This semestral thesis describes the possibilities of source coding videos, the attributes of the videos and their recommended changes for test. Subjective methods of scores of quality and their division into metrics with references and without references are delineated. In this work, a draft of videos for test of comparison of set metrics is specified here. Further, the coding and options of attributes of videosequences for scoring of the quality of the picture is presented. The displaying system is described and quazicrowdsorcing system of collecting the datas was created.

Each day, the need for as well as the amount of network-based applications grows and with it the implementation of RESTful APIs. For all these APIs there is a need for documentation of the API's behavior, its benefits, how it interacts with other APIs, and its expected result. To solve this; An API specification is constructed. This is a document containing the design philosophy of the APIs and can act as a guideline for how they should be constructed. When designing API specifications it is often difficult to understand what objective quality the API document upholds. To understand the objective quality of an API specification it must first be understood what a good objective quality is in this regard. We used static code tests (linter rules) that are mapped to three quality attributes that fit the industry's consensus of the most important quality attributes that need to be complacent for a good quality API. We then implemented an automatic process of splitting API specifications into positive and negative training data using the linter results of the rules. The resulting data is used to train our BERT model.The model will then be able to give an objective score to unseen API specifications. We then used a saliency map (textual heatmap) in order to understand BERT's decisions, which added the potential to generate new linter rules from the given results. After testing unseen API specifications on our BERT model, we saw that it was able to generate a reasonable quality score. Although, when inserting smaller features to generate a textual heatmap, the predictions of our model were not correct, hence not making it possible to understand BERT's decisions through our implementation. This also meant that new rules could not be acquired from reviewing the BERT's result.

「品牌形象好的產品，其產品品質也會比較好」的想法，是許多消費者在購物時所依賴的經驗法則。然而，在現今的消費市場，品牌形象是否真能反映出品質的高低？本研究採用民國79年1月至民國94年6月份的「中國民國消費者報導」，探討在16年間，98個產品類別中，品牌形象與產品品質的相關性。 研究結果顯示，品牌形象不能做為產品品質的訊號，在98個產品項中，兩者的相關平均值為-0.14728，並且在各個產品項內，兩者相關性呈現大幅的差異。同時，在研究影響品牌形象與產品品質的中介變數後，本研究發現，在台灣消費市場，相較於開發中國家的產品，已開發國家的產品的品牌形象與產品品質相關性較高；而本研究的另外兩項中介變數：「耐久品/非耐久品」以及「搜尋品/經驗品」，並不能顯著地解釋品牌形象與產品品質相關性的差異。 根據本研究的分析，未來消費者在購買產品時，必須蒐集更多的產品相關資訊以促進購買決策的正確性，而不能單以品牌形象作為最終購買決策的依據。 / It seems that “better brand image implies higher quality” is the rule of thumb. However, is it true in the consumption market nowadays? This thesis uses 98 product category test results of the Chinese, Taipei Consumer Report from the period of January 1990 to June 2005 to examine the relationship between brand image and quality. The results of this thesis indicate that brand image is not a good signal of quality. The correlation coefficient is -0.14728 in average and greatly varying levels of correlation across 98 product category. At the same time, after investigating the variables, this thesis finds out that comparing to the product from developing countries, those from developed countries have higher brand image- quality correlation levels. Besides, other two variables, “durable/non-durable goods” and “search/experience goods”, do not significantly influence the correlation levels. According to the analysis, consumers need to collect more product-related information before final purchase decisions, instead of depending on brand image solely.

This diploma thesis deals with the problem of using an objective quality assessment methods in image data compression. Lossy compression always introduces some kind of distortion into the processed data causing degradation in the quality of the image. The intensity of this distortion can be measured using subjective or objective methods. To be able to optimize compression algorithms the objective criteria are used. In this work the SSIM index as a useful tool for describing the quality of compressed images has been presented. Lossy compression scheme is realized using the wavelet transform and SPIHT algorithm. The modification of this algorithm using partitioning of the wavelet coefficients into the separate tree-preserving blocks followed by independent coding, which is especially suitable for parallel processing, was implemented. For the given compression ratio the traditional problem is being solved – how to allocate available bits among the spatial blocks to achieve the highest possible image quality. The possible approaches to achieve this solution were discussed. As a result, some methods for bit allocation based on MSSIM index were proposed. To test the effectivity of these methods the MATLAB environment was used.

The presented diploma thesis in its theoretical part introduces the reader to the issue of the quality of life. This polysemantical term, which can be hardly defined, is based on a wide range of views and applicable approaches. The first chapter deals with the definition and description of basic and related concepts. The second part describes the instruments of social policy, employment policy and its division. The conclusion of the thesis offers an objective and subjective measures of the quality of life, which were applied to the author's examined districts, whose respondents were young unemployed within thirty years of age.

This thesis deals with description of human hearing, audio and speech codecs, description of objective measure of quality and practical comparison of codecs. Chapter about audio codecs consists of description of lossless codec FLAC and lossy codecs MP3 and Ogg Vorbis. In chapter about speech codecs is description of linear predictive coding and G.729 and OPUS codecs. Evaluation of quality consists of description of segmental signal-to- noise ratio and perceptual evaluation of quality – WSS and PESQ. Last chapter deals with description od practical part of this thesis, that is comparison of memory and time consumption of audio codecs and perceptual evaluation of speech codecs quality.

Dans cette thèse CIFRE en collaboration entre le Centre de Mathématiques et de leurs Applications, École Normale Supérieure de Cachan et l’entreprise DxO, nous abordons le problème de la décomposition additive d’une image en base et détail. Une telle décomposition est un outil fondamental du traitement d’image. Pour une application à la photographie professionnelle dans le logiciel DxO Photolab, il est nécessaire que la décomposition soit exempt d’artefact. Par exemple, dans le contexte de l’amélioration de contraste, où la base est réduite et le détail augmenté, le moindre artefact devient fortement visible. Les distorsions de l’image ainsi introduites sont inacceptables du point de vue d’un photographe.L’objectif de cette thèse est de trouver et d’étudier les filtres les plus adaptés pour effectuer cette tâche, d’améliorer les meilleurs et d’en définir de nouveaux. Cela demande une mesure rigoureuse de la qualité de la décomposition en base plus détail. Nous examinons deux artefact classiques (halo et staircasing) et en découvrons trois autres types tout autant cruciaux : les halos de contraste, le cloisonnement et les halos sombres. Cela nous conduit à construire cinq mire adaptées pour mesurer ces artefacts. Nous finissons par classer les filtres optimaux selon ces mesures, et arrivons à une décision claire sur les meilleurs filtres. Deux filtres sortent du rang, dont un proposé dans cette thèse. / In this CIFRE thesis, a collaboration between the Center of Mathematics and their Applications, École Normale Supérieure de Cachan and the company DxO, we tackle the problem of the additive decomposition of an image into base and detail. Such a decomposition is a fundamental tool in image processing. For applications to professional photo editing in DxO Photolab, a core requirement is the absence of artifacts. For instance, in the context of contrast enhancement, in which the base is reduced and the detail increased, minor artifacts becomes highly visible. The distortions thus introduced are unacceptable from the point of view of a photographer.The objective of this thesis is to single out and study the most suitable filters to perform this task, to improve the best ones and to define new ones. This requires a rigorous measure of the quality of the base plus detail decomposition. We examine two classic artifacts (halo and staircasing) and discover three more sorts that are equally crucial: contrast halo, compartmentalization, and the dark halo. This leads us to construct five adapted patterns to measure these artifacts. We end up ranking the optimal filters based on these measurements, and arrive at a clear decision about the best filters. Two filters stand out, including one we propose.