Interactive classification of satellite image content based on query by example

Dalay, Oral
In our attempt to construct a semantic filter for satellite image content, we have built a software that allows user to indicate a few number of image regions that contains a specific geographical object, such as, a bridge, and to retrieve similar objects on the same satellite image. We are particularly interested in performing a data analysis approach based on user interaction. User can guide the classification procedure by interaction and visual observation of the results. We have applied a two step procedure for this and preliminary results show that we eliminate many true negatives while keeping most of the true positives.


Evaluating public transporation alternatives in the METU Campus with the aid of gis
Güllüoğlu, Naim Cem; Işık, Oğuz; Department of Geodetic and Geographical Information Technologies (2005)
Geographical Information Systems (GIS) have been rapidly developed in the fields that need spatial data and transportation planning is one of these fields. Since transportation data is spatially distributed and need spatial, statistical and network based analysis; GIS applications have contributions to transportation planning. In this study, it is aimed to determine a new public transportation mode and route in the METU campus with the aid of GIS by considering the stations of Çayyolu metro route. Besides, ...
Image Chain Simulation for Earth Observation Satellites
Alici, Kamil B.; Öktem, Sevinç Figen; Karci, Ozgur; Yilmaz, A. Serdar; Selimoglu, Ozgur (Institute of Electrical and Electronics Engineers (IEEE), 2019-10-01)
We present a general-purpose end-to-end image chain simulation (ICS) that enables to assess the image quality of a satellite imager for Earth observations. The image chain consists of four main components: radiometry, atmosphere, optics, and detector. In particular, ICS first computes the input radiance from the reflectance values of a high-resolution input, and then calculates the image radiance by using the optical transfer function (OTF) of the overall system. This OTF contains all the distortion effects...
Time-based workflow mining
Cantürk, Deniz; Çiçekli, Fehime Nihan; Department of Computer Engineering (2005)
Contemporary workflow management systems are driven by explicit process models, i.e., a completely specified workflow design is required in order to enact a given workflow process. Creating a workflow design is a complicated time-consuming process and typically there are discrepancies between the actual workflow processes and the processes as perceived by the management. Therefore, new techniques for discovering workflow models have been required. Starting point for such techniques are so-called أworkflow l...
ONDER, M; Kuzuoğlu, Mustafa (Institution of Engineering and Technology (IET), 1992-10-01)
An optimisation approach is presented for the problem of reconstructing the permittivity and conductivity profiles of a dielectric slab from the reflected and transmitted field data. The problem is treated as an optimal control problem where the norm of the difference of measured and calculated boundary data is minimised subject to the state equation governing the system. The original constrained optimisation problem is reduced to the evaluation of stationary points of an augmented functional which is obtai...
Design of a multi-layer beam-steering WLAN antenna
Yilmaz, Kardelen; Nesimoglu, Tayfun (2018-11-02)
This paper represents the design of a microstrip patch antenna which is reconfigurable by means of the effect of a pixel grid overlay that is placed at a certain distance from the antenna. hi addition to beam steering capability, this article will focus on several important parameters of the aforementioned antenna, such as, the directivity, the gain, radiation pattern and polarization. The antenna consists three main parts; a rectangular microstrip patch antenna that has the operating frequency at around 2....
Citation Formats
O. Dalay, “Interactive classification of satellite image content based on query by example,” M.S. - Master of Science, Middle East Technical University, 2005.