Biosignal and biomedical imaging processing (Xử lý hình ảnh Y sinh)

... chất vật lý tượng mà thiết bị sử dụng nguyên tắc xử lý ảnh Trên tinh thần đó, thí nghiệm thiết kế nhằm y u cầu sau: • Hiểu rõ chất vật lý trình truyền sóng âm môi trường chất, mô hình vật lý và ... chất nguyên lý tạo ảnh X quang • Tìm hiểu mô hình vật lý tương tác thuật toán toán học biểu diễn mô hình • Làm quen với công cụ mô Monte Carlo ứng dụng vật l...

Ngày tải lên: 10/04/2013, 15:44

... intensity The lower left image is a combination (logical OR) of the upper images and the lower right image adds a thresholded texture-based image The original and texture images are shown in Figure ... sampled with one-half (left-hand image) and one-quarter (right-hand image) the number of parallel beams used in Figure 13.5 The images have been multiplied by a factor of 10 to...

Ngày tải lên: 23/07/2014, 19:20

... rotated image and the original image. ) Load a frame of the MRI image (mri.tif) and perform a spatial transformation that first expands the image horizontally by 20% then rotates the image by ... 11.3 and Figure 11.5A and B Linear filtering Load the blood cell image Apply a 32nd order lowpass filter having a bandwidth of 125 fs/2, and a highpass filter having the same ord...

Ngày tải lên: 23/07/2014, 19:20

... Fundamentals of Image Processing: MATLAB Image Processing Toolbox IMAGE PROCESSING BASICS: MATLAB IMAGE FORMATS Images can be treated as two-dimensional data, and many of the signal processing approaches ... pixel basis and returns % the absolute difference % Compliments image I % Adds image I and J (images and/ % or constants) to form image % I_add % Subtracts J f...

Ngày tải lên: 23/07/2014, 19:20

... noise s1 = 75 *sin(w*12) ؉ 1*randn(1,N); % Double sin, a sawtooth s2 = sawtooth(w*5,.5)؉ 1*randn(1,N); % and a periodic % function s3 = pulstran((0:999),(0:5)’*180,kaiser(100,3)) ؉ 07* randn(1,N); ... (10 and 20 Hz) The delay of samples and the convergence gain of 0. 075 were determined by trial and error to give the best results with the specified FIR filter length TLFeBOOK Advanced...

Ngày tải lên: 23/07/2014, 19:20

... analysis applications only the subband signals are of interest and reconstruction is not needed, but in many wavelet applications, some operation is performed on the subband signals, ylp(n) and yhp(n), ... Outputs’) end end % HPF = abs(fft(h1,2 56) ); % Calculate and plot filter LPF = abs(fft(h0,2 56) ); % transfer fun of high- and % lowpass filters freq = (1:128)* 1000/2 56; % Ass...

Ngày tải lên: 23/07/2014, 19:20

... 150 Chapter ∞ rxx(τ) = ∫ x(t) x(t + τ) dt (4) −∞ and M rxx(n) = ∑ x(k) x(k + n) (5) k=1 where τ and n are the shift of the waveform with respect to itself In the standard autocorrelation ... preceded and followed by 0 .5 sec of no signal (i.e., zeros) Determine the magnitude of the STFT and plot as both a three-dimensional grid plot and as a contour plot Do not use the Signal Proc...

Ngày tải lên: 23/07/2014, 19:20

... Example 4. 5 and Figure 4. 13 % Bandstop filter with a passband gain of between and 100, % a stopband gain of -40 db between 300 and 40 0 Hz, % and an upper passband gain of between 500 and fs/2 ... bandstop filter that has a passband (gain = 1) between and 100, a stopband between 300 and 40 0 Hz with a gain of 0.1, and an upper passband between 500 and 700 Hz; assuming...

Ngày tải lên: 23/07/2014, 19:20

... available and can be found in the help file for pwelch Example 3. 2 Apply Welch’s method to the sine plus noise data used in Example 3. 1 Use 124-point data segments and a 50% overlap % Example 3. 2 and ... 73 the sidelobes Most alternatives to the rectangular window reduce the sidelobes (they decay away more quickly than those of Figure 3. 6), but at the cost of wider mainlobes Fi...

Ngày tải lên: 23/07/2014, 19:20

... Example 2. 2 Generate bandlimited noise and compute and plot the autocorrelation function for two different bandwidths % Example 2. 2 and Figure 2. 8 % Generate colored noise having two different bandwidths ... quantization step size, δ = VMAX/2N Assuming that the error is uniformly distributed between −δ /2 +δ /2, the variance, σ, is: σ= δ /2 ∫−δ /2 2/ δ dη = V (2 2N )/ 12 Max (...

Ngày tải lên: 23/07/2014, 19:20

... Characteristics MATLAB Implementation xv 97 10 1 10 6 10 8 10 8 10 9 11 1 11 7 11 8 11 9 12 3 12 5 12 5 13 1 13 6 13 8 14 4 14 7 14 7 14 8 14 9 15 4 15 5 15 6 15 6 16 2 16 7 17 2 17 7 17 7 17 8 18 0 18 3 TLFeBOOK xvi Contents The Discrete ... Sampling: Basics Further Study: Buffering and Real-Time Data Processing v 1 10 11 12 13 14 15 16 18 19 20...

Ngày tải lên: 23/07/2014, 19:20

... three-level analysis filter bank Examine the high frequency subband for evidence of the discontinuity % Example 7. 5 and Figures 7. 10 and 7. 11 Discontinuity detection % Construct a waveform of sinusoids ... shown in the lower half of Figure 7. 12 In this decomposition scheme, both highpass and lowpass subbands are further decomposed into highpass and lowpass subbands up till the...

Ngày tải lên: 05/08/2014, 09:45