Statistical analysis of local 3D structure in 2D images

Kalkan, Sinan
Wörgötter, Florentin
Krüger, Norbert
For the analysis of images, a deeper understanding of their intrinsic structure is required. This has been obtained for 2D images by means of statistical analysis [15, 18]. Here, we analyze the relation between local image structures (i.e., homogeneous, edge-like, corner-like or texture-like structures) and the underlying local 3D structure, represented in terms of continuous surfaces and different kinds of 3D discontinuities, using 3D range data with the true color information. We find that homogeneous image patches correspond to continuous surfaces, and discontinuities are mainly formed by edge-like or comer-like structures. The results are discussed with regard to existing and potential computer vision applications and the assumptions made by these applications. © 2006 IEEE.
2006 IEEE Computer Society Conference on Computer Vision and Pattern Recognition, CVPR 2006


Contrast Enhancement of Microscopy Images Using Image Phase Information
Çakır, Serhat; Atalay, Rengül; ÇETİN, AHMET ENİS (2018-01-01)
Contrast enhancement is an important preprocessing step for the analysis of microscopy images. The main aim of contrast enhancement techniques is to increase the visibility of the cell structures and organelles by modifying the spatial characteristics of the image. In this paper, phase information-based contrast enhancement framework is proposed to overcome the limitations of existing image enhancement techniques. Inspired by the groundbreaking design of the phase contrast microscopy (PCM), the proposed ima...
Shape : representation, description, similarity and recognition
Arıca, Nafiz; Yarman Vural, Fatoş Tunay; Department of Computer Engineering (2003)
In this thesis, we study the shape analysis problem and propose new methods for shape description, similarity and recognition. Firstly, we introduce a new shape descriptor in a two-step method. In the first step, the 2-D shape information is mapped into a set of 1-D functions. The mapping is based on the beams, which are originated from a boundary point, connecting that point with the rest of the points on the boundary. At each point, the angle between a pair of beams is taken as a random variable to define...
Optimum design of feed structures for high G/T passive and active antenna arrays
Demir, S; Toker, Canan (1999-03-01)
In this work, noise analysis of parallel feed structures is presented. Signal and noise behavior of the feed structures are signified by the newly introduced concepts of "coherent' and "incoherent" impedance match of power-combining structures. It is also shown that a feed structure can be redesigned for low-noise operation without affecting the radiation characteristics. Optimum design of parallel feed structures for low-noise operation is explained, Also an optimum use of active elements in such structure...
Nonlinear image restoration
Ungan, Cahit Uğur; Demirbaş, Kerim; Department of Electrical and Electronics Engineering (2005)
This thesis analyzes the process of deblurring of degraded images generated by space-variant nonlinear image systems with Gaussian observation noise. The restoration of blurred images is performed by using two methods; a modified version of the Optimum Decoding Based Smoothing Algorithm and the Bootstrap Filter Algorithm which is a version of Particle Filtering methods. A computer software called MATLAB is used for performing the simulations of image estimation. The results of some simulations for various o...
Comparison of whole scene image caption models
Görgülü, Tuğrul; Ulusoy, İlkay; Department of Electrical and Electronics Engineering (2021-2-10)
Image captioning is one of the most challenging processes in deep learning area which automatically describes the content of an image by using words and grammar. In recent years, studies are published constantly to improve the quality of this task. However, a detailed comparison of all possible approaches has not been done yet and we cannot know comparative performances of the proposed solutions in the literature. Thus, this thesis aims to redress this problem by making a comparative analysis among six diff...
Citation Formats
S. Kalkan, F. Wörgötter, and N. Krüger, “Statistical analysis of local 3D structure in 2D images,” New York, Amerika Birleşik Devletleri, 2006, vol. 1, Accessed: 00, 2022. [Online]. Available: