Biosignal and Biomedical Image Processing phần 5 ppt

... Uses the equations for center time and frequency and for time % and frequency spread given in Eqs. (7–10) % TLFeBOOK Time–Frequency Analysis 1 75 F IGURE 6. 15 The Rihaczek-Margenau distribution ... evidenced by the appearance of energy slightly before 0 .5 sec and slightly after 1 .5 sec, and energies at frequen- cies other than 10 and 40 Hz. In this example, the time resolut...

Ngày tải lên: 06/08/2014, 00:20

... given in Problem 5. % Example 8 .5 and Figure 8.10 Adaptive Noise Cancellation % Use an adaptive filter to eliminate sinusoidal noise from a % narrowband signal % % Generate signal and noise close ... filter % close all; clear all; fig1 = figure(’Units’,’inches’,’Position’,[0 2 .5 3 3 .5] ); fig2 = figure(’Units’, ’inches’,’Position’,[3 2 .5 5 5] ); fs = 1000; % Sample frequency TLF...

Ngày tải lên: 06/08/2014, 00:20

... Correlation, and Covariance 43 Convolution and the Impulse Response 43 Covariance and Correlation 46 MATLAB Implementation 49 Sampling Theory and Finite Data Considerations 53 Edge Effects 57 Problems 58 3 ... 8-bit binary number capable of 2 8 or 256 discrete states, and the input amplitude range is 0.0 5. 0 volts, then the quantization interval will be 5/ 256 or 0.01 95 vo...

Ngày tải lên: 06/08/2014, 00:20

... signal processing algorithms and data that can be used to evaluate a signal processing system under development. The Web is becoming an evermore useful tool in signal and image processing, and a ... box and record the following output: Frequency (Hz): 2 10 20 60 100 1 25 150 200 300 400 V out volts rms: . 15 10 −7 0.1×10 −3 0.002 0.2 1 .5 3.28 4.47 4.97 4.99 5. 0 What is the...

Ngày tải lên: 06/08/2014, 00:20

... 0.1, and an upper passband between 50 0 and 1000 Hz (assuming f s /2 = 1000) with the same ripple as the lower passband. The f , a , and dev vectors would be: f = [100 300 400 50 0] ; a = [101] ; and dev ... response: a 15th order Parks–McClellan; a 15th-order rectangular window; a 30th-order rectangular window; and a 15th-order least squares firls . Use a bandwidth of 0. 15 f s...

Ngày tải lên: 06/08/2014, 00:20

... four different image classes or encoding schemes are: indexed images, RGB images, intensity images, and binary images. The first two classes are used to store color images. In indexed images, the ... 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); % % Plot original signals displaced for viewing TLFeBOOK...

Ngày tải lên: 06/08/2014, 00:20

... weighted sum of images. For example to add 0 .5 of image I1 to 0.3 of image I2, to 0. 75 of Image I3, use: % Linear combination of images I_combined = imlincomb ( .5, I1, .3, I2, . 75, I3); The arithmetic ... 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 .1 25 % fs/2, and a highpass filter h...

Ngày tải lên: 06/08/2014, 00:20

... rotated image and the origin al image. ) 9. Load a frame of the MRI image ( mri.tif ) and perform a spatial transfor- mation that first expands the image horizontally by 20% then rotates the image by ... montage of the first 12 images. 8. Load frame 12 of mri.tif and use imrotate to rotate the image by 15 degrees clockwise. Also reduce image contra st of the rotated image...

Ngày tải lên: 06/08/2014, 00:21

... nominal image range. The intensity thresh- olded images are shown in Figure 12. 15 (upper images; the upper right image has been inverted). These images are combined in the lower left image. The lower ... the square pattern of Figure 13 .5 sampled with one-half (left-hand image) and one-quarter (right-hand im- age) the number of parallel beams used in Figure 13 .5. The images have b...

Ngày tải lên: 06/08/2014, 00:21