These characteristics can widen DCT applications relevant to image compression, image retrieving, pattern recognition, etc. We then present an image coder utilizing these characteristics by morphological representation of DCT coefficients (MRDCT). The experiments show that MRDCT is among the state-of-...
Recovering unknown, missing, damaged, distorted, or lost information in DCT coefficients is a common task in multiple applications of digital image processing , including image compression , selective image encryption , and image communication. This paper investigates the recovery of sign bits in DCT ...
How a Laplacian distribution of the coefficients can be derived by using a doubly stochastic model; Difference in the width of the Laplacian distributions across various DCT coefficients; How certain changes in the image statistics could affect the DCT coefficient distributions....
Over the past two decades, there have been various studies on the distributions of the DCT coefficients for images. However, they have concentrated only on fitting the empirical data from some standard pictures with a variety of well-known statistical distributions, and then comparing their goodness...
An approach is based on the block discrete cosine transform (DCT). The novelty of this approach is that the transform coefficients of all image blocks are coded and transmitted in absolute magnitude order. The resulting ordered-by-magnitude transmission is accomplished without sacrificing coding effici...
Retraint, Detection of Jsteg algorithm using hypothesis testing theory and a statistical model with nuisance parameters [C], in 2nd ACM workshop on Information hiding and multimedia security (IH&MMSEC), 2014, 3-13. [6] F. Muller, Distribution shape of two-dimensional dct coefficients of ...
Maloo, "Image Retrieval Using Fractional Coefficients of Transformed Image Using DCT and Walsh Transform", International Journal of Engineering Science and Technology, Vol. 2, No. 4, 2010, pp. 362-371.Dr. H.B.Kekre, Sudeep D. Thepade and Akshay Maloo ,Image Retrieval using Fractional ...
Image and Video Encryption based on Dual Space-Filling Curves The core idea behind the proposed schemes is to decompose an image/video first by the FrWT followed by the shuffling of each sub-band coefficients by ... G Bhatnagar,QMJ Wu,B Raman - Oxford University Press 被引量: 17发表: 20...
DC coefficients were analogized afterDCTtransformation, and they were considered to be appropriate embedded places. 首先分析DCT变换后直流系数的特点并确定嵌入位置,然后提出一类根据水印信息量化DCT直流 系数嵌入水印的算法. 互联网 In order to eliminate float operation in point DSP, pointDCTis replaced by ...
DCT of fused image is represented as DF=DoF,D1F,D2F…..DP−1F and obtained by fusing the DCT coefficients of images A and B. The steps involved in the algorithm are as below. (10)f(x,y)=2N∑v=0N−1∑u=0N−1c(u)(v)F(u,v)cos[(2x+1)uπ2N]×cos[(2y+1)...