Figure 6 shows Steps in the case of gray image in (a) the original fingerprint is shown, in (b) the noise reduction is carried out by means of a Lowpass
filter (applied to (a) across the processing frequencies), in (c) the edge enhancement is carried out by applying a unidirectional gradient of (a), in (d) a binarization is carried out on the criterion of the magnitude of the unidirectional gradient, in (e) the slimming of the crests is carried out to obtain a pixel width.
Compact quasi-elliptic microstrip lowpass
filtre with wide stopband, Electronics Letters 46(20): 1384-1385.
The bandpass filter comprises cascaded Frequency Devices Model 90PF H8B and Model 90PF L8B programmable eight-pole highpass and lowpass
The scaling filter is a lowpass
filter, while the wavelet filter is a highpass filter.
With a user-friendly touch screen, the DSP allows audio professionals to mix channels, run time squeeze or compression algorithms, activate a limiter to prevent clipping or insert a lowpass
filter to remove wind noise all powered by one TI DSP device.
So we present a general method to construct a lowpass
matrix filter at first.
and bandpass filtering allows application configuration, lower RMS noise, and elimination of false alarms.
Two stock 70 MHz lowpass
filters can be cascaded to provide a sharp discriminant, suitable for stabilizing the beat frequency at the center of a stock 70 MHz bandpass filter.
The surface EMG signals were rectified and enveloped with use of an 8 Hz, lowpass
, fourth-order Butterworth filter (butter/filtfilt; MATLAB Command, The MathWorks).
The Mixers output In-Phase (I) and Quadrature-Phase (Q) signals, which are then lowpass
filtered and gain controlled before they are digitally sampled.
5" midrange lowpass
starts rolling off slowly at 200Hz, reaching -4dB at 60Hz and then descending to what I have defined as the minimum operating frequency of a driver (-20dB from passband level) at 30Hz.
Since jitter effectively acts as a lowpass
filter , it can be removed via deconvolution.