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    Image encryption based on phase encoding by means of a fringe pattern and computational algorithms Autoría: Muñoz Rodríguez, J. A., Rodríguez Vera, R.

    Pubblicazione 2006
    Fuente: Universidad Nacional Autónoma de México
    Tipo de material: Artículo de Investigación
    Descripción: Resumen: A computational technique for image encryption and decryption is presented. The technique is based on light reflection, intensity superposition and computational algorithms. The image to be encrypted is a reflectance map obtained by means of the light reflected by a scene. To perform the encryption procedure, the image is encoded in a computer-generated fringe pattern. The model of the fringe pattern is a cosine function, which adds to its argument the image to be encrypted as a phase. It generates a fringe pattern deformed according to the image. To complete the encryption, a random mask is superimposed on the fringe pattern. The decryption procedure is performed by subtracting the random mask from the encrypted image and applying a phase recovery method. To retrieve the phase from the fringe pattern, the heterodyne demodulation method is used. To describe the accuracy of results of the decrypted images and the robustness of the encryption, a root mean square of error is calculated. All steps of the encryption and decryption are performed in computational form. The results of encryption and decryption are thus improved. It represents a contribution to the field of encryption and decryption. This technique is tested with simulated images and real images, and its results are presented.
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    High-Speed Decoding of the Binary Golay Code Autoría: Lee, H. P., Chang, C. H., Chu, S. I.

    Pubblicazione 2013
    Fuente: Universidad Nacional Autónoma de México
    Tipo de material: Artículo de Investigación
    Descripción: Resumen: Recently, some table-lookup decoding algorithms (TLDAs) have been used to correct the binary Golay code. Thispaper proposes an efficient high-speed TLDA called message-syndrome decoding algorithm (MSDA) by using themessage syndrome to correct the binary systematic Golay code. The proposed MSDA is based on the novelmessage-syndrome lookup table (MSLT). The MSLT merely consists of 12 candidate syndromes and its memory sizeis significantly smaller than other existing lookup tables. Computer software simulation results show that the decodingspeed of the proposed MSDA is superior to other proposed TLDAs.
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    An optimal algorithm for estimating angular speed using incremental encoders Autoría: José Danilo Rairán Antolines

    Pubblicazione 2013
    Fuente: Redalyc
    Tipo de material: Artículo científico
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    A Cryptosystem Based Upon Sums of Key Functions Autoría: Vyacheslav V. Kalashnikov

    Pubblicazione 2017
    Fuente: Redalyc
    Tipo de material: Artículo científico
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    Decoding the algorithmic operations of Australia's National Disability Insurance Scheme Autoría: Georgia van Toorn, Terry Carney

    Pubblicazione 2024
    Fuente: Wiley Open Access
    Tipo de material: Artículo Open Access
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