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Ampérmetr s velkým rozlišením
Honek, Marek ; Roubal, Zdeněk (oponent) ; Steinbauer, Miloslav (vedoucí práce)
Transmisní elektronový mikroskop je zařízení pracující na podobném principu jako optický mikroskop. Pro dosažení obrovských zvětšení využívá faktu, že elektrony mají mnohem kratší vlnovou délku než fotony. Pro zaostření světla se používají skleněné čočky, které jsou v elektronovém mikroskopu nahrazeny cívkami generujícími magnetické pole. To je přímo úměrné velikosti proudu, který těmito cívkami prochází. Pro dosažení vysokého rozlišení je nezbytné, aby proud dodávaný do cívek byl co možná nejstabilnější. Tato práce rozebírá metody měření proudu a snaží se o návrh zařízení pro měření stability proudu s rozlišením 1 ppm.
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Generation of Synthetic Retinal Images with High Resolution
Aubrecht, Tomáš ; Heidari, Mona (oponent) ; Drahanský, Martin (vedoucí práce)
Special equipment, a fundus camera, is needed to capture the retina, which is the most important part of the human eye. Therefore, the main objective of this work is to design and implement a system that would be able to generate retinal images. The proposed solution uses an image-to-image translation, where the system is provided with a black and white image at the input containing only bloodstream, on the basis of which a color image of the entire retina is generated. The system consists of two neural networks: a generator, which generates retinal images, and a discriminator, which classifies these images as real or synthetic. Training of this system was performed on 141 images from publicly available databases. A new database was created with more than 2,800 images of healthy retinas in a resolution of 1024x1024. This database could be used as a learning tool for ophthalmologists or for the development of various applications working with retinas.
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Development of high resolution RGB camera
Madeja, Jiří ; Kováč, Michal (oponent) ; Kubíček, Michal (vedoucí práce)
This thesis deals with a selection of a suitable image sensor for an application in a high resolution plant scanning camera and a design of a suitable electronic circuit for connecting the selected sensor (SONY IMX253) with the Avnet MicroZed development board. The thesis discusses various image sensor parameters relevant to the selection of the suitable image sensor. The example of a process of the suitable image sensor selection is demonstrated and the selected sensor parameters are analyzed in detail. The circuit design and printed circuit board design problematics of high-speed circuits and sensitive and specific components such as the image sensor are indicated. A configuration and programming of the Xilinx Zynq SoC is outlined and eventually, a simple theoretical verification of designed module is executed.
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Generation of Synthetic Retinal Images with High Resolution
Aubrecht, Tomáš ; Heidari, Mona (oponent) ; Drahanský, Martin (vedoucí práce)
Special equipment, a fundus camera, is needed to capture the retina, which is the most important part of the human eye. Therefore, the main objective of this work is to design and implement a system that would be able to generate retinal images. The proposed solution uses an image-to-image translation, where the system is provided with a black and white image at the input containing only bloodstream, on the basis of which a color image of the entire retina is generated. The system consists of two neural networks: a generator, which generates retinal images, and a discriminator, which classifies these images as real or synthetic. Training of this system was performed on 141 images from publicly available databases. A new database was created with more than 2,800 images of healthy retinas in a resolution of 1024x1024. This database could be used as a learning tool for ophthalmologists or for the development of various applications working with retinas.
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Ampérmetr s velkým rozlišením
Honek, Marek ; Roubal, Zdeněk (oponent) ; Steinbauer, Miloslav (vedoucí práce)
Transmisní elektronový mikroskop je zařízení pracující na podobném principu jako optický mikroskop. Pro dosažení obrovských zvětšení využívá faktu, že elektrony mají mnohem kratší vlnovou délku než fotony. Pro zaostření světla se používají skleněné čočky, které jsou v elektronovém mikroskopu nahrazeny cívkami generujícími magnetické pole. To je přímo úměrné velikosti proudu, který těmito cívkami prochází. Pro dosažení vysokého rozlišení je nezbytné, aby proud dodávaný do cívek byl co možná nejstabilnější. Tato práce rozebírá metody měření proudu a snaží se o návrh zařízení pro měření stability proudu s rozlišením 1 ppm.
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Development of high resolution RGB camera
Madeja, Jiří ; Kováč, Michal (oponent) ; Kubíček, Michal (vedoucí práce)
This thesis deals with a selection of a suitable image sensor for an application in a high resolution plant scanning camera and a design of a suitable electronic circuit for connecting the selected sensor (SONY IMX253) with the Avnet MicroZed development board. The thesis discusses various image sensor parameters relevant to the selection of the suitable image sensor. The example of a process of the suitable image sensor selection is demonstrated and the selected sensor parameters are analyzed in detail. The circuit design and printed circuit board design problematics of high-speed circuits and sensitive and specific components such as the image sensor are indicated. A configuration and programming of the Xilinx Zynq SoC is outlined and eventually, a simple theoretical verification of designed module is executed.
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