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Motion Detection in Video
Polanský, Petr ; Sochor, Jakub (referee) ; Herout, Adam (advisor)
The objective of this work is evaluate motion detection using Gaussian Mixture Model. When algorithm detects motion, it creates short video capturing this motion and visualizing it properly. Visualization is made by white pixels intensity graph. System is applicable on less busy area when motion is more noticeable. Results of this work shows how surrounding environment and camera position influence detection.
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Eye-blink detection
Jeništa, Petr ; Atassi, Hicham (referee) ; Vlach, Jan (advisor)
The merits of my Bachelor's Thesis is description of the theoretical principles of methods which are used for eye-blink detection. This work discribes methods for location of human face in a frame with the comlex background. The next principes of the work are different manners how we can find eyes in the frame and its sequential tracking. The last part is the eye analysis and the evaluation whether blinking went ahead or not.There are describes different intermedia which is used for processing of the numerical frame. At the close of the work is described the practical realization of some mentioned methods, thus the realization of algorithm which detects blinking eyes pair.
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Influence of the time interval from the radiopharmaceutical administration on the bone / background activity ratio in the bone scintigraphy
ZAHOŘOVÁ, Tereza
Influence of the time interval from the application of radiopharmaceutical on the activity ratio of bone/backround during the skeletal scintigraphy. The presented thesis aims to demonstrate the effect of the selected time interval from the application of radiopharmaceutical until the start of whole body skeletal scintigraphy on the quality of examination of patients at the department of nuclear medicine at the Clinic of imaging methods in FN Pilsen. The ratio between the background and bone activity of patients will vary with the length of the interval between the application of radiopharmaceuticals and the beginning of imaging. We expect that with prolonging of the time interval the ratio between the background and bone activity will increase, which means a higher quality of your imaging in practise. The hypothesis of this thesis expects a differentiation of ratio between the background and bone activity depending on the time of initiating whole body scintigraphy from the time of application of radiopharmaceuticals. To determine the ratio value a reference file of males aged 25-65 years (year of birth from 1951 to 1991, the year of examination from 2013 to 2016), weighing 65-95 kg was created, where scintigraphy does not show pathology in the examined area of the skeleton or in the soft tissues on the left thigh. These patients were divided into two groups according to the time intervals between the application and the beginning of the whole body skeletal scintigraphy. The first group consists of 30 patients who were examined less than 120 minutes after the application of the radiopharmaceutical. The second group consists of 30 patients who were examined more than 120 minutes after the application of the radiopharmaceutical. Using the ROI technique, values from the areas L5, right femur and soft tissue structures on the left thigh are obtained. These values are then used to calculate the time intervals on the activity ratio of bone/backround and verify the hypothesis, which assumes that the ratio values between the above mentioned groups will be different. This difference should prove that a longer time interval between the application of the radiopharmaceutical and the beginning of scintigraphy will bring a higher quality of scintigraphic imaging. This qualitative factor will be beneficial both for patients and their physicians who have to describe these scintigrams.
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Methods for Localization of Image Differences in Different Modalities of Paintings
Fürbach, Radek ; Blažek, Jan (advisor) ; Křivánek, Jaroslav (referee)
The work focuses on the analysis of paintings to determine the painting techniques. Specifically, it focuses on the localization of the underdrawing by comparing images taken in the spectra with different penetration depth. Defines the problem associated with the capture of the compared images in different spectra. Specifies methods that determine the dependence between two parts of the spectrum (mainly RGB and IR) and based on the dependence approximates conversion between these two parts of the spectrum (Red spectral component projection, Colour intensity, Weighted average of spectral components, Table conversion, Linear regression, PCA analysis and Edge decomposition). Work also describes more general problems that complicate solving tasks, such as noise, non-uniform illumination and adding the same type of radiation. Problems at work are thoroughly analyzed. We design a Calculation of illumination parameters using a neural network, Approximation of illumination by blur, Polynomial approximation of illumination and TWMJ approximation of illumination for suppressing non-uniform illumination. Define methods Estimation by edge decomposition and Local least squares method solving adding the same type of radiation. In addition, we describe the Gaussian filter, the Averaging, Median filter, Conservative...
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Motion Detection in Video
Polanský, Petr ; Sochor, Jakub (referee) ; Herout, Adam (advisor)
The objective of this work is evaluate motion detection using Gaussian Mixture Model. When algorithm detects motion, it creates short video capturing this motion and visualizing it properly. Visualization is made by white pixels intensity graph. System is applicable on less busy area when motion is more noticeable. Results of this work shows how surrounding environment and camera position influence detection.
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Eye-blink detection
Jeništa, Petr ; Atassi, Hicham (referee) ; Vlach, Jan (advisor)
The merits of my Bachelor's Thesis is description of the theoretical principles of methods which are used for eye-blink detection. This work discribes methods for location of human face in a frame with the comlex background. The next principes of the work are different manners how we can find eyes in the frame and its sequential tracking. The last part is the eye analysis and the evaluation whether blinking went ahead or not.There are describes different intermedia which is used for processing of the numerical frame. At the close of the work is described the practical realization of some mentioned methods, thus the realization of algorithm which detects blinking eyes pair.
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Computation of relative function of kydney at dynamic scintigraphy - influence of time period applied for computation.
HRTÁŇOVÁ, Jana
The topic of my bachelor thesis is a computation of relative renal function at dynamic scintigraphy and an influence of the time period applied for computation. The main aim of the thesis is to establish if the usage of two different time periods for computation of relative function of kidneys at dynamic scintigraphy of kidneys has any influence on computed function. Precisely, whether the choice of time period affects the result of processing the study is acquired by dynamic scintigraphy of kidneys. Expressed hypothesis assumes that time periods between 60s and 180s which were chosen for the calculation have not the influence on calculated relative function. Dynamic scintigraphy of kidneys enabling to display function of kidney´s ability to clean blood from the observed substance and consider possible defect of kidney excretion, it is the important method of examination mainly by children patients which are the vast majority of examined patients. For the hypothesis confirmation, there was created a reference file. This file consists of children patients who were examined by dynamic scintigraphy of kidneys in the Department of Nuclear Medicine Hospital in Czech Budejovice. With a help of program of dynamic scintigraphy the relative function of kidney was computed and defined by the percentage portion of each kidney on the whole renal function. The different time periods were used for the function curve for the computation. The function curve is designed like a graph from the marked region of interest and it is the result of computer processing data which were obtained from the scintigraphic study. From obtained values, the tested criteria are subsequently determined by statistical calculations they are confirmed and given as a zero hypothesis.
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The Sacroiliac Joint Ratio. Determination of Normal Values.
MAŘÍK, Karel
Indices SI joint. Determination of normal values. The present thesis aims to establish normal values in adults without any pathological changes in the SI joint, LS spine and pelvis who are examined at the whole-body bone scintigraphy in the Department of Nuclear Medicine Hospital in Czech Budejovice. The SI joint is examined in patients with suspected inflammation in focusing on the joint activity with the whole-body scintigraphy of the skeleton. Then, using the ROI ratio, the ratio of the activity in the SI joint activity and the sacrum or L spine is calculated. The first hypothesis assumes that people without any pathology changes of the SI joint belong to the range of 1,0?1,4. To determine the normal values, a reference file was created based on data of people whose whole body scintigram showed no pathology in the LS spine and SI joint and without any clinical suspicions of SI joint inflammation. The people selected for this research had not suffered from Bechterew?s disease, pelvic trauma and LS spine, bearing altered bone metabolism in the LS spine or pelvis. Their age at the examination time ranged from 25 to 45 years. Applying the ROI technology, values were obtained from the areas of the right and left SI joint, from the L4 and os.sakrum to verify the second hypothesis. This hypothesis assumes that in order to determinate normal values in the SI joint it is better to make a comparison using os.sakrum than L4. Applying statistical calculations, normal values of the SI joint are determined from these areas. The values will assist in the diagnosis of inflammatory diseases of spine in patients who are examined at the scintigraphy in the Department of Nuclear Medicine Hospital in Czech Budejovice.
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