Now showing items 1-8 of 8

    • Adaptive methods for dithering color images 

      Akarun, L.; Yardımcı, Y.; Çetin, A. E. (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 ...
    • Flame detection in video using hidden Markov models 

      Töreyin, B. Uğur; Dedeoğlu, Yiğithan; Çetin, Ahmet Enis (IEEE, 2005)
      This paper proposes a novel method to detect flames in video by processing the data generated by an ordinary camera monitoring a scene. In addition to ordinary motion and color clues, flame flicker process is also detected ...
    • A histogram-based approach for object-based query-by-shape-and-color in image and video databases 

      Şaykol, E.; Güdükbay U.; Ulusoy, Ö. (Elsevier, 2005)
      Considering the fact that querying by low-level object features is essential in image and video data, an efficient approach for querying and retrieval by shape and color is proposed. The approach employs three specialized ...
    • Person search made easy 

      İkizler, Nazlı; Duygulu, Pınar (Springer, Berlin, Heidelberg, 2005)
      In this study, we present a method to extensively reduce the number of retrieved images and increase the retrieval performance for the person queries on the broadcast news videos. A multi-modal approach which integrates ...
    • QR-RLS algorithm for error diffusion of color images 

      Unal, G. B.; Yardimci, Y.; Arikan, O.; Çetin, A. E. (SPIE, 2000)
      Printing color images on color printers and displaying them on computer monitors requires a significant reduction of physically distinct colors, which causes degradation in image quality. An efficient method to improve the ...
    • Real-time smoke and flame detection in video 

      Töreyin, B. Uğur; Dedeoğlu, Yiğithan; Çetin, Ahmet Enis (IEEE, 2005)
      A novel method to detect smoke and/or flame by processing the video data generated by an ordinary camera monitoring a scene is proposed. It is assumed the camera is stationary. Since the smoke is semi-transparent, edges ...
    • Superior warm-White light-emitting diodes integrated with quantum dot nanophosphors for high luminous efficacy and color rendering 

      Nizamoğlu, Sedat; Erdem, Talha; Sun, X. W.; Demir, Hilmi Volkan (Optical Society of America, 2011)
      Quantum dot nanophoshor hybridized warm-white LEDs are reported to exhibit high photometric performance of luminous efficacy exceeding 350 lm/Wopt and color rendering index close to 90 at correlated color temperatures <3000 ...
    • Wavelet based detection of moving tree branches and leaves in video 

      Töreyin, B. Uğur; Çetin, A. Enis (IEEE, 2006-05)
      A method for detection of tree branches and leaves in video is proposed. It is observed that the motion vectors of tree branches and leaves exhibit random motion. On the other hand regular motion of green colored objects ...