Matting using a known background and a chroma-key minimization scheme

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...

Extraction of biological parameters of wound-healing processes from time-lapse videos

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...

Camera Positioning and Vision-based Fall Detection

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...

Analysis of Microscopic Images: A Gradient Vector Flow Based Approach

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....

Zesje: Web-based paper exam grading system

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...

Improving the creation process of catoptric anamorphosis using a reference pattern

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...

Smart sensors and communication using IoT in supermarkets: Shelf monitor system

This thesis tries to find a solution for the problem of managing and monitoring the banana shelf in a supermarket using IoT.<br/>The research focuses on using a wireless sensor that detects some features of the banana shelf while being non-intrusive.<br/>The three main features that are examined of the shelf are the quality and quantity of the...