◽  
Yang Cheng

[ACCESS RESTRICTED TO THE UNIVERSITY OF MISSOURI AT AUTHOR'S REQUEST.] Organization-public relationship, as a key concept of public relations, has been extensively examined by global scholars. In 1984, Ferguson first pointed out this term by stating that "the unit of study should not be the organization, nor the public, nor the communication process. Rather, the unit of study should be the relationships between organizations and their publics." (abstract). In turns, Ledingham and Bruning (1998, 2000) provided a tentative definition of OPR and developed the relationship management theory as the conceptualization, which assumed that the aim of building a positive organization-public relationship (OPR) was to build mutual benefits. While in reality, the measurement of OPR could be complex: not only cooperation, competitions or conflicts co-existed between two parties, and dyadic or multiple parties at one time should be considered, but also proscriptions such as legal and moral factors constituted as contingencies of OPRs. Much of the existing studies analyzed OPR without monitoring it longitudinally or presenting the variation of relationship dynamically. Introduced in 1997, the contingency theory of conflict management, as another important approach in the field of public relations held a realistic view to track the dynamic stances and focused on dimensions that affected these stances on communication tactics. This theory was widely applied in interdisciplinary areas such as health and crisis communication for organizational strategic thinking, but was never applied to test the relationship between organizations and their publics. However, knowing what matters enables the organization to understand what cause the changes of relationships. The relationship management theory and contingency theory of conflict management can be integrated closely. Few studies, if any, have attempted to analyze OPR by bridging the gap between the above mentioned theories. This research is arguably the first attempt integrating contingency theory and relationship management theory and expanding knowledge on how each affects the other. Two dominant approaches in the field of public relations, bolstered by a tapestry of literature from cross-disciplinary fields, are brought together to conceptualize a model of Contingent Organization-Public Relationship (COPR). To generate the theoretical robustness of COPR and test its practical applicability, a social mediated crisis occurring in contemporary China was theoretically sampled and data were collected through mixed methods research including both content analyses and in-depth interviews. Quantitatively, content analyses of 338 RCSC's press releases and 4,003 media coverage and 136,754 public posts during the time range between June, 2011 and August, 2014 provided a natural history of the application of contingent organization-public relationship (COPR) in a social mediated crisis context. Qualitative interviews also offered rich and in-depth information on the perception of stances and relationships from each party in the relationship. Findings concluded that COPR addressed the dynamic and contingent multi-party relationships. The relationship between the RCSC and online publics moved from the highly conflictual side to the neutral side, and changed back to the original competitive types of relationships (i.e., competing and evading relationships). A similar trend of the change of relationship was also found between the RCSC and media. Cooperating relationship was seldom found during the three stages of the crisis, which supported the argument that both parties in crises maintain conflictual relationships for self-interests and may adopt strategies to achieve mutual benefits. Evidence also showed that several unique contingent variables in the Chinese context such as the powerful public-led agenda, heavily censored media landscape, and distrust towards the society as a whole played significant roles in determining an organization's stance and strategies employed. Overall, this study concluded by arguing that the contingent OPR (COPR) could exist and helped to explain the dynamic process between at least two parties who are in the state of cooperation, competition, or conflict, and consider to maximize their own interests beforehand. By synthesizing both approaches of relationship management theory and contingency theory of accommodation, the concept of COPR was forged to describe the information flow between an organization and one or more publics who are in the status ranging from mutually beneficial to highly conflictual. COPR accounts for this range and for the dynamism of ongoing relationship.


Author(s):  
Valentina Nikolova-Alexieva

The highly competitive environment for the food industry after the accession of Bulgaria to the European Union puts companies under conditions where the focus is on the quality and products safety. Both the competitiveness theory and the topic of food safety have been widely discussed in recent years, and research in this area is growing, but there is a lack of in-depth information in the Bulgarian literature on the relationship between competitiveness ↔ food safety systems and the open question of how strategies food safety would increase corporate competitiveness. Examining this relationship, it is possible to uncover those factors stemming from the requirements of food safety systems, the improvement of which can help the food industry companies to increase their competitiveness. The subject of the study is the different approaches and methods of assessment and analysis outlining the opportunities for increasing the competitiveness of enterprises from the food industry through the implementation of food safety systems. The report aims to reveal the interrelationship between competitiveness and food safety systems and the implementation of methodologies to increase their competitiveness. The study and assessment of factors to improve the competitiveness of food business enterprises through the implementation of food safety systems is based primarily on expert judgment as well as on marketing and diagnostic analysis. Emphasis is placed on factors that arise from the requirements of food safety systems and a few extras that are important for the formation of strong competitive advantages.


Author(s):  
James W. Meehan ◽  
Thomas J. Triggs

The size-distance invariance hypothesis suggests that the perceived size and the perceived distance of objects in a field viewed naturally are closely related. However, this relationship breaks down when scenes are viewed through high-power optical systems. When natural scenes are viewed through an imaging display of unity magnification, there is a reduction in their apparent size. This raises the question of whether the relationship breaks down when scenes are viewed through a low-power imaging display. A single-lens reflex camera was used as an imaging display that enabled subjects to vary the size of imaged real-world scenes. Judgments of size were found to vary with depth information in scenes and between monocular and binocular viewing, consistent with a previous finding, but judgments of distance did not vary significantly across either of these conditions. The results suggest that judgments of size and judgments of distance with imaging displays are not influenced uniformly by environmental and task variables.


2010 ◽  
Vol 18 (02) ◽  
pp. 107-137 ◽  
Author(s):  
MARJOLEIN C. J. CANIËLS ◽  
CEES J. GELDERMAN ◽  
JAN M. ULIJN

Case study based literature on relationship development presents in-depth information on contextual factors in relationship development. However, little quantitative evidence is available about key aspects of buyer-supplier relationships in each stage of its development, such as the level of trust/commitment, buyer's and supplier's dependence. The study will try to fill this gap by identifying and quantifying these aspects from the buyer's perspective in each development stage. A comprehensive survey among 238 Dutch purchasing professionals provides evidence on how these characteristics of relationships change when relationships develop over time. The results largely confirm the hypotheses, which stem from the extant literature about organizational dependence and trust/commitment. A notable finding is that the buyer perceives to be dependent on the supplier, even in a desirable relationship. Managerial implications are that: (1) industrial marketers should be aware that professional purchasers feel dominated by them, even in relationships that are positively evaluated and therefore desirable in the view of the buyer; and (2) that purchasers should be aware that dependence implies vulnerability, even when the relationship is still developing in an otherwise desirable way.


2016 ◽  
Vol 10 (1) ◽  
pp. 61-77 ◽  
Author(s):  
Anton Agus Setyawan ◽  
Bernardinus Maria Purwanto ◽  
Basu Swastha Dharmmesta ◽  
Sahid Susilo Nugroho

Purpose – This paper aims to explore business relationship framework between two companies. In this research, relationship marketing and transaction cost were used as frameworks to analyze business relationship of two different kinds of companies in Indonesia, oil company and hypermarket. Gronroos (1994) defines relationship marketing is establishing, maintaining and enhancing relationships with customers and other partners, at a profit, so that the objectives of the parties involved are met. This is achieved by a mutual exchange and fulfillment of promises. This definition is a key to analyze the relationship of retailer and their supplier. In contrast, Williamson (1980) argued that relationship in business organization is based on their economic interest, and this approach is known as transaction cost approach. In this kind of relationship, business organizations consider cost and benefit of business relationship. Design/methodology/approach – The design of this study is triangulation. Two approaches were used to answer the research questions. A survey involving 204 respondents was conducted. These are companies in Indonesia oil and gas and retail industries. The types of power of those companies were analyzed using descriptive statistic and paired t test. Also, case study was conducted to gain depth information of two companies, with a large number of business partners among the respondents. The design of case study is holistic case study. Findings – The result shows that, in the oil company, the relationship between a company and their supplier is tied on a strict contract. In fact, the relationship of supplier and company in a fuel company based on transaction cost theory. In the retail company, the relationship of supplier and retailer based on trust, commitment and satisfaction. Those three construct are the foundation of relationship marketing. Companies in those two industries tend to use non-coercive power to influence their business partners. Originality/value – This study analyzes type of business relationship in industries in emerging markets. It also discusses type of influence strategy used by companies to control their business partners to gain mutual benefit.


Author(s):  
Frederick A. A. Kingdom ◽  
Ali Yoonessi ◽  
Elena Gheorghiu

The Leaning Tower Illusion is the illusion in which two identical images of the Leaning Tower of Pisa photographed from below, placed side by side, appear to rise at different angles. The illusion is not restricted to the Pisa tower however; it occurs in any pair of identical images of objects that appear to recede into the distance. This chapter argues that the illusion results from the misapplication of the visual system’s in-built mechanisms for correcting the distortions due to perspective in two-dimensional images of three-dimensional scenes. The relationship between the Leaning Tower illusion and size constancy illusions is discussed, and it is concluded that they are likely to be closely related.


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