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Robust two-view reconstruction procedure for geometrical model retrieving

Walczak J., Wojciechowski A.

Journal of Applied Computer Science

2018

Vol. 26, nr 1

87--104

In this paper we present the enhancement of the standard two-view reconstruction procedure. An ordinary approach assumes determination of points’ correspondences followed by projection matrix estimation, to finally refine results with bundle adjustment taking as a cost function reprojection error. Our contribution is realized in two manners: introducing an additional step of outliers rejection, changing cost function of bundle adjustment process to Relative Reprojection Error (R) and applying central difference as a method for Jacobian matrix approximation. Tests revealed gain in average R with lower variance, for confidence level of 0.95. Besides accuracy improvement, the suggested modifications supply the final result in the time virtually independent on initial object’s complexity and, in most cases, shorter than the standard approach.

Koncepcja holonowego modelu doskonalenia jakości w małych i średnich przedsiębiorstwach

Jasiulewicz-Kaczmarek M., Misztal A., Butlewski M.

Zarządzanie Przedsiębiorstwem

2014

Vol. 17, nr 4

7--13

The article refers to the ability of continuous improvement of processes and their assessment in Polish small and medium-sized enterprises (SMEs). The research problem emerges from the lack of a clear and understandable model of self-assessment for this group of enterprises and also a minimal ability to precisely define areas for improvement. The way to competitiveness in these organizations usually starts with implementation of pro-quality management standards respondent to ISO 9001 standard requirements. The next steps are usually quite chaotic and do not employ a systematic approach and holistic view of an enterprise. Polish Quality Award and EFQM excellence models are too general at this stage of a SME organization’s maturity. Thus, the main goal of the author’s paper was to develop and verify the idea of a modularized measuring model of an organization’s excellence. The article presents the results of literature research, the developed simplified diagram of the theoretical model and, consequently, focused research – a revised model of excellence for small and medium-sized enterprises. The model consists of five modules defined by terms as: quality, maintenance, ergonomics and OSH, environment and logistics, and for each of the modules offers six evaluation criteria: policy and strategy, preventive measures, teamwork, staff qualifications, and communication (internal and external).