Now showing items 1-11 of 11

    • Adaptive methods for dithering color images 

      Akarun, L.; Yardımcı, Y.; Çetin, A. Enis (Institute of Electrical and Electronics Engineers, 1997-07)
      Most color image printing and display devices do not have the capability of reproducing true color images. A common remedy is the use of dithering techniques that take advantage of the lower sensitivity of the eye to spatial ...
    • Adaptive methods for dithering color images 

      Akarun, L.; Yardımcı, Y.; Çetin, A. Enis (SPIE Optical Engineering Press, 1995)
    • Detection of empty hazelnuts from fully developed nuts by impact acoustics 

      Onaran, İbrahim; Dülek, Berkan; Pearson, T. C.; Yardımcı, Y.; Çetin, A. Enis (IEEE, 2005)
      Shell-kernel weight ratio is the main determinate of quality and price of hazelnuts. Empty hazelnuts and nuts containing undeveloped kernels may also contain mycotoxin producing molds, which can cause cancer. A prototype ...
    • Detection of microcalcifications in mammograms using higher order statistics 

      Gürcan, M. N.; Yardımcı, Y.; Çetin, A. Enis; Ansari, R. (Institute of Electrical and Electronics Engineers, 1997-08)
      A new method for detecting microcalcifications in mammograms is described. In this method, the mammogram image is first processed by a subband decomposition filterbank. The bandpass subimage is divided into overlapping ...
    • E-museum: web-based tour and information system for museums 

      Baştanlar, Y.; Altıngövde, İsmail Şenol; Aksay, A.; Alav, O.; Çavuş, Özge; Yardımcı, Y.; Ulusoy, Ozgur; Güdükbay, Uğur; Çetin, A. Enis; Akar, G. B.; Aksoy, Selim (IEEE, 2006)
      A web-based system - consisting of data entrance, access and retrieval modules - is constructed for museums. Internet users that visit the e-museum, are able to view the written and visual information belonging to the ...
    • Equiripple FIR filter design by the FFT algorithm 

      Çetin, A. Enis; Gerek, Ö. N.; Yardımcı, Y. (Institute of Electrical and Electronics Engineers, 1997-03)
      The fast Fourier transform (FFT) algorithm has been used in a variety of applications in signal and image processing. In this article, a simple procedure for designing finite-extent impulse response (FIR) discrete-time ...
    • Influence function based Gaussianity tests for detection of microcalcifications in mammogram images 

      Gürcan, M. Nafi; Yardımcı, Y.; Çetin, A. Enis (IEEE, 1999-10)
      In this paper, computer-aided diagnosis of microcalcifications in mammogram images is considered. Microcalcification clusters are an early sign of breast cancer. Microcalcifications appear as single bright spots in mammogram ...
    • Robust direction-of-arrival estimation in non-Gaussian noise 

      Yardımcı, Y.; Çetin, A. Enis; Cadzow, J. A. (Institute of Electrical and Electronics Engineers, 1998-05)
      In this correspondence, a nonlinearly weighted least-squares method is developed for robust modeling of sensor array data. Weighting functions for various observation noise scenarios are determined using maximum likelihood ...
    • Small moving object detection in video sequences 

      Zaibi, Rabi; Çetin, A. Enis; Yardımcı, Y. (IEEE, 2000-06)
      In this paper, we propose a method for detection of small moving objects in video. We first eliminate the camera motion using motion compensation. We then use an adaptive predictor to estimate the current pixel using ...
    • Small moving object detection using adaptive subband decomposition and fractional lower order statistics in video sequences 

      Bağci, A.Murat; Yardımcı, Y.; Çetin, A. Enis (2001-07-08)
      In this paper, a small moving object method detection method in video sequences is described. In the first step, the camera motion is eliminated using motion compensation. An adaptive subband decomposition structure is ...
    • Subband analysis for robust speech recognition in the presence of car noise 

      Çetin, A. Enis; Yardımcı, Y.; Erzin, Engin (IEEE, 1995-05)
      In this paper, a new set of speech feature representations for robust speech recognition in the presence of car noise are proposed. These parameters are based on subband analysis of the speech signal. Line Spectral Frequency ...