KMITL

Permanent URI for this communityhttps://dspace.kmitl.ac.th/handle/123456789/1

Browse

Settings

Has files: NoSubject: search.filters.subject.Digital Watermarking

Search Results

Now showing 1 - 4 of 4
  • Loading...
    Thumbnail Image
    Some of the metrics are blocked by your 
    consent settings
    Item type:Publication,
    Medical image encryption based on DCT-DWT domain combining 2D-DataMatrix Barcode
    (2016-02-04)
    Nambutdee, Amarit
    ;
    Airphaiboon, Surapan
    In this paper, an application for medical image encryption and watermarking to store patient information is proposed. By using scrambling algorithm, the 1<sup>st</sup> view patient information is hidden and require unique patient password to access a real image. For watermarking scene, a Discrete Cosine Transform (DCT) and Discrete Wavelet Transform (DWT) are applied to non-overlapping block size 8x8 image pixels. Later, a DWT and DCT coefficient value are compared in each block for position identification of embed message in medical image. To improve high capacity and imperceptibility in watermarking step, a Two Dimension Barcode ECC200 standard is used to convert message before embed to cover image. Experimental results demonstrate that the proposed scheme achieves better performance of imperceptibility.
  • Loading...
    Thumbnail Image
    Some of the metrics are blocked by your 
    consent settings
    Item type:Publication,
    Image watermarking using joined wavelet and time domain
    (2014-10-14)
    Padungdit, Akarapol
    ;
    Suggree, Sippawit
    ;
    Tuwanut, Panwit
    This paper presents Image Watermarking Using Joined Wavelet and Time Domain. This method proposed has advantages above a single domain watermarking which are time domain or frequency domain. The advantages are that the output watermarked image is more robust and the result watermark after attacked from both geometric attacks and frequency attacks is better than the single watermarking method.
  • Loading...
    Thumbnail Image
    Some of the metrics are blocked by your 
    consent settings
    Item type:Publication,
    Wavelet-based watermarking of multispectral images
    (2003-12-01)
    Ladthawanidphan, Mana
    ;
    Rangsanseri, Yuttapong
    In this paper, we propose a digital watermarking technique for remote sensing multispectral images. The watermark is added to the multispectral image through the Karhunen Loève Transform. A multi-stage discrete wavelet transform is applied to the most principal component image and a pseudo-random sequence with a normal distribution is embedded to all high frequency coefficients at above a level adaptive threshold. The experimental result shows that the embedded watermark is robust against various signal processing and compression attack.
  • Loading...
    Thumbnail Image
    Some of the metrics are blocked by your 
    consent settings
    Item type:Publication,
    Hiding confidential signature into digital images via frequency domain
    (2001-12-01)
    Thitimajshima, Punya
    ;
    Thitimajshima, Yutthapong
    ;
    Rangsanseri, Yuttapong
    In this paper, we describe a technique for hiding a confidential signature into digital image, or referred as digital watermarking. The embedded signature, or watermark, is usually a recognizable pattern like a logo of a company. Our technique is applied to the frequency domain of the image, obtained by two dimensional Fourier transform. The watermark is embedded into the magnitude coefficients. This technique does not require original image to recover the embedded signature.