The article examines the role and place of Visegrad Group countries, as well Central European region a whole, in foreign policy planning Russia 1991–2018. Based on historical genetic method to create holistic image region’s perception, analyzes step-by-step changes that have occurred minds highest political leadership public relation it since times USSR (1968–1985, 1985–1991, 1991–1995, 1996–19...

We present a novel image sharing algorithm based on the discrete fractional random transform (DFRNT). The secret image is shared into several shadow images in the DFRNT domain together with some noise images as the encryption keys to increase the security. The decryption only requires a part of shadow images and therefore is independent of those noise images. The ðt; nÞ threshold sharing scheme...

This paper presents the first participation of the University of Ottawa group in the Photo Retrieval task at Image CLEF 2008. Our system uses Lucene for text indexing and LIRE for image indexing. We experiment with several clustering methods in order to retrieve images from diverse clusters. The clustering methods are: k-means clustering, hierarchical clustering, and our own method based on Wor...

This paper reports our multimedia information retrieval experiments carried out for the ImageCLEF track 2009. In 2008, we proposed a multimedia document model defined as a vector of textual and visual terms weighted using a tf.idf approch [5]. For our second participation, our goal was to improve this previous model in the following ways: 1) use of additional information for the textual part (l...

In this work the normalized dictionary distance (NDD) is presented and investigated. NDD is a similarity metric based on the dictionary of a sequence acquired from a data compressor. A dictionary gives significant information about the structure of the sequence it has been extracted from. We examine the performance of this new distance measure for color image retrieval tasks, by focusing on thr...

This article presents the findings of a recent study which identified the image resources that professional user groups acknowledged were useful to their work processes. The information behaviors relating to images of several professional user groups-archaeologists , architects, art historians, and artists-were examined in a qualitative research study conducted in 2008-2009. Presented here are ...

This chapter focuses on correctly recognizing faces in the presence of large illumination variation. Our aim is to do this by synthesizing an illumination normalized image using Quotient Image-based techniques (Shashua et al., 2001, Wang et al., 2004, Chen et al., 2005, Nishiyama et al., 2006, Zhang et al., 2007, and An et al., 2008). These techniques extract an illumination invariant represent...

• Comprehensive evaluation of current image descriptors for scenarios with strong illumination changes that induce complex appearance variations • Proposed Gabor-based descriptor outperforms other descriptors, especially on textureless surfaces [Ala12] Alahi, A., Ortiz, R., Vandergheynst, P.: Freak: Fast retina keypoint. In: CVPR. (2012) 510-517 [Bay08] Bay, H., Ess, A., Tuytelaars, T., Van Goo...

Spatial distributions of energy deposited by an extensive air shower in the atmosphere through ionization, as obtained from the CORSIKA simulation program, are used to find the fluorescence light distribution in the optical image of the shower. The shower image derived in this way is somewhat smaller than that obtained from the NKG lateral distribution of particles in the shower. The size of th...

This paper presents a novel perceptually based method for noise reduction of image signals characterized by low signal to noise ratios. The proposed method exploits the local phase characteristics of an image signal to perform bilateral filtering in an adaptive manner. The proposed method takes advantage of the human perception system to preserve perceptually significant signal detail while sup...