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Image Retrieval Based on Color Histograms
Sailer, Zbyněk ; Hradiš, Michal (referee) ; Beran, Vítězslav (advisor)
This thesis deals with description of existing methods of image retrieval. It contains set of methods for image description, coding of global and local descriptor (SIFT, etc.) and describes method of effective searching in multidimensional space (LSH). It continues with proposal and testing of three global descriptors using color histograms, histogram of gradients and the combination of both. The last part deals with similar image retrieval using proposed descriptors and the indexing method LSH and compares the results with the existing method. Product of this work is an experimental application which demonstrates the proposed solution.
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Graphical modular LED display
Šutera, Libor ; Fiedler, Petr (referee) ; Bradáč, Zdeněk (advisor)
Project describing general setup and properties of mikroprocessors from series 8051 and properties of components, that are use in project. Next part describing process of construction and software equipment of mikroprocessor. The main direction of project is make a suggestion about driving of matrix with 8x8 RGB LED diode. Suggested mudular LED display complete with components and aktivate matrix. In last part write program for mikroprocessor for driving LED matrix a will be communicate with PC. And last write programe, which show accuracy of function.
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Using the camera sensor in the measuring technique
Srba, Tomáš ; Čejka, Miloslav (referee) ; Bejček, Ludvík (advisor)
This bachelor thesis describes using of the Checkers in measuring technology, for control and picture comparing with picture reference by pixel match. Is describe part of machine vision as branch of industry automation. The bachelor thesis content summarized and described the basic methods, for image processing, function CCD and CMOS sensors, there are introduced standards of color signal encoding. Project this bachelor thesis is parameter checking of the checker. Special part of this work is description of working station for demonstration parameters checking of the checker. Program documentation of the Checker 101/E101 from COGNEX helps with design step by step.
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An application for color coordinate transforms and color mixing
Jurzykowski, Michal ; Štukavec, Radim (referee) ; Slanina, Martin (advisor)
The most important human sense is sight. We can see thanks to eyes, which are very sensitive on small part of electromagnetic wave. White sunlight contents all the spectrum visible. By decomposition of white sunlight we get colour spectrum. We recognize colours by cones, which are sensitive on red, green and blue spectrum of white light. Informer times it was denited many colour models, which have been using additive and subtractive method od mixing colours. One of the first models which were matemacily defined was CIE 1931, also known as XYZ. Together with this model was created xy chromatic diagram for displaying of colour space. Best known colour models are RGB and CMY. In TV technics is used model YUV. Models HSV and HSL are more intuitiv. This models have three basic parameters: hue, saturation and brightness.
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Image Compression Using Wavelets
Mokrejš, Jiří ; Kyselý, František (referee) ; Říha, Kamil (advisor)
This bachelor´s thesis describes issues of wavelet compression, which is today already in common use mainly at work with digital photographs or other pictures. Saving of space regarding sizes of files is the main reason of that. There are main image formats and types of compression suitable for editing pictures desribed in this thesis. In case of lossy image compression, distortion occurs and blocking artefacts can be created. It is unwanted effect that´s why it is neccesary to use suitable data stream, compression´s rate or coding type. So the focus is on discrete wavelet transform, which uses so-called wavelets and the Haar´s wavelet is the best known of all. Next chapter of this work explores colour spaces, in which can be a picture displayed. In case of coding and encoding it is model RGB and YCbCr. Not least there is mentioned term of picture decomposition. It is possible to demonstrate mentioned functions on created java aplication, which is part of this bachelor´s thesis.
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Traffic lanes and interruptions detection
Dojava, Marian ; Červinka, Luděk (referee) ; Horák, Karel (advisor)
This master´s thesis deals with depiction aplication of camera like sensitive element for assisting system of car. It was proposed, how find a road, a lane and a obstacle on roadways. Only one camera was aplication for it. Solution is realized by methods, that are based on color and gradient of image. It applies simple methods and methods with mathematical model. Result is sum of method and its test and comparing. Realization of my program is present at resume of this thesis.
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Software for data hiding in image files
Morkus, Filip ; Říha, Kamil (referee) ; Burda, Karel (advisor)
In my master's thesis I start fromthedescriptionofthebasics and thebeginningsofsteganography, itsmethods and purposes. Detaileddescriptionof BMP fileswithhidden data follows. A filestructureisanalysedintothesmallestdetails to avoiddamagingfilewhilehiding. At thesametime to make profit oftheinformationincluded in a fileheader in the most effectiveway. Anotheraimwas to explain a principalofsteganographicalmethoditself, usedforhiding data into BMP file. Based on these findings, a programmeconceptwasdesigned and consequentlythatprogrammewas made. Itcarriesoutthehiding and revealing data intothe image files. Directionsfor use are made to thisprogramme and thereisalso a demo ofthefeaturesdescribingeach step. At the end ofmymaster's thesis anattentionispaid to thoseinfluencesthatcanbelimitingforthismethod. Exceeding these limitswouldlead to breakingthesteganographicalmethod, whichmeansrevealingthehidden data.
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Deinterlacing in uncompressed digital video sequences
Meňhart, Pavel ; Kratochvíl, Tomáš (referee) ; Slanina, Martin (advisor)
Interlacing is the process of frame scanning and frame displaying being based on the even and uneven lines‘ interchanging. This framework originated along with the PAL and NTSC television standards‘ formation in the course of 1930s. The process mentioned above stopped frames displayed on older TV sets from flashing. Nevertheless, there is a disadvantage of the frame processed after this manner, consisting in its attribute to be displayed in a clean-cut way just on classical TV sets. However, plasma and LCD television appliances, projectors and computer monitors always display the entire frame all at once, therefore composing it of the both fields, yet not being acquired concurrently, differing in moving objects‘ positions, moreover their contours are doubled, frayed and unfocussed. This master´s thesis deals with fundamentals of the interlaced video signal‘s formation, problems coming about at featuring the interlaced video like this, followed by operating methods of deinterlacing itself. In conclusion, there are my own softwares presented, having been developed in MATLAB computer environment and software command language C, and implementing some of the operating methods designed for deinterlacing in uncompressed digital video sequences.
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