Now showing items 1-12 of 12

    • Classification of closed and open shell pistachio nuts using principal component analysis of impact acoustics 

      Çetin, A. Enis; Pearson, T. C.; Tewfik, A. H. (IEEE, 2004-05)
      An algorithm was developed to separate pistachio nuts with closed-shells from those with open-shells. It was observed that upon impact on a steel plate, nuts with closed-shells emit different sounds than nuts with open-shells. ...
    • Classification of closed-and open-shell pistachio nuts using voice-recognition technology 

      Çetin, A. Enis; Pearson, T. C.; Tewfik, A. H. (American Society of Agricultural and Biological Engineers, 2004)
      An algorithm using speech recognition technology was developed to distinguish pistachio nuts with closed shells from those with open shells. It was observed that upon impact with a steel plate, nuts with closed shells emit ...
    • Detection of insect damaged wheat kernels by impact acoustics 

      Pearson, T. C.; Çetin, A. Enis; Tewfik, A. H. (IEEE, 2005-03)
      Insect damaged wheat kernels (IDK) are characterized by a small hole bored into the kernel by insect larvae. This damage decreases flour quality as insect proteins interfere with the bread-making biochemistry and insect ...
    • Discrimination between closed-and open-shell (Turkish) pistachio nuts using undecimated wavelet packet transform 

      Ince, N. F.; Goksu, F.; Tewfik, A. H.; Onaran, I.; Çetin, A. Enis; Pearson, T. C. (American Society of Agricultural and Biological Engineers, 2008)
      Due to low consumer acceptance and the possibility of immature kernels, closed-shell pistachio nuts should be separated from open-shell nuts before reaching the consumer. A system using impact acoustics as a means of ...
    • Feasibility of impact-acoustic emissions for detection of damaged wheat kernels 

      Pearson, T.; Çetin, A. Enis; Tewfik, A. H.; Haff, R. P. (Elsevier BV, 2007-05)
      A non-destructive, real time device was developed to detect insect damage, sprout damage, and scab damage in kernels of wheat. Kernels are impacted onto a steel plate and the resulting acoustic signal analyzed to detect ...
    • Identification of damaged wheat kernels and cracked-shell hazelnuts with impact acoustics time-frequency patterns 

      Ince, N. F.; Onaran, I.; Pearson, T.; Tewfik, A. H.; Çetin, A. Enis; Kalkan, H.; Yardimci, Y. (American Society of Agricultural and Biological Engineers, 2008)
      A new adaptive time-frequency (t-f) analysis and classification procedure is applied to impact acoustic signals for detecting hazelnuts with cracked shells and three types of damaged wheat kernels. Kernels were dropped ...
    • An overview of signal processing for food inspection 

      Pearson, T.; Çetin, A. Enis; Tewfik, A. H.; Gokmen, V. (Institute of Electrical and Electronics Engineers, 2007-05)
      The goal of this article is to introduce the signal processing community to the challenges that arise in food inspection. We briefly describe both traditional food-inspection technologies, which rely on sample collection ...
    • Subband domain coding of binary textual images for document archiving 

      Gerek, Ö. N.; Çetin, A. Enis; Tewfik, A. H.; Atalay, V. (Institute of Electrical and Electronics Engineers, 1999-10)
      In this work, a subband domain textual image compression method is developed. The document image is first decomposed into subimages using binary subband decompositions. Next, the character locations in the subbands and the ...
    • Subset selection with structured dictionaries in classification 

      İnce, N. F.; Göksu, F.; Tewfik, A. H.; Onaran, İbrahim; Çetin, A. Enis (EURASIP, 2007)
      This paper describes a new approach for the selection of discriminant time-frequency features for classification. Unlike previous approaches that use the individual discrimination power of expansion coefficients, the ...
    • The Topkapi Palace Museum 

      Çetin, A. Enis; Gerek, O. N.; Tewfik, A. H. (Wiley-Blackwell Publishing Ltd., 2000)
      A city‐like ensemble overlooking the Marmara Sea and the Bosphorus, Istanbul’s legendary Topkapi Palace became a synonym for Ottoman history and the heart of a far‐flung empire for 400 years. Transformed into a museum, it ...
    • Wavelet domain textual coding of Ottoman script images 

      Gerek, Ömer. N.; Çetin, A. Enis; Tewfik, A. H. (SPIE, 1996-03)
      Image coding using wavelet transform, DCT, and similar transform techniques is well established. On the other hand, these coding methods neither take into account the special characteristics of the images in a database nor ...
    • Wheat and hazelnut inspection with impact acoustics time-frequency patterns 

      İnce, N. F.; Onaran, İbrahim; Tewfik, A. H.; Kalkan, H.; Pearson, T.; Çetin, A. Enis; Yardimci, Y. (ASABE, 2007-06)
      Kernel damage caused by insects and fungi is one of the most common reason for poor flour quality. Cracked hazelnut shells are prone to infection by cancer producing mold. We propose a new adaptive time-frequency classification ...