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Pardavimų sektoriuje dirbančių darbuotojų emocinio intelekto, subjektyvaus darbo efektyvumo vertinimo bei darbe patiriamo streso sąsajos / Relationship among sales sector employees emotional intelligence, subjective assessment of work efficiency and work-related stressNaudžiūnas, Mindaugas 05 June 2014 (has links)
Tyrimo tikslas- ištirti pardavimų sektoriuje dirbančių asmenų emocinį intelektą, patiriamą stresą ir subjektyviai vertinamą darbo atlikimą, surasti šių konstruktų tarpusavio sąsajas, bei sąsajas su sociodemografiniais rodikliais.
Tyrime dalyvavo 252 respondentai (237 moterys ir 15 vyrų). Respondentų amžius svyravo nuo 19 iki 59 metų.Tiriamųjų darbo stažas pardavėjo pareigose svyravo nuo 0 iki 32 metų.
Tyrime naudotos metodikos: Psichologinės įtampos vertinimo klausimynas(Health and Safety Executive Management Standards Indicator Tool; S. Palmer, C. Cooper, 2007); Emocijų įvertinimo skalė (The Assesing Emotions Scale; Schutte N.S., Malouff J.M., Bhullar N., 2009) ir Darbo efektyvumo skalė (Job performance scale Dubinsky, Mattson, 1979).
Tyrimo rezultatai parodė, kad moterys, turinčios mažesnį nei dviejų metų darbo stažą pardavėjo pareigose geriau valdo kitų asmenų emocijas nei tos moterys, kurios yra išdirbusios pardavėjo pareigose daugiau nei dveji metai. Moterys, kurių amžius yra virš 30 metų subjektyviai efektyviau atlieka savo darbą nei tos moterys, kurių amžius yra nuo 19 iki 30 metų. Moterys, turinčios didesnį nei dviejų metų darbo stažą pardavėjo pareigose, patiria mažiau streso darbo vietoje nei tos moterys, kurių darbo stažas pardavėjo pareigose yra iki dviejų metų. Didėjant moterų, dirbančių pardavimo sektoriuje, emociniam intelektui, mažėja jų patiriamas stresas darbo vietoje. Mažėjant moterų, dirbančių pardavimo sektoriuje, darbe patiriamam stresui, didėja jų... [toliau žr. visą tekstą] / The aim of the study was to explore links among sales sector employees emotional intelligence, subjective assessment of work performance and work-related stress and relationship with sociodemographic characteristics.
The study included 252 (237 women and 15 men) residents whose age was from 19 to 59 years old. Residents in sales sector were working from 0 to 32 years.
Research methods are: Health and Safety Executive Management Standards Indicator Tool (S. Palmer, C. Cooper (2007), The Assesing Emotions Scale (Schutte N.S., Malouff J.M., Bhullar N. (2009) and Job performance scale (Dubinsky, Mattson (1979).
The results of the research showed that women with less than two years sales experience had better control over emotions of others than those with more than two years tenure. Women over 30 years at age perform their jobsubjectively more productive than younger women ( age btetween 19 to 30 years). Women with more than two years sales experience indicated having work-related stress than women with less than two years sales experience. The increase of emotional intelligence was related to the decrease of their eork-related stress. Decrease of work-related stress was relatedto the increase of their subjective assesement of work performance. The increase of emotional intelligence scores was realated to the increase of subjective job performance. Also emotional intelligence performs as a mediator between work-related stress and subjective work performance. In this way it... [to full text]
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Avaliação nutricional pré-operatória e risco cirúrgico em pacientes com tumores do trato gastrintestinal superiorPoziomyck, Aline Kirjner January 2011 (has links)
Desnutrição, causa importante de morbimortalidade em pacientes com câncer tem sido avaliada por diferentes critérios e métodos. O objetivo deste estudo foi comparar métodos subjetivo, antropométrico e laboratorial como preditores de morbimortalidade. Setenta e quatro pacientes (45 homens, 29 mulheres) com média (DP) de idade de 62,8 (10,2) anos, submetidos a esofagectomias (n=19), gastrectomias (n=43) e pancreatectomias (n=12) foram avaliados usando-se ASG-PPP, antropometria clássica, MAP e métodos laboratoriais. Quarenta e três (58%) pacientes apresentaram perda ponderal maior que 10% em 6 meses. Vinte e cinco, 34 e 15 pacientes apresentaram ASG-PPP A, B e C respectivamente, a média (DP) de MAPD foi de 13 (3,5) mm e MAPND foi 12 (3,6) mm. Os níveis médios (DP) de albumina foi 3,8 (0,5) g/dL e de hemoglobina foi 12,5 (1,8) g/dL. O tempo médio (DP) de internação foi de 34 (29) dias para os casos de óbitos e de 23 (13) dias para os sobreviventes (NS). A ASGPPP B foi significativamente associada à maior mortalidade (n=12) quando comparado às categorias C (n=10) e A (n=2; teste exato de Fisher; p<0,001). Pacientes com média (DP) da MAPD de 11 (3,7) mm morreram mais que aqueles com média (DP) de 14 (3) mm (t de student, p<0.001). A Área sob a curva ROC (IC95%) para ASG-PPP foi de 0,75 (0,64-0,87; p<0,001) e de 0,74 (0,61-0,87; p<0,001) para a MAPD. Nenhum método significativamente associou-se ao tempo de internação; porém, a avaliação nutricional desses pacientes pela ASG-PPP e MAPD permitiu fidedignamente predizer mortalidade. / Malnutrition, a major cause of morbidity and mortality in patients with cancer has been assessed by different criteria and methods. The aim of this study was to compare subjective, anthropometric and laboratorial methods as predictors of morbidity and mortality. Seventy-four patients (45 men, 29 women) with a mean (SD) age 62.8 (10.2) years who underwent esophagectomy (n=19), gastrectomy (n=43) and pancreatectomy (n=12) were assessed using PG-SGA, classic anthropometry, APM and laboratory methods. Forty-three (58%) patients experienced weight loss greater than 10% in 6 months. Twenty-five, 34 and 15 patients had SGA-A, B and C respectively, the mean (SD) of DAPM was 13 (3.5) mm and NDAPM was 12 (3.6) mm. Mean levels (SD) albumin was 3.8 (0.5) g/dL, and hemoglobin was 12.5 (1.8) g/dL. The mean (SD) hospital stay was 34 (29) days for cases and 23 deaths (13) days for survivors (NS). The SGA-B was significantly associated with higher mortality (n=12) compared to category C (n=10) and A (n=2, Fisher exact test, p <0.001). Patients with a mean (SD) of DAPM below 10.8 (3.7) mm had more deaths than those with mean (SD) greater than 14 (3) mm (t student, p <0.001). The area under the ROC curve (95%) for ASG-PPP was 0.75 (0.64 to 0.87, p <0.001) and 0.74 (0.61 to 0.87, p <0.001) for the DAPM. None of the methods was significantly related to hospital stay, but nutritional assessment of these patients by the PG-SGA and DAPM allowed reliably predicting mortality.
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Avaliação nutricional pré-operatória e risco cirúrgico em pacientes com tumores do trato gastrintestinal superiorPoziomyck, Aline Kirjner January 2011 (has links)
Desnutrição, causa importante de morbimortalidade em pacientes com câncer tem sido avaliada por diferentes critérios e métodos. O objetivo deste estudo foi comparar métodos subjetivo, antropométrico e laboratorial como preditores de morbimortalidade. Setenta e quatro pacientes (45 homens, 29 mulheres) com média (DP) de idade de 62,8 (10,2) anos, submetidos a esofagectomias (n=19), gastrectomias (n=43) e pancreatectomias (n=12) foram avaliados usando-se ASG-PPP, antropometria clássica, MAP e métodos laboratoriais. Quarenta e três (58%) pacientes apresentaram perda ponderal maior que 10% em 6 meses. Vinte e cinco, 34 e 15 pacientes apresentaram ASG-PPP A, B e C respectivamente, a média (DP) de MAPD foi de 13 (3,5) mm e MAPND foi 12 (3,6) mm. Os níveis médios (DP) de albumina foi 3,8 (0,5) g/dL e de hemoglobina foi 12,5 (1,8) g/dL. O tempo médio (DP) de internação foi de 34 (29) dias para os casos de óbitos e de 23 (13) dias para os sobreviventes (NS). A ASGPPP B foi significativamente associada à maior mortalidade (n=12) quando comparado às categorias C (n=10) e A (n=2; teste exato de Fisher; p<0,001). Pacientes com média (DP) da MAPD de 11 (3,7) mm morreram mais que aqueles com média (DP) de 14 (3) mm (t de student, p<0.001). A Área sob a curva ROC (IC95%) para ASG-PPP foi de 0,75 (0,64-0,87; p<0,001) e de 0,74 (0,61-0,87; p<0,001) para a MAPD. Nenhum método significativamente associou-se ao tempo de internação; porém, a avaliação nutricional desses pacientes pela ASG-PPP e MAPD permitiu fidedignamente predizer mortalidade. / Malnutrition, a major cause of morbidity and mortality in patients with cancer has been assessed by different criteria and methods. The aim of this study was to compare subjective, anthropometric and laboratorial methods as predictors of morbidity and mortality. Seventy-four patients (45 men, 29 women) with a mean (SD) age 62.8 (10.2) years who underwent esophagectomy (n=19), gastrectomy (n=43) and pancreatectomy (n=12) were assessed using PG-SGA, classic anthropometry, APM and laboratory methods. Forty-three (58%) patients experienced weight loss greater than 10% in 6 months. Twenty-five, 34 and 15 patients had SGA-A, B and C respectively, the mean (SD) of DAPM was 13 (3.5) mm and NDAPM was 12 (3.6) mm. Mean levels (SD) albumin was 3.8 (0.5) g/dL, and hemoglobin was 12.5 (1.8) g/dL. The mean (SD) hospital stay was 34 (29) days for cases and 23 deaths (13) days for survivors (NS). The SGA-B was significantly associated with higher mortality (n=12) compared to category C (n=10) and A (n=2, Fisher exact test, p <0.001). Patients with a mean (SD) of DAPM below 10.8 (3.7) mm had more deaths than those with mean (SD) greater than 14 (3) mm (t student, p <0.001). The area under the ROC curve (95%) for ASG-PPP was 0.75 (0.64 to 0.87, p <0.001) and 0.74 (0.61 to 0.87, p <0.001) for the DAPM. None of the methods was significantly related to hospital stay, but nutritional assessment of these patients by the PG-SGA and DAPM allowed reliably predicting mortality.
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Avaliação nutricional pré-operatória e risco cirúrgico em pacientes com tumores do trato gastrintestinal superiorPoziomyck, Aline Kirjner January 2011 (has links)
Desnutrição, causa importante de morbimortalidade em pacientes com câncer tem sido avaliada por diferentes critérios e métodos. O objetivo deste estudo foi comparar métodos subjetivo, antropométrico e laboratorial como preditores de morbimortalidade. Setenta e quatro pacientes (45 homens, 29 mulheres) com média (DP) de idade de 62,8 (10,2) anos, submetidos a esofagectomias (n=19), gastrectomias (n=43) e pancreatectomias (n=12) foram avaliados usando-se ASG-PPP, antropometria clássica, MAP e métodos laboratoriais. Quarenta e três (58%) pacientes apresentaram perda ponderal maior que 10% em 6 meses. Vinte e cinco, 34 e 15 pacientes apresentaram ASG-PPP A, B e C respectivamente, a média (DP) de MAPD foi de 13 (3,5) mm e MAPND foi 12 (3,6) mm. Os níveis médios (DP) de albumina foi 3,8 (0,5) g/dL e de hemoglobina foi 12,5 (1,8) g/dL. O tempo médio (DP) de internação foi de 34 (29) dias para os casos de óbitos e de 23 (13) dias para os sobreviventes (NS). A ASGPPP B foi significativamente associada à maior mortalidade (n=12) quando comparado às categorias C (n=10) e A (n=2; teste exato de Fisher; p<0,001). Pacientes com média (DP) da MAPD de 11 (3,7) mm morreram mais que aqueles com média (DP) de 14 (3) mm (t de student, p<0.001). A Área sob a curva ROC (IC95%) para ASG-PPP foi de 0,75 (0,64-0,87; p<0,001) e de 0,74 (0,61-0,87; p<0,001) para a MAPD. Nenhum método significativamente associou-se ao tempo de internação; porém, a avaliação nutricional desses pacientes pela ASG-PPP e MAPD permitiu fidedignamente predizer mortalidade. / Malnutrition, a major cause of morbidity and mortality in patients with cancer has been assessed by different criteria and methods. The aim of this study was to compare subjective, anthropometric and laboratorial methods as predictors of morbidity and mortality. Seventy-four patients (45 men, 29 women) with a mean (SD) age 62.8 (10.2) years who underwent esophagectomy (n=19), gastrectomy (n=43) and pancreatectomy (n=12) were assessed using PG-SGA, classic anthropometry, APM and laboratory methods. Forty-three (58%) patients experienced weight loss greater than 10% in 6 months. Twenty-five, 34 and 15 patients had SGA-A, B and C respectively, the mean (SD) of DAPM was 13 (3.5) mm and NDAPM was 12 (3.6) mm. Mean levels (SD) albumin was 3.8 (0.5) g/dL, and hemoglobin was 12.5 (1.8) g/dL. The mean (SD) hospital stay was 34 (29) days for cases and 23 deaths (13) days for survivors (NS). The SGA-B was significantly associated with higher mortality (n=12) compared to category C (n=10) and A (n=2, Fisher exact test, p <0.001). Patients with a mean (SD) of DAPM below 10.8 (3.7) mm had more deaths than those with mean (SD) greater than 14 (3) mm (t student, p <0.001). The area under the ROC curve (95%) for ASG-PPP was 0.75 (0.64 to 0.87, p <0.001) and 0.74 (0.61 to 0.87, p <0.001) for the DAPM. None of the methods was significantly related to hospital stay, but nutritional assessment of these patients by the PG-SGA and DAPM allowed reliably predicting mortality.
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Programová implementace subjektivnich testů zvukové kvality / Software implementation of the subjective assessments of sound qualityŠpeta, Marek January 2011 (has links)
The focus of this diploma thesis is on methods for the subjective assessment of sound quality according to recommandations given by International Telecommunication Union ITU. The thesis is thematically divided into four parts. The first part is an interpretation of methods based on internationally accepted standards (method of small impairments, MUSHRA, general methods). The second part describes the functional blocks of application developed for this thesis in LabVIEW enviroment. Next part explains its practical application, especially its running possibilities. The last part describes a listening experiment, aim of which was to verify the application's features and to compare the results of the subjective method used in the experiment with the results of the objective method PEAQ.
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Subjektivní hodnocení kvality videosekvencí / Subjective quality evaluation of video sequencesKrmela, Tomáš January 2012 (has links)
This master´s work is focused on the comparison of subjective assessment of the quality of video sequences. In this study, data are obtained by hardware and sofware techniques and they are compared. In the introduction, methods of video compressions are described. The main part of this work deals wtih the exploring of different methods of subjective assessment of the quality of video sequences. Finally, obtained results from different methods, are evaluated and discussed.
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Évaluation subjective de la qualité : proposition d'un système de référence pour les codecs en bande élargie / Subjective quality assessment : proposal of a reference system for Wideband codecsZango, Tiraogo Abdoulaye Yves 06 February 2013 (has links)
L'évolution des systèmes de télécommunications conduit à la conception de codecs de la parole et du son de plus en plus sophistiqués, accroissant ainsi la concurrence de l'industrie de l'audio et accordant une importance grandissante à la qualité de service. Si l'évaluation de la qualité des codecs peut s'opérer suivant des mesures objectives ou subjectives, les secondes restent les plus fiables dans la mesure où la qualité perçue par les utilisateurs est intrinsèquement subjective. Toutefois, les tests subjectifs requièrent des signaux d'ancrage, i.e. des signaux artificiels visant la reproduction des défauts perceptifs des codecs de sorte que les dégradations provoquées soient aisément contrôlables. Le système de référence actuellement normalisé par l'Union Internationale des Télécommunications est le MNRU (Modulated Noise Reference Unit) qui simule le bruit de quantification introduit par les premiers codecs en forme d'onde. L'évolution de la technologie rend aujourd'hui ce système obsolète, et il s'agit donc de concevoir un nouveau système d'ancrage plus adapté aux codecs actuels. En considérant la qualité audio comme un objet multidimensionnel, nous avons mis en évidence un espace perceptif à quatre dimensions, et ce à partir de deux approches de réduction de dimensionnalité, l'AFM (Analyse Factorielle Multiple) et la MDS 3–voies (MultiDimensional Scaling). A partir des quatre dimensions identifiées – « Réduction de la largeur de bande », « Bruit de fond », « Écho/Réverbération » et « Distorsion de la parole » –, nous avons modélisé puis validé les signaux d'ancrage des trois premières dimensions et proposé deux modèles de signaux d'ancrage pour la quatrième. / The evolution of technology led to the design of very sophisticated speech and audio codecs. Accordingly, the competition in audio devices manufacturing has increased and today the quality of service becomes crucial for telecommunications operators. Quality of codecs is assessed through objective and subjective measures, the second ones being the most reliable since the quality perceived by users is inherently subjective. Nevertheless, subjective tests require anchor signals corresponding to artificial signals, which reproduce the perceptual impairments of codecs in such a manner that the amount of degradation can be easily controlled. The reference system currently standardized by the International Telecommunication Union is the Modulated Noise Reference Unit (MNRU), which simulates the quantization noise of the first generation of waveform codecs. Due to the evolution of codecs, the MNRU system became obsolete and researchers aim at designing a new reference system of anchor signals more suited to current codecs. Assuming that speech and audio quality is multidimensional, we first identified four perceptual dimensions using two dimensionality reduction techniques – the MFA (Multiple Factor Analysis) and the 3–way MDS (MultiDimensional Scaling). From the identified dimensions, namely “Bandwidth limitation”, “Background noise”, “Echo/Reverberation” and “Speech distortion”, we succeeded in modeling and validating anchor signals for three of them and we suggested two models of anchor signals for the last one.
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Avaliação objetiva de qualidade de segmentação. / Objective assessment of segmentation quality.Sanches, Silvio Ricardo Rodrigues 21 May 2013 (has links)
A avaliação de qualidade de segmentação de vídeos tem se mostrado um problema pouco investigado no meio científico. Apesar disso, estudos recentes na área resultaram em algumas métricas que têm como finalidade avaliar objetivamente a qualidade da segmentação produzida pelos algoritmos. Tais métricas consideram as diferentes formas em que os erros ocorrem (fatores perceptuais) e seus parâmetros são ajustados de acordo com a aplicação em que se pretende utilizar os vídeos segmentados. Neste trabalho apresentam-se: i) uma avaliação da métrica que representa o estado-da-arte, demonstrando que seu desempenho varia de acordo com o algoritmo; ii) um método subjetivo para avaliação de qualidade de segmentação; e iii) uma nova métrica perceptual objetiva, derivada do método subjetivo aqui proposto, capaz de encontrar o melhor ajuste dos parâmetros de dois algoritmos de segmentação encontrados na literatura, quando os vídeos por eles segmentados são utilizados na composição de cenas em ambientes de Teleconferência Imersiva. / Assessment of video segmentation quality is a problem seldom investigated by the scientific community. Nevertheless, recent studies presented some objective metrics to evaluate algorithms. Such metrics consider different ways in which segmentation errors occur (perceptual factors) and its parameters are adjusted according to the application for which the segmented frames are intended. In this work: i) we demonstrate empirically that the performance of existing metrics changes according to the segmentation algorithm; ii) we developed a subjective method to evaluate segmentation quality; and iii) we contribute with a new objective metric derived on the basis of experiments from subjective method in order to adjust the parameters of two bilayer segmentation algorithms found in the literature when these algorithms are used for compose scenes in Immersive Teleconference environments.
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Método de avaliação de qualidade de vídeo por otimização condicionada. / Video quality assessment method based on constrained optimization.Begazo, Dante Coaquira 24 November 2017 (has links)
Esta Tese propõe duas métricas objetivas para avaliar a percepção de qualidade de vídeos sujeitos a degradações de transmissão em uma rede de pacotes. A primeira métrica usa apenas o vídeo degradado, enquanto que a segunda usa os vídeos de referência e degradado. Esta última é uma métrica de referência completa (FR - Full Reference) chamada de QCM (Quadratic Combinational Metric) e a primeira é uma métrica sem referência (NR - No Reference) chamada de VQOM (Viewing Quality Objective Metric). Em particular, o procedimento de projeto é aplicado à degradação de variação de atraso de pacotes (PDV - Packet Delay Variation). A métrica NR é descrita por uma spline cúbica composta por dois polinômios cúbicos que se encontram suavemente num ponto chamado de nó. Para o projeto de ambas métricas, colhem-se opiniões de observadores a respeito das sequências de vídeo degradadas que compõem o conjunto. A função objetiva inclui o erro quadrático total entre as opiniões e suas estimativas paramétricas, ainda consideradas como expressões algébricas. Acrescentam-se à função objetiva três condições de igualdades de derivadas tomadas no nó, cuja posição é especificada dentro de uma grade fina de pontos entre o valor mínimo e o valor máximo do fator de degradação. Essas condições são afetadas por multiplicadores de Lagrange e adicionadas à função objetiva, obtendo-se o lagrangiano, que é minimizado pela determinação dos coeficientes subótimos dos polinômios em função de cada valor do nó na grade. Finalmente escolhe-se o valor do nó que produz o erro quadrático mínimo, determinando assim os valores finais para dos coeficientes do polinômio. Por outro lado, a métrica FR é uma combinação não-linear de duas métricas populares, a PSNR (Peak Signal-to-Noise Ratio) e a SSIM (Structural Similarity Index). Um polinômio completo de segundo grau de duas variáveis é usado para realizar a combinação, porque é sensível a ambas métricas constituintes, evitando o sobreajuste em decorrência do baixo grau. Na fase de treinamento, o conjunto de valores dos coeficientes do polinômio é determinado através da minimização do erro quadrático médio para as opiniões sobre a base de dados de treino. Ambas métricas, a VQOM e a QCM, são treinadas e validadas usando uma base de dados, e testadas com outra independente. Os resultados de teste são comparados com métricas NR e FR recentes através de coeficientes de correlação, obtendo-se resultados favoráveis para as métricas propostas. / This dissertation proposes two objective metrics for estimating human perception of quality for video subject to transmission degradation over packet networks. The first metric just uses traffic data while the second one uses both the degraded and the reference video sequences. That is, the latter is a full reference (FR) metric called Quadratic Combinational Metric (QCM) and the former one is a no reference (NR) metric called Viewing Quality Objective Metric (VQOM). In particular, the design procedure is applied to packet delay variation (PDV) impairments, whose compensation or control is very important to maintain quality. The NR metric is described by a cubic spline composed of two cubic polynomials that meet smoothly at a point called a knot. As the first step in the design of either metric, the spectators score a training set of degraded video sequences. The objective function for designing the NR metric includes the total square error between the scores and their parametric estimates, still regarded as algebraic expressions. In addition, the objective function is augmented by the addition of three equality constraints for the derivatives at the knot, whose position is specified within a fine grid of points between the minimum value and the maximum value of the degradation factor. These constraints are affected by Lagrange multipliers and added to the objective function to obtain the Lagrangian, which is minimized by the suboptimal polynomial coefficients determined as a function of each knot in the grid. Finally, the knot value is selected that yields the minimum square error. By means of the selected knot value, the final values of the polynomial coefficients are determined. On the other hand, the FR metric is a nonlinear combination of two popular metrics, namely, the Peak Signal-to-Noise Ratio (PSNR) and the Structural Similarity Index (SSIM). A complete second-degree two-variable polynomial is used for the combination since it is sensitive to both constituent metrics while avoiding overfitting. In the training phase, the set of values for the coefficients of this polynomial is determined by minimizing the mean square error to the opinions over the training database. Both metrics, the VQOM and the QCM, are trained and validated using one database and tested with a different one. The test results are compared with recent NR and FR metrics by means of correlation coefficients, obtaining favorable results for the proposed metrics.
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Avaliação objetiva de qualidade de segmentação. / Objective assessment of segmentation quality.Silvio Ricardo Rodrigues Sanches 21 May 2013 (has links)
A avaliação de qualidade de segmentação de vídeos tem se mostrado um problema pouco investigado no meio científico. Apesar disso, estudos recentes na área resultaram em algumas métricas que têm como finalidade avaliar objetivamente a qualidade da segmentação produzida pelos algoritmos. Tais métricas consideram as diferentes formas em que os erros ocorrem (fatores perceptuais) e seus parâmetros são ajustados de acordo com a aplicação em que se pretende utilizar os vídeos segmentados. Neste trabalho apresentam-se: i) uma avaliação da métrica que representa o estado-da-arte, demonstrando que seu desempenho varia de acordo com o algoritmo; ii) um método subjetivo para avaliação de qualidade de segmentação; e iii) uma nova métrica perceptual objetiva, derivada do método subjetivo aqui proposto, capaz de encontrar o melhor ajuste dos parâmetros de dois algoritmos de segmentação encontrados na literatura, quando os vídeos por eles segmentados são utilizados na composição de cenas em ambientes de Teleconferência Imersiva. / Assessment of video segmentation quality is a problem seldom investigated by the scientific community. Nevertheless, recent studies presented some objective metrics to evaluate algorithms. Such metrics consider different ways in which segmentation errors occur (perceptual factors) and its parameters are adjusted according to the application for which the segmented frames are intended. In this work: i) we demonstrate empirically that the performance of existing metrics changes according to the segmentation algorithm; ii) we developed a subjective method to evaluate segmentation quality; and iii) we contribute with a new objective metric derived on the basis of experiments from subjective method in order to adjust the parameters of two bilayer segmentation algorithms found in the literature when these algorithms are used for compose scenes in Immersive Teleconference environments.
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