In this paper, a novel image-encryption edge based Image steganography technique is proposed. The proposed algorithm uses logistic map for encrypting the information prior to transmission. Laplacian of Gaussian (LoG) edge operator is used to find edge areas of the colored-cover-image. Simulation ...
The original image Convolved by a Laplacian of Gaussian filter is translated to a binary or ternary image according to threshold,in which the algorithm uses the SUSAN detector to detect corners. 新算子首先使用拉普拉斯-高斯核对图像进行卷积,并将图像转换为二值或三值图像,然后使用SUSAN算子检测角点。
aDanach trat er in die revolution. 它之后跨步入革命。[translate] aThis machine can produce a big volume of wind with the double-bubble genertor,can send large amount of colorful bubbles into air,instantly taking you into a warm and romantic atmosphere.Rcmote-control available. 这个机器生产风的...
Centro de Investigación Operativa, Universidad Miguel Hernández de Elche, Avenida de la Universidad s/n, 03202, Elche, Spain José Valero Corresponding author Correspondence to Tomás Caraballo. Ethics declarations Conflict of interest The authors declare no potential conflict of interest. Additional info...
Pan-sharpening methods often use the ℓ2-norm to en- force spatial resolution, or switch to ℓ1 when sparsity is de- sired. When used to penalize image gradients, it has been shown that according to empirical image statistics, such Gaussian (ℓ2) or Laplacian (ℓ1) assumptions are...
represents the difference between two Gaussian-like or related functi ons convol ved wi th the ori gi nal i mage. The difference between these two functions is similar to the "Lapl aci an" operators commonl y used in image enhancement [13]. Thus, ...
Defini tion 1.1 [5] A function ϕ ∈ C 1 (X, R) satisfies the Palais- Smale condition (PS) if for every sequence {un } in X, {ϕ(un )} is bounded and ϕ � (un ) → 0 as n →∞, contains a convergent subsequence. ∗ Sp on sored by th e key NSF of Edu...
Lavialle et al. (2007) introduce a nonlinear filtering technique based on the definition of a partial differential equation that de-noises and preserves faults before automatic fault extraction. In his work, Barnes (2006) suggests using precomputed coherence data to define potential fault anomalies....
We analyze a particular filter which has these properties, called the normalized Laplacian of Gaussian filter. Section 2 gives motivation and a mathematical description of the filter. The filter is described in a continuous variable setting. For discrete images viewed continuously as piecewise constant...
To extract the edges of an object, binarization with a Laplacian filter or a Laplacian– Gaussian filter has been widely used. Such a method has problems, however: for example, the extraction of noise rather than the real edges of an object; failure to extract parts of a visually noticeable...