Browsing by Subject "binaryzacja lokalna"

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Access status: Open Access ,
Implementacja zaawansowanych algorytmów przetwarzania, analizy i szyfrowania obrazów w układach reprogramowalnych
(Data obrony: 2013-03-08) Kryjak, Tomasz
Wydział Elektrotechniki, Automatyki, Informatyki i Inżynierii Biomedycznej
The thesis presents a range of advanced hardware modules to realize image processing, analysis and encryption implemented in reprogrammable FPGA device. Encryption with the block cipher Clefia and colour image filtering with the PGF (Peer Group Filtering) algorithm were proposed. In both cases, it was the first implementation of the method in FPGA. Local thresholding described in a high level synthesis language Mitron-C was also presented. In the following part of the thesis, research results on background generation and moving object detection were described. As the basis the multivariant clustering algorithm was used. Several improvements were introduced among others: the use of the CIE Lab colour space and an additional segmentation using textural information. Finally, three modules useful in automated video surveillance systems, which are based on background generation, were implemented. These includes intrusion into protected zone detection, camera tampering detection and head and shoulders detection using LBP descriptor and SVM. All proposed modules allow processing of the video stream with a resolution of at least 640 x 480 and a frequency of 60 frames per second in real time. The research results were published in several scientific journals and conference proceedings.