National Repository of Grey Literature 155 records found  1 - 10nextend  jump to record: Search took 0.00 seconds. 
the essence of photography in the digital age
Doubek, Zdeněk ; Holeček, Tomáš (advisor) ; Váša, Ondřej (referee)
The diploma thesis solves the question of photography not only from the point of view of a work of art, but as a part of a cultural code. Photography in the digital era has the potential to become a new kind of visual language. From this perspective, the photographic universe reveals several essential questions, which we address here. These questions explore topics such as: historical development of images and text, the difference between traditional images and technical images, the cultural impact of mass production of digital devices and photographs, the essence of photography as a symbol from the point of view of semiotics and logic, the difficulties of deciphering photography, the linguistic aspects of digital photography or the meaning of photography in virtual (public) space. Due to the nature of the monitored topics, the work will address problems mainly related to language, logic, epistemology, human freedom in the context of man/device and marginally also semiotics.
Ischemic thrombus analysis in multiphasic brain stroke CT data
Mikešová, Tereza ; Holeček, Tomáš (referee) ; Jakubíček, Roman (advisor)
This master thesis deals with analysis of ischemic thrombus in brain CT scans. In theoretical part, a review of methods, especially thrombus segmentation, is developed. Furthermore, the anatomy of cerebral arteries and acute ischemic stroke is summarized. Selected methods from the field of image processing are briefly described. The practical part results in a comparison of thrombus segmentation methods. The segmentation itself was preceded by data preprocessing, which is described in the theses, and the creation of a manual annotation database. The best implemented method was found to be the adaptive thresholding method, which achieved a Dice score of 0,4555. By combining the methods appropriately, a final Dice score of 0,5145 was achieved. Thrombus parameters were then calculated from the segmented volumes. The median intensity value was 51,55~HU, the median length was 15,16 mm, and the median volume was determined to be 65,34 mm3. Subsequent correlation analysis showed no significant relationship between the derived parameters.

National Repository of Grey Literature : 155 records found   1 - 10nextend  jump to record:
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11 HOLEČEK, Tomáš
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