needed to support a wide range of multimedia applications. [10] 2. (a) Why is file or data compression necessary for Multimedia activities? [2] (b) Briefly explain how the Discrete Cosine Transform Operates‚ and why is it so important in data compression in Multimedia applications [10] (c) A Simple Transform Encoding procedure maybe described by the following steps for a 2x2 block of monochrome pixels: 1. Take top left pixel as the base value for the block‚ pixel A. 2. Calculate three other
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References: [1] J.W. Cooley‚ J.W. Tukey‚ An algorithm for the machine calculation of complex Fourier series‚ Math. Comput. 19 (1965) 297–301. [2] P. Cull‚ J.L. Holloway‚ Computing Fibonacci numbers quickly‚ Inform. Process. Lett. 32 (1989) 143–149. [3] M.C. Er‚ Computing sums of order-k Fibonacci numbers in log time‚ Inform. Process. Lett. 17 (1983)
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MECG signals. I. I NTRODUCTION According to the published literature‚ majority of the signal denoising methods in the Wavelet domain are based on soft and hard thresholding. The noisy signal is decomposed up to a suitable level‚ j‚ using Discrete Wavelet Transform (DWT) and based on noise variance Wavelet coefficients are thresholded √ at t = σ 2 log N (where t is threshold‚ σ is variance of noise and N is the numbers of samples) [1]‚ [2]. It is
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COMPS412F Tutorial 8 Activities Objective: The objective of this activity is to make use of JPEGImageEncoder and JPEGImageDecoder from com.sun.image.codec.jpeg.* to perform JPEG compression and to study how the compressed image quality is related to the amount of compression. Description: [pic] The image on the left is the original Lenna image. The scrollbar controls the quality factor of JPEGImageEncoder. The image on the right is the compressed image. The compressed image suffers a
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and detect a specific characteristic of ECG such as QRS complex [3]. Rapid examples of morphological methods are Wavelet Transform (WT) and Complex Wavelet Transform which do not need to be trained [4–7]. In this letter‚ Complex Morlet Wavelet (CMW) and Complex Frequency B-Spline Wavelet (CFBSW) are designed and linearly combined together to acquire a more efficient transform named‚ Hybrid Complex Wavelet (HCW). This novel wavelet can overcome the deficit of CMW in not detecting all the available
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INFORMATICA‚ 2004‚ Vol. 15‚ No. 1‚ 127–142 2004 Institute of Mathematics and Informatics‚ Vilnius 127 High Capacity Data Hiding in JPEG-Compressed Images Hsien-Wen TSENG‚ Chin-Chen CHANG Department of Computer Science and Information Engineering National Chung Cheng University Chaiyi‚ Taiwan 621‚ R.O.C. e-mail: {hwtseng‚ccc}@cs.ccu.edu.tw Received: March 2003 Abstract. The JPEG image is the most popular file format in relation to digital images. However‚ up to the present time‚ there seems
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computer science‚ pp.310-232‚ 2003. [9]J [10]JozsefLenti‚“StegnographicMethods”‚PeriodicaPolytechnica4‚ pp.249–258‚ 2000. [11] Kristy Westphal “Stegnography Revealed”‚ Security focus‚pp.2-28‚ 2003-04-0 [12] K [13] M.Madavi‚ S.Samavi‚ V.Sabeti‚ “Transform domain steganography using random blocking for uncompressed images”‚ 4th Iranian Society of Cryptology Conference‚ pp.292-295‚ 2007. [14] M [15] NeilF.Johnson‚ “Stegnography” Technical report IEEE Computer‚ pp.26-34‚ 1995. [16] N.Provos‚ “Defending
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David Kennedy CHE 235 Lab 10/30/14 Scale-up Synthesis and Characterization of Butyl 2-Cyano-3-(3‚5-dichloro-phenyl)-2-propenoate‚ TSE Project #131 Introduction: This report describes the steps taken to create the scale-up of targeted trisubstituted ethylene‚ Butyl 2-Cyano-3-(3‚5-dichloro-phenyl)-2-propenoate compound (#131)‚ and also the characterization methods deployed to the results. This report serves as a critical step in the overall objective of the project; the synthesis of the copolymer
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ELE374 Fourier Analysis and Synthesis of Waveforms. By Anthony Njuguna EE08U122 – 080947424 Anthony Njuguna ee08u122 Abstract Many applications in communication and systems are concerned with propagation of signals through networks. The resultant output signal is dependent on the properties of both the input signal and the processes acting on the signal. This is a laboratory Report will be focusing on using Fourier series to analyze waveforms and the synthesis of waveforms. The report highlights
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Pulse Fourier Transform Microwave (CP-FTMW) Spectrometer Abstract: Under the condition in which electric and magnetic fields are absent‚ rotational constants is a three molecular constants that substantiate polyatomic molecule. In this laboratory experiment at Missouri University of Science and Technology‚ we are going to collect rotational spectra by using 2 separate types of microwave spectrometers -- the FTMW (Fourier Transform Microwave) spectrometer and CP-FTMW (Chirped Pulse Fourier Transform
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