Searched for: subject%3A%22process%22
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Banţă, Diana (author), Kho, Sydney (author), Lantink, Anna (author), Marin, Alexandru (author), Petkov, Vladimir (author)
Watermarks are historical motifs present in the texture of paper that are commonly used to identify the paper manufacturers. They only become visible when viewed under certain light conditions. Under ideal circumstances, researchers may use watermarks to determine a historical document’s origins and context. To identify a watermark, it is...
student report 2023
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Simonov, Alex (author)
In this paper, we investigate the problem of segmenting the foreground objects from the known background. The target application is a setting where a large display serves as the backdrop for a scene. The method proposed in this paper solves this problem in two steps. We try to separate the foreground and the background with the modified...
bachelor thesis 2021
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Fritz, Arnout (author)
With the ever-increasing demand for a more efficient production process, the thickness of silicon wafers for the solar cell industry has shown a decreasing trend over the years. This makes the substrates more and more fragile, with an increasing breakage rate as a result. Research at the TU Delft has been done on contactless handling, using air...
master thesis 2021
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Bhatnagar, Prernna (author)
Magnetic Resonance Imaging is a popular modality for brain imaging in present times. The quality of the images depends on the strength of the magnetic field. An MRI scanner with a magnetic field strength of 3 Tesla(T) is pre-dominantly used for clinical purposes. However, with the advancement in technology, and the need to image finer image...
master thesis 2020
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Monreal Madrigal, Alejandro (author)
Magnetic Resonance Imaging is one of the most widely used imaging modalities nowadays and it performs especially well imaging human organs such as the brain and liver. One of its main limitations is the relatively long imaging times, to overcome this issue and speed up the data acquisition, several techniques such as Parallel Imaging or PI have...
master thesis 2020
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Boel, F.D.E.M. (author)
<b>Introduction</b> The objective of this research is to assess whether there is a correlation between quantitatively assessed ablation margins and the occurrence of local tumor progression (LTP) using dedicated image processing software.<br/><b>Methods</b> 28 patients with 45 de novo HCCs treated with percutaneous thermal ablation, e.g....
master thesis 2020
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Bhardwaj, Shikhar (author)
Advancements in the semiconductor manufacturing processes, particularly photo-lithography, contribute to the sustainability goals of the modern society by enabling production of cheaper, more efficient computer chips. This thesis work focused on improvements to a technique called immersion lithography that uses a confined pool of liquid as the...
master thesis 2020
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Jujjavarapu, Satyajith (author)
Schistosomiasis is a neglected tropical disease (NTD) that affects around a quarter-billion people worldwide. Most of the infected people live in tropical regions, especially in sub-Saharan Africa, where there is limited access to diagnostic and other relevant medical facilities. The current reference standard diagnostic procedure - conventional...
master thesis 2020
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Rajwade, Rajesh (author)
Magnetic Resonance Imaging is a widely used technique to obtain images of the interior of the human body for diagnosis and treatment. MRI machines capture the raw signal in spatial frequency domain i.e. k-space and the image is obtained via Fourier transform. The Cartesian acquisition is one of the most commonly used acquisition patterns in MRI...
master thesis 2019
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Tsang, Daniel (author)
Experimental data have been extracted from wound-healing time-lapse videos. These data include the detection of the area of the wound and the detection of individual cells. Extracting the area of the wound is done by using a function in Python OpenCV called cv2.findcontours. An improved method to extract the area of the wound is introduced as...
bachelor thesis 2019
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Cromjongh, Robin (author), Seijs, Arjan (author), Nelissen, Ivo (author), van der Sar, Jerom (author)
Elderly care residences often have falling incidents, sometimes with dire consequences. This project aims to implement a method for detecting when people fall, an issue that has seen much research and practical implementations already. In contrast to other work, this project aims to create a non-intrusive, non-wearable solution through the use...
bachelor thesis 2019
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Christodoulou, Antria (author)
In this thesis, an image-based method is proposed for solving the relative translation errors of 3D point clouds collected by Mobile Laser Scanning (MLS) techniques. The process of matching 3D point clouds is known as registration. Due to environment-depending limitations of the positioning component of MLS systems, when recording a certain...
master thesis 2018
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Boumans, Thijs (author)
Image colourization is the task of providing colour to grayscale images or videos. Image colourization can be valuable to the entertainment industry and of cultural interest. Current methods colourize images by either providing an interface for easier colourization by a person or by using an automatic method which nowadays are often driven by a...
master thesis 2018
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den Bakker, Duncan (author)
The theory of active contours is applied to microscopic images of cells. A model is developed that approximates cell borders by dynamic curves. This model is based on gradient vector flow (GVF), an external force that acts on the contours. Both active contours and the GVF force field are defined as functions that minimize certain functionals....
bachelor thesis 2018
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Cleintuar, Nick (author), van der Krieken, Justin (author), Mahabier, Jamy (author)
Grading can be a very time-consuming activity for teachers. For this reason, numerous tools exist to aid teachers in grading. One of these tools is Zesje, a web application that allows electronic grading of paper-based exams. A major drawback of Zesje was that teachers were required to create their exams with LaTeX, a popular document...
bachelor thesis 2018
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van Velthoven, Quint (author)
Catoptric anamorphosis is an image which seems to be distorted, but looks normal when observed from a specific point of view and indirectly via a reflective object. While some methods already exist that can create such images, they are limited in the amount of differently shaped reflective objects they support or they require you to obtain a 3D...
bachelor thesis 2018
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Slooter, Rutger (author)
In this research project we investigate a variety of different approaches. A key element in our endeavour is the localising of points of interest (POI’s). These POI’s are the approximate centre points of the cells, the corners or vertices of the cells, and also the cell walls in given directions. Using these POI’s we have built some intuitive...
master thesis 2018
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Lu, Yun (author)
In this work, a possible solution to allow for scalable MATLAB deployment on big data clusters through Spark without using the official MATLAB toolbox is introduced. Other possible solutions that can be used for accelerating existing MATLAB code including calling modules written by Graphics Processing Unit (GPU) and Python Pool with...
master thesis 2018
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Hilmarsson, Saevar (author)
Image processing is found in many fields and in many domains. Advances in<br/>digital image capturing technology allows for faster video rates, of higher quality, than has been seen before and that trend continues. With greater resolution and increased data flow there is also a need for faster and better hardware for image processing. As the...
master thesis 2018
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Bhosale, Parag (author)
Currently, non-rigid image registration algorithms are too time intensive to use in time-critical applications. To solve this problem, stochastic gradient descent (SGD) has been implemented in image registration. But, SGD depends on manual step size selection which is dicult and time consuming. To avoid such manual selection, SGD has been...
master thesis 2017
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