Biosignal and Biomedical Image Processing phần 7 pps

... 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

... the quantized signal and the input. TLFeBOOK Contents xvii Data Classes: Intensity Coding Schemes 273 Data Formats 275 Data Conversions 275 Image Display 278 Image Storage and Retrieval 284 Basic ... 67 Aperiodic Functions 69 Frequency Resolution 71 Truncated Fourier Analysis: Data Windowing 71 Power Spectrum 74 MATLAB Implementation 77 Direct FFT and Windowing 77 The W...

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

... component image) arithmetic operations, 285–292even, 67 instantaneous autocorrelation, 150– data, 271 – 273 classes, 273 – 275 152, 165 odd, 67 conversions, 275 – 278 formats, 275 probing, 39–4 smoothing, 1 87 188 ... 150–152 Instantaneous frequency, 15 3processing, 271 –302, 303–342 block, 292–301 Intensity coding, 273 – 275 Intensity images, 273 , 345projection, 377 projection profi...

Ngày tải lên: 06/08/2014, 00:21

... 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 ... rectangle about the appropriate time and frequency centers. % Example 7. 2 and Figure 7. 2 % Plot of wavelet boundaries for various values of ’a’ % Determines the time and sc...

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 ... coefficients: h(n) unknown = [0.5 0 .75 1.2]; h(n) match = [0.503 0 .75 7 1.216]. ADAPTIVE SIGNAL PROCESSING The area of adaptive signal processing is relatively new yet...

Ngày tải lên: 06/08/2014, 00:20

... lowpass filter (sigma = 0.5) and the unsharpe filter (alpha = 0.2) are shown below: h unsharp = ͫ −0.16 67 −0.66 67 −0.16 67 −0.66 67 4.3333 −0.66 67 −0.16 67 −0.66 67 −0.16 67 ͬ ; h gaussian = ͫ 0.0113 ... 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 = i...

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) image...

Ngày tải lên: 06/08/2014, 00:21