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Detection of bark beetle attack of Norway spruce using spectral and biophysical data at different hierarchical levels
Vesecká, Martina ; Albrechtová, Jana (advisor) ; Tomášková, Ivana (referee)
There was created an overview of key aspects for a correct understanding of the dynamics between bark beetle and Norway spruce, especially the way of life of the beetle and the time course of its life cycles. It is absolutely essential to understand this interaction for a timely and effective solution to the bark beetle calamity. Furthermore, the mutual interaction of beetle and tree is discussed in detail in the text. Great emphasis is placed on the description of the spruce's defense mechanisms and the consequences of the attack. In particular, biophysical changes in the needles, which cause a change in the spectral behaviour of the leaves and thus the entire forest stand. Using sensor capable of measuring the reflectance of surfaces, it is possible to detect a bark beetle-infested tree much earlier than changes in the needles could be detected by the naked eye and remove it while it is still colonized by the beetle and not spreading further into surrounding trees. This is key to managing not only the current bark beetle calamity. An overview of case studies is given in the thesis, where the use of spectral methods at different hierarchical levels was applied and satisfactory accuracy in the identification of early infested trees was achieved. Key words: Norway spruce, bark beetle, bark beetle...
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Multimodal Image Processing in Art Investigation
Blažek, Jan ; Zitová, Barbara (advisor) ; Sablatnig, Robert (referee) ; Tonazzini, Anna (referee)
A B S T R A C T title: Multimodal Image Processing in Art Investigation author: Jan Blažek department: Department of Image Processing, IITA of the CAS supervisor: RNDr. Barbara Zitová PhD., Institute of Information Theory and Automation supervisor's e-mail address: zitova@utia.cas.cz abstract: Art investigation and digital image processing demar- cate an interdisciplinary field of the presented thesis. Over the past 8 years we have published thirteen papers belonging to this field of research. This thesis presents the current state of the art and puts these papers into context. Our research is focused on modalities in the visible and near-infrared parts of the spectrum and affects vari- ous tasks of art investigation. For studying the spectral response of paint materials, we suggest a low-cost mobile multi-band acquisition system and a calibration method extended by a light source with an adjustable wavelength. We created the m3art database of the spectral responses of pigments, available for comparison and public use. The central point of our research is underdrawing detection and visual- ization. For this purpose we have developed: acquisition guidelines based on optical properties of the topmost non-transparent layer, a visualization technique for comparison of modalities, and a signal separation technique...
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Multimodal Image Processing in Art Investigation
Blažek, Jan ; Zitová, Barbara (advisor)
A B S T R A C T title: Multimodal Image Processing in Art Investigation author: Jan Blažek department: Department of Image Processing, IITA of the CAS supervisor: RNDr. Barbara Zitová PhD., Institute of Information Theory and Automation supervisor's e-mail address: zitova@utia.cas.cz abstract: Art investigation and digital image processing demar- cate an interdisciplinary field of the presented thesis. Over the past 8 years we have published thirteen papers belonging to this field of research. This thesis presents the current state of the art and puts these papers into context. Our research is focused on modalities in the visible and near-infrared parts of the spectrum and affects vari- ous tasks of art investigation. For studying the spectral response of paint materials, we suggest a low-cost mobile multi-band acquisition system and a calibration method extended by a light source with an adjustable wavelength. We created the m3art database of the spectral responses of pigments, available for comparison and public use. The central point of our research is underdrawing detection and visual- ization. For this purpose we have developed: acquisition guidelines based on optical properties of the topmost non-transparent layer, a visualization technique for comparison of modalities, and a signal separation technique...
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Multimodal Image Processing in Art Investigation
Blažek, Jan ; Zitová, Barbara (advisor) ; Sablatnig, Robert (referee) ; Tonazzini, Anna (referee)
A B S T R A C T title: Multimodal Image Processing in Art Investigation author: Jan Blažek department: Department of Image Processing, IITA of the CAS supervisor: RNDr. Barbara Zitová PhD., Institute of Information Theory and Automation supervisor's e-mail address: zitova@utia.cas.cz abstract: Art investigation and digital image processing demar- cate an interdisciplinary field of the presented thesis. Over the past 8 years we have published thirteen papers belonging to this field of research. This thesis presents the current state of the art and puts these papers into context. Our research is focused on modalities in the visible and near-infrared parts of the spectrum and affects vari- ous tasks of art investigation. For studying the spectral response of paint materials, we suggest a low-cost mobile multi-band acquisition system and a calibration method extended by a light source with an adjustable wavelength. We created the m3art database of the spectral responses of pigments, available for comparison and public use. The central point of our research is underdrawing detection and visual- ization. For this purpose we have developed: acquisition guidelines based on optical properties of the topmost non-transparent layer, a visualization technique for comparison of modalities, and a signal separation technique...
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Multimodal Image Processing in Art Investigation
Blažek, Jan ; Zitová, Barbara (advisor)
A B S T R A C T title: Multimodal Image Processing in Art Investigation author: Jan Blažek department: Department of Image Processing, IITA of the CAS supervisor: RNDr. Barbara Zitová PhD., Institute of Information Theory and Automation supervisor's e-mail address: zitova@utia.cas.cz abstract: Art investigation and digital image processing demar- cate an interdisciplinary field of the presented thesis. Over the past 8 years we have published thirteen papers belonging to this field of research. This thesis presents the current state of the art and puts these papers into context. Our research is focused on modalities in the visible and near-infrared parts of the spectrum and affects vari- ous tasks of art investigation. For studying the spectral response of paint materials, we suggest a low-cost mobile multi-band acquisition system and a calibration method extended by a light source with an adjustable wavelength. We created the m3art database of the spectral responses of pigments, available for comparison and public use. The central point of our research is underdrawing detection and visual- ization. For this purpose we have developed: acquisition guidelines based on optical properties of the topmost non-transparent layer, a visualization technique for comparison of modalities, and a signal separation technique...
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