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Author: search.filters.author.Phromlikhit, Chanchai

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    Tablet counting machine base on image processing
    (2012-12-01)
    Phromlikhit, Chanchai
    ;
    Cheevasuvit, Fusak
    ;
    Yimman, Surapan
    This paper proposes Tablet counter machine base on image processing. A digital webcam creates an image of drug being dispensed. This image is displayed in standard MGB model. The original image will change to grayscale image. Then grayscale image will filtered for noise using a median filter and then using threshold we obtain a digital binary image of the pill being dispensed. The image is further processed using erosion and dilation. The actual number of drug in the image is determine by applying connected component labeling and centroid process. Our experiment used 6 mm. to 12 mm. samples with accurate results. ©2012 IEEE.
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    Novel amplitude compensation for digital signal processing system using minimum phase filter
    (2011-12-01)
    Praesomboon, Sukanya
    ;
    Dejhan, Kobchai
    ;
    Yimman, Surapun
    ;
    Phromlikhit, Chanchai
    This paper proposes minimum phase filter design and applications. The property of a minimum phase filter is having the poles and zeros inside the unit circle. The initial step is to design a minimum phase filter to obtain the specified analog of the reconstruction low pass filter, convert to digital filter using the approximate of derivative and inverse system and next the system of minimum phase filter could be implemented by output function software of digital signal processing system. The experimental result of this proposed method can also be used to compensate for attenuation of the output amplitude obtained from the reconstruction filter at high frequency of digital signal processing system. © 2011 IEEE.