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Subjective tests of influence of the content of the scene on the spatial effect of 3D images and videos
Kaučiarik, Filip ; Kufa, Jan (referee) ; Boleček, Libor (advisor)
This thesis is concerning with study of video sequence parameters which influence the quality of picture during watching 3D frames and videos. It´s focused on comparing individual parameters of video sequences which are spatial and temporal information and depth map range and their influence on subjective testing and assessment of quality of experience by respondents . This thesis contains specification of testing sequence plan based on diversity of video sequence parameters and also a layout of subjective testing. An absolute parameter J was determined to achieve the maximum effect of objective parameters of sequency to 3D effect and comfort of the scene within subjective assessment.
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An application for color coordinate transforms and color mixing
Jurzykowski, Michal ; Štukavec, Radim (referee) ; Slanina, Martin (advisor)
The most important human sense is sight. We can see thanks to eyes, which are very sensitive on small part of electromagnetic wave. White sunlight contents all the spectrum visible. By decomposition of white sunlight we get colour spectrum. We recognize colours by cones, which are sensitive on red, green and blue spectrum of white light. Informer times it was denited many colour models, which have been using additive and subtractive method od mixing colours. One of the first models which were matemacily defined was CIE 1931, also known as XYZ. Together with this model was created xy chromatic diagram for displaying of colour space. Best known colour models are RGB and CMY. In TV technics is used model YUV. Models HSV and HSL are more intuitiv. This models have three basic parameters: hue, saturation and brightness.
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Possibilities of simulation modeling of traffic accidents with reduced visibility
Rozsíval, Jan ; Motl, Jakub (referee) ; Bradáč, Albert (advisor)
The diploma thesis deals with the possibilities of simulation modeling with reduced visibility in the Virtual CRASH program, which as the only available programs allows work both with the help of mathematical models to simulate vehicle movement and change parameters to simulate reduced visibility, lighting, etc. The theoretical part contains a description of photometric quantities, deals with the human eye and its ability to see under reduced visibility, a description of the luxmeter meter and luminance analyzers. Here are four main reasons for reduced visibility and their description. It contains a sample of the most used programs used to deal with traffic accidents. The four types of headlights most commonly used in today's vehicles are listed and described. In the experimental part, two measurements were performed. The first measurement to obtain input values to obtain a black and white texture determining the shape of the light rays emanating from the vehicle headlights. The second experiment to obtain the contrasts of the white box, black box and pedestrian for subsequent comparison with the output of the Virtual CRASH program.
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EXPERT ANALYSIS OF SELECTED PROBLEMS SEEING PEDESTRIANS BY VEHICLE DRIVER IN VISIBILITY REDUCED BY DARKNESS
Sedlák, Jaroslav ; Kropáč, František (referee) ; Drahotský, Ivo (referee) ; Ptáček, Petr (referee) ; Bradáč, Albert (advisor)
The dissertation is focused on the problematic of the driver´s ability to see pedestrians in the conditions of driving at night. The first part tells the current view of these problematic, terms are defined: the outlook and the range of vision to see the obstacle. This part also describes various effects that are affecting the driver´s ability to see pedestrians while driving at night. Out of all mentioned effects, this project mainly focuses on two parameters – how is the driver´s ability to see a pedestrian affected by his obsolence and developing visual handicap. During the research, high number of respondents of wide range of age and various vision quality were present and attended the experiment. This project proposes a methodology of comparasion of those two parameters mentioned above. The main condition which must have been held was to create absolutelly identical conditions of the experiment used by wide range of respondetns. The best way how to possibly achive the best results is by using a video scene on the PC monitor. Two sets of photographies were made while preparing the experiment (2 various sets of clothes for the pedestrian) and these sets were sorted by using the Microsoft Office Power Point program. This made a simulation of a vehicle approaching a pedestrian at night. The measurement was attended by a large number of respondents who were divided into a total of nine categories, according to age and extent of ocular defects. The dissertation is a methodology for evaluating the measurements, determination of contrast and angular size of the watched object (pedestrian) using the scene on the PC monitor. At the end of the experiment is an evaluation of the measurements and put comments on the results obtained. This project proposses a method for the early detection of the driver´s perception when sighting barriers (pedestrian) using the electrophysiological examination method – the electroretinography (ERG). In this dissertation,the initial measurements were carried out using this method, when during the measurement was unfortunately found that the sensitivity of the method does not allow resolution changes of the electrical potential for so little intense stimuli such as the sight of pedestrians at the edge of the road. But it is not excluded that in the future the further development of the ophthalmological diagnostic method will increase the sensitivity so it will allow to spot the objective moment of registration the obstacle by the viusal organ
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Controlling of camera
Tylš, Ladislav ; Valach, Soběslav (referee) ; Richter, Miloslav (advisor)
This thesis describes the principles of making application which is able to set and control camera. The first part describes basic camera connections and it explains definition and specification of camera’s features. The second part of my thesis describes implementation of application, which can use more cameras to image preview, image acquisition and to simply set of camera’s features. To implement the applications we can use MATLAB and C++BUILDER uses opencv libraries.
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Methods for automated camera focusing
Kičina, Pavol ; Rášo, Ondřej (referee) ; Šmirg, Ondřej (advisor)
This bachelor´s thesis is about methods of focusing with web camera. Edge detection method and Discrete cosine transform method are use in this thesis. In program MatLab I create a program, which take a picture from web camera. With handle focusing this program shows information how much is picture focus. Functional and elementary are subject, which I use to compare. Advantages and disadvantages are in this thesis, with important elements about quality of focus,too.
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Diversity of iris coloration during evolution of geckos (Gekkota)
Ozerskyi, Serhii ; Brejcha, Jindřich (advisor) ; Šmíd, Jiří (referee)
Iris is an anatomical structure that performs the function of a diaphragm in the visual system of the eye. It usually occupies most of the visible part of the eye. In addition to the main function - not to let light pass by the pupil, iris can play many different roles due to the great variability of its coloration. Iris can be part of a camouflage or aposematic color, play a different role in intra- or interspecific communication. In some species, its color changes depending on age, season, biological cycles, or even quickly become marked in response to stimuli. Geckos (Gekkota) are distinguished by a particularly large variety of iris color. And in many of them, the iris pattern resembles branching veins. What significance and evolution history this pattern has is of interest. I used various models of evolutionary reconstruction in the R program to study the evolution of veined pattern of coloration of the iris, as well as phylogenetic comparative methods and binary character evolution model to identify its connections with the fusion of life and the contrast in brightness between the eye and the eye ring. It was revealed that the veined pattern is an ancestral condition for geckos and is present in most modern species. Most precisely, the evolution of the vein pattern is described by all rates different...
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Influence of the different light sources of the vehicle headlights on the perception of an obstacle by the driver of the vehicle
Sklenář, Michal ; Bradáč, Albert (referee) ; Motl, Jakub (advisor)
This thesis focuses on examining the influence of various light sources (halogen, xenon, LED) of vehicle headlights (Škoda Octavia III. generation) on the perception of pedestrians by the driver of the vehicle. The theoretical part contains the concepts essential for a general understanding of the main topic of this thesis. The aim of the thesis is to present how the brightness and contrast between the pedestrian and his surroundings changes when illuminated by one of these light sources due to the increasing distance between the pedestrian and the vehicle and the different type of pedestrian clothing. The results of the measured experiment are presented using charts, photo documentation and brightness maps. These are then compared with the results obtained by measuring the distance of pedestrian perception by individual probands. The conclusions applicable to forensic engineering practice are drawn from the compared values.
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Possibilities of simulation modeling of traffic accidents with reduced visibility
Rozsíval, Jan ; Motl, Jakub (referee) ; Bradáč, Albert (advisor)
The diploma thesis deals with the possibilities of simulation modeling with reduced visibility in the Virtual CRASH program, which as the only available programs allows work both with the help of mathematical models to simulate vehicle movement and change parameters to simulate reduced visibility, lighting, etc. The theoretical part contains a description of photometric quantities, deals with the human eye and its ability to see under reduced visibility, a description of the luxmeter meter and luminance analyzers. Here are four main reasons for reduced visibility and their description. It contains a sample of the most used programs used to deal with traffic accidents. The four types of headlights most commonly used in today's vehicles are listed and described. In the experimental part, two measurements were performed. The first measurement to obtain input values to obtain a black and white texture determining the shape of the light rays emanating from the vehicle headlights. The second experiment to obtain the contrasts of the white box, black box and pedestrian for subsequent comparison with the output of the Virtual CRASH program.
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