content based retrieval and analysis of breast masses
Bản chất của hình ảnh y sinh học (Phần 11)
Ngày tải lên :
27/05/2016, 15:50
... semantic, or diagnostic content of the entity The measure of entropy is based upon the probabilities of occurrence of the various symbols involved in the representation of a message or image: ... Biomedical Image Analysis Accumulation of probabilities (Prob.) of occurrence of gray levels in the derivation of the Hu man code for the image in Figure 11.2 The probabilities of occurrence of the symbols ... Section 2.8 Despite the mathematical and theoretical powers of measures such as entropy, the standpoint of viewing an image as being composed of discrete and independent symbols (numerical values)...
- 134
- 281
- 0
Báo cáo hóa học: " Research Article Multiresolution Source/Filter Model for Low Bitrate Coding of Spot Microphone Signals" pot
Ngày tải lên :
22/06/2014, 00:20
... desired and in any order preferred We tested different types of filterbanks (3 waveletbased and MDCT -based) , namely, 8-band with filters db40 (ABX-1 test) and db4 (ABX-2), 2-band with db40 (ABX3) and ... AR analysis analysis Figure 2: Diagram of the proposed encoding approach Each of the microphone signals of the multimicrophone recording is processed by an analysis filterbank Each of the subband ... obtained from the subband analysis by upsampling and filtering the subband correlations, as explained in [22] It is of interest to note that for equal LP order, the fullband and subband LP result in...
- 16
- 269
- 0
Báo cáo hóa học: " Research Article Identification of Sparse Audio Tampering Using Distributed Source Coding and Compressive Sensing Techniques" docx
Ngày tải lên :
22/06/2014, 00:20
... bitstream of a number of quantized random projections of the original image; the content user (CU) computes its own random projections on the received (and possibly tampered) image, and uses them ... levels of sparsity (k/n = 0.15 and k/n = 0.25) as a function of the number of projections m and of the quantization distortion of the measurements (SNRy ) We observe a graceful improvement of the ... explained in Section 6, and the accuracy of the tampering estimation; a larger number of bitplanes J and of measurements m correspond to a higher quality of tampering estimation, and at the same time...
- 12
- 189
- 0
Báo cáo hóa học: " Research Article Distributed Source Coding Techniques for Lossless Compression of Hyperspectral Images" pdf
Ngày tải lên :
22/06/2014, 23:20
... information Y Let us call μxu and μxl the average values of the blocks above and on the left of the current block, and μ yu and μ yl the corresponding values in the previous band By assuming that the ... define a set of predictors Pl Indeed, a larger number of predictors is built by perturbing the estimated values of μx and those of the border pixels by adding a number of multiples of a given ... Member of the Data Archiving and Distribution (DAD) Technical Committee of the IEEE Geoscience and Remote Sensing Society, of the Multimedia Systems and Applications (MSA) Technical Committee of...
- 13
- 263
- 0
Báo cáo hóa học: " Research Article Combined Source-Channel Coding of Images under Power and Bandwidth Constraints" pot
Ngày tải lên :
22/06/2014, 23:20
... octaveband filter banks for subband/wavelet decomposition of the input image and takes advantage of the fact that the variance of the coefficients decreases from the lowest to the highest bands in ... point of the bitstream and still produce a decoded image of commensurate quality EZW and SPIHT have led to the development of the new JPEG2000 image compression standard Since both SPIHT and JPEG2000 ... he joined the Faculty of the University of Hawaii, Honolulu, as an Assistant Professor of electrical engineering He was promoted to Associate Professor in 1999 and to Professor in 2004 His research...
- 9
- 274
- 1
A SOURCE BOOK OF AUSTRALIAN HISTORY COMPILED pptx
Ngày tải lên :
06/03/2014, 03:21
... part of it that we saw is all low even land, with sandy banks against the sea, only the points are rocky, and so are some of the islands in this bay The land is of a dry sandy soil, destitute of ... short and curled, like that of the negroes, and not long and lank like the common Indian The colour of the skin, both of their faces and the rest of their body, is coal black, like that of the ... Jacobz in command of our pinnace manned with musketeers and rowers, all of them furnished with pikes and side arms together with the cockboat of the Zeehaen, with one of her second mates and six musketeers...
- 228
- 277
- 0
Source Identification of Volatile Organic Compounds in Houston, Texas pdf
Ngày tải lên :
22/03/2014, 14:20
... where di and si are the values of wind direction and wind speed of sample i The ranges of wind direction and wind speed are divided into a series of subranges having similar numbers of samples ... concentration of compound j in the emission of source p, and the strength of source p on sample i (16, 19) In this section, wind direction and wind speed will be used to illustrate the construction of the ... (the number of sources) elements T(ti,p) represents the action of temperature ti for source p The task of solving this expanded PMF model is to determine the values of F, G, D, S, W, and T to fit...
- 10
- 602
- 0
Source investigation of a small event using empirical Green’s functions and simulated annealing ppt
Ngày tải lên :
23/03/2014, 13:20
... selected couple of events was required, in order to eliminate saturated traces and to check the similarity of the waveforms and the focal mechanisms of the two events The number of event candidates ... area on the fault This gives us values of the average total slip of between 0.1 and cm and a stress drop of between I and 10 bar for a rise time equal to At, and a stress drop that can reach 30 ... faulting and the geomorphological development of the gulf of Corinth (Greece): the Corinth earthquakes of February and March 1981, Earth planet Sci Leti 57, 371 -397 Kanamori, 11 & Anderson D.L...
- 13
- 486
- 0
Báo cáo sinh học: " Research Article Adaptive Long-Term Coding of LSF Parameters Trajectories for Large-Delay/Very- to Ultra-Low Bit-Rate Speech Coding" pdf
Ngày tải lên :
21/06/2014, 16:20
... if at least 25% of the analysis frame was part of a voiced phoneme region Otherwise, it was classified as an unvoiced LSF vector Eight sentences of each of 176 speakers (half male and half female) ... 600 400 200 10 15 Size of LSF sequences 20 25 (b) Figure 2: Histograms of the size of the speech sections of the training (black) and test (white) corpus, for the voiced (a) and unvoiced (b) sections ... in Figures and for the voiced sections, and in Figures and for the unvoiced sections Let us begin the analysis of the results with the voiced sections Figure displays the results of the LT coding...
- 13
- 292
- 0
Báo cáo hóa học: " Research Article Three-Dimensional SPIHT Coding of Volume Images with Random Access and Resolution Scalability" doc
Ngày tải lên :
22/06/2014, 00:20
... different parts of the image, enabling the possibility of high-quality region of interest (ROI) and the possibility of discarding unused portions of the image An unused portion of the image could ... codestream and includes all headers and required side information This rate is given in terms of bits per pixel per band (bpppb), where band means spectral band for hyperspectral data and axial ... reading the minimum amount of bits spectral dimensions independently and random access decoding These properties are important to ease of access and processing of the data and were not introduced...
- 13
- 300
- 0
Báo cáo hóa học: " Research Article Multichannel Coding of Applause Signals Gerard Hotho, Steven van de Par, and Jeroen Breebaart" doc
Ngày tải lên :
22/06/2014, 19:20
... earlier versions of the manuscript REFERENCES [1] K Brandenburg, G Stoll, Y.-F Dehery, J D Johnston, L Kerkhof, and E F Schroder, “ISO-MPEG-1 audio: a generic standard for coding of high-quality ... number of input channels, M refers to the number of down-mix channels and the second N refers to the number of output channels Let xm , with ≤ m ≤ M, denote the discrete time domain waveform of the ... combinations of the down-mix signals and decorrelated signals derived thereof, which solves for Problems (I) and (IV) Finally, by keeping matrix U sparse, we tackle the up-mix part of Problem (III)...
- 9
- 261
- 0
Báo cáo hóa học: " Research Article Perceptual Coding of Audio Signals Using Adaptive Time-Frequency Transform" pot
Ngày tải lên :
22/06/2014, 19:20
... three (A, B, C) stimuli, and compare A with B and A with C After each comparison of A with B, and A with C, they grade the quality of the B and C The 2nd, 4th, and 6th columns of Table show the compression ... duration segments of the signal for both the channels The proposed coder is based on an adaptive signal transformation technique, that is, the content of the signal and the dictionary of basis functions ... 10000 Number of TF functions (a) (b) Figure 3: Energy cutoff of a sample signal (au:arbitrary units) information about the occurrences of each of the TF functions in time and frequency of the signal...
- 14
- 221
- 0
Báo cáo hóa học: " Review Article An Overview on Wavelets in Source Coding, Communications, and Networks" doc
Ngày tải lên :
22/06/2014, 19:20
... dimension of the image dataset, producing a number of subbands The decomposition procedure can be repeated recursively on one or more of the subbands to yield multiple levels of decomposition of lower ... although coding extensions of Part [19] of the standard permit a greater variety of transforms 2.1.2 Coding procedures Many wavelet -based coders for 2D and 3D images are based on the following observations ... a tandem communication scheme However, Shannon’s separation theorem, and thus tandem communication, is valid only for blocks of source and channel symbols sufficiently long and for encoders and...
- 27
- 262
- 0
Báo cáo hóa học: " Research Article Low-Complexity Multiple Description Coding of Video Based on 3D Block Transforms" ppt
Ngày tải lên :
22/06/2014, 22:20
... description consists of the shaper and half of the transform volumes of the residual sequence Andrey Norkin et al DC 16 t 8 16 8 reconstruction As the residual sequence has only half of the coefficient ... probability of receiving at least one description Recently, a great number of multiple description (MD) video coders have appeared, most of them based on MC prediction However, MC -based MD video ... the content of the dashed rectangle is removed First, the DC coefficient prediction errors and the AC coefficients undergo zero run-length (RL) encoding It combines runs of successive zeros and the...
- 11
- 242
- 0
Báo cáo hóa học: " Research Article JPEG2000 Compatible Lossless Coding of Floating-Point Data" pot
Ngày tải lên :
22/06/2014, 22:20
... addition of an EL and AO pass every z-bit planes, and the tracking of two significance variables (α and β) instead of just one (σ) The other change required is an integer wavelet transform that can handle ... wavelet transformed and untransformed floating-point data The coding of untransformed data has precedent in the original JPEG2000 standard in places: (1) the coding of the LL band of the wavelet transformed ... possible through the codeblock structure of the coding algorithm and allows for random spatial access to and partial decompression of only selected portions of the data This ability would be especially...
- 8
- 202
- 0
Báo cáo hóa học: " Distributed Coding of Highly Correlated Image Sequences with Motion-Compensated Temporal Wavelets" potx
Ngày tải lên :
22/06/2014, 23:20
... between the level of temporal decorrelation and the efficiency of multiview side information A similar tradeoff is found between the level of accurate motion compensation and the efficiency of multiview ... invited paper [24] E H Adelson and J R Bergen, “The plenoptic function and the elements of early vision,” in Computational Models of Visual Processing, M Landy and J A Movshon, Eds., pp 3–20, ... viewpoints of a dynamic scene The dynamic scene is represented by the image sequences sk [x, y] and wk [x, y] The coding scheme comprises of Encoder and Encoder that operate independently as well as of...
- 10
- 253
- 0
Báo cáo hóa học: " Multiple Description Wavelet Coding of Layered Video Using Optimal Redundancy Allocation" pot
Ngày tải lên :
22/06/2014, 23:20
... research projects in the areas of image/video communication, pattern recognition, multimedia security, and content- based indexing and retrieval He is a Member of the IEEE and the British Machine Vision ... of L∩ for L + will be smaller than that for L (the previous value of L∩ ) Hence, the search is performed over L2 − L1 + possible values of L∗ and L1 possible values of L∗ and the complexity of ... number of intervals of the form [r1 , r2 ] is always finite (with an upper bound equal to the number of bits in the compressed bitstream) Obviously, the measure of a union of a finite number of disjoint...
- 19
- 138
- 0
Báo cáo hóa học: " Frequency-Domain Blind Source Separation of Many Speech Signals Using Near-Field and Far-Field Models" docx
Ngày tải lên :
22/06/2014, 23:20
... component analysis (ICA) He serves as an Associate Editor of the IEEE Transactions on Audio, Speech, and Language Processing He is a Senior Member of the IEEE, and a Member of the Institute of Electronics, ... Saruwatari, and K Shikano, “High-fidelity blind separation of acoustic signals using SIMO-model -based independent component analysis, ” IEICE Transactions on Fundamentals of Electronics, Communications and ... Ogawa, H Asoh, and N Kitawaki, “Combined approach of array processing and independent component analysis for blind separation of acoustic signals,” IEEE Transactions on Speech and Audio Processing,...
- 13
- 294
- 0
Báo cáo hóa học: "Research Article MAP-Based Underdetermined Blind Source Separation of Convolutive Mixtures by " ppt
Ngày tải lên :
22/06/2014, 23:20
... changed from the sum of the absolute values of real numbers to the sum of the -norms of the real and imaginary parts The introduction of the -norm explains the different behavior of complex-valued ... component analysis (ICA) He serves as an Associate Editor of the IEEE Transactions on Audio, Speech and Language Processing He is a Senior Member of the IEEE, and a Member of the Institute of Electronics, ... source separation of speech signals 12 Walter Kellermann is a Professor for communications at the Chair of Multimedia Communications and Signal Processing of the University of Erlangen-Nuremberg,...
- 12
- 242
- 0
Báo cáo hóa học: " Sparse Spectrotemporal Coding of Sounds" potx
Ngày tải lên :
23/06/2014, 01:20
... tiling properties of the neurons are shown The center of each ellipse represents the BF and BT of a neuron The vertical and horizontal extent of the ellipse represents 1/8 of the width of the STRF ... respectively, of the maximum weight The −10 dB excitatorytuning bandwidth and duration are defined as the spectral √ and temporal extent of the portion of the STRF within 1/ 10 of the peak value ... the direction of time and spectrum The factor of 1/8 was introduced to improve visibility of the data (b) Both the peak (blue) and the high-frequency cutoff (red) of the frequency of spectral modulation...
- 9
- 334
- 0