Biosignal and Biomedical Image Processing phần 11 pps

... 87, 106–108, 117 –123, 213, 222 223 Yule-Walker, 118 invertible, 188 Laplacian, 312, 353, 369 Filter design, 94, 311 313 three-stage FIR, 111 117 linear, 308–310 log, 369 three-stage IIR, 119 –123 two-stage ... is not as sharp as the original image and sharpness is reduced further by the cosine filter with its lowered bandwidth. (Original image from the MATLAB Image Processing T...

Ngày tải lên: 06/08/2014, 00:21

... passband region and it has half the power of the unattenu- ated signal (since 0.707 2 = 1/2). Accordingly this point is also known as the half-power point. TLFeBOOK Biosignal and Biomedical Image ... digital signal and image processing concerns. To the extent possible, each topic is introduced with the minimum amount of information required to use and understand the approach...

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 ... a random time series with a narrow bandwidth (left) and broader bandwidth (right). Note the inverse relationship be- tween the autocorrelation function and the spectrum: the broad...

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 ... color images, the data sets do not lend themselves to arithmetic operations (and, hence, most image processing operations) since the results do not always produce meaningful images. Index...

Ngày tải lên: 06/08/2014, 00:20

... and II, and elliptic filters. Use a cutoff frequency of 200 Hz and assume a sampling fre- quency of 2 kHz. For all filters, the passband ripple should be less than 3 db and the minimum stopband ... of these ranges and is the same length as a . For example, assume you desire a bandstop filter that has a passband between 0 and 100 with a ripple of 0.01, a stopband between 300 and...

Ngày tải lên: 06/08/2014, 00:20

... time, t 0 , will always be zero, and an appropriate offset time, t 1 , is added during plot- ting. The time and frequency boundaries are calculated using Eqs. (7) and (9), and the resulting boundaries ... correlation between the waveform and the wavelet at various translations and scales: the similarity be- tween the waveform and the wavelet at a given combination of scale and...

Ngày tải lên: 06/08/2014, 00:20

... 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 2 sinusoids ... Eq. (11) can easily be implemented in MATLAB, as shown in the next section. Adaptive filtering has a number of applications in biosignal processing. It can be used to suppress...

Ngày tải lên: 06/08/2014, 00:20

... image I I_add = imadd(I, J); % Adds image I and J (images and/ % or constants) to form image % I_add I_sub = imsubtract(I, J); % Subtracts J from image I I_divide = imdivide(I, J) % Divides image ... Example 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 f...

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 ... Transformations, and Registration 335 F IGURE 11. 13 Unaided image registration requiring several affine transforma- tions. The left image is the original (reference) ima...

Ngày tải lên: 06/08/2014, 00:21