Image encryption based on elliptic curve cryptosystem and reducing its complexity is still being actively researched. Generating matrix for algorithm secret key together with Hilbert will be involved in this study. For a first case we need not to compute the inverse decryption processing cause that generated step was self invertible matrix. While second case, computing required. Peak signal noi...

In this paper, we propose a new robust hybrid watermarking technique based on recently introduced contourlet transform and singular value decomposition. After applying the contourlet transform for the original image, we select the low frequency directional sub band coefficients and apply singular value decomposition. The singular values of the original image are then modified by the singular va...

-This paper proposes a novel image watermarking method in discrete wavelet transform domain using support vector machines. Reference and watermark images are used to modify the coefficients of the particular even and odd blocks of the wavelet transformed image. Good learning ability of SVMs are used to extract the watermark from the watermarked image even after several different image processin...

Ultrasound imaging is one of the most widely used and important diagnostic tools in today's sophisticated medical diagnostics [1]. Ultrasound imaging is becoming more popular day by day because it is relatively inexpensive and portable, especially when compared with other imaging techniques such as MRI and computed tomography (CT), PET [2], [3]. It has no known long-term side effects and rarely...

In remote-sensing image processing, fusion (pan-sharpening) is a process of merging high-resolution panchromatic and lower resolution multispectral (MS) imagery to create a single high-resolution color image. Many methods exist to produce data fusion results with the best possible spatial and spectral characteristics, and a number have been commercially implemented. However, the pan-sharpening ...

In this paper, a copyright protection method for digital image with 1/T rate forward error correction (FEC) is proposed. In the proposed method, the original image is lossless and the watermark is robust to malicious attacks including geometric attacks such as scaling, rotation, cropping, print-photocopy-scan, and scaling-cropping attacks and nongeometric attacks such as low-pass filtering, sha...

Triggered by the spread of digital aerial image acquisition, the quantification and improvement of spatial image resolution has become a topic of considerable interest for photogrammetric processing. Within our paper, the determination of image resolution based on the Rayleigh criterion and the point spread function will be discussed. These techniques then can be applied in order to exactly eva...

Numerous satellites collect imagery of the Earth’s surface daily, providing information to public and private sectors. The fusion (pan-sharpening) high-resolution panchromatic satellite with lower-resolution multispectral has shown promise for monitoring natural resources farming areas. It results in new more detail than original or images. In agricultural areas Mississippi, landscapes can rang...

Given an elliptic curve E over a number field k, the Galois action on the torsion points of E induces a Galois representation, ρE : Gal(k/k) → GL2(b Z). For a fixed number field k, we describe the image of ρE for a “random” elliptic curve E over k. In particular, if k 6= Q is linearly disjoint from the cyclotomic extension of Q, then ρE will be surjective for “most” elliptic curves over k.