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jvs:fscan:manual:chapter2:expression:bandpass
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jvs:fscan:manual:chapter2:expression:bandpass [2011/09/18 22:56] voyvodic |
jvs:fscan:manual:chapter2:expression:bandpass [2023/02/23 18:43] (current) |
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| * 1 - frequencies are in Hertz (default: frequencies are seconds) | * 1 - frequencies are in Hertz (default: frequencies are seconds) | ||
| * 2 - 2-d spatial filtering [not implemented yet] (default is temporal filtering) | * 2 - 2-d spatial filtering [not implemented yet] (default is temporal filtering) | ||
| - | * 4 - make output wordsize same as input (default: output is FLOAT32) | + | * 4 - frequencies are number of cycles across time course (default: seconds or Hertz) |
| - | * 8 - filter out 0 frequency (default: 0 freq mean signal is preserved) | + | * 8 - make output wordsize same as input (default: output is FLOAT32) |
| + | * 16 - filter out 0 frequency (default: 0 freq mean signal is preserved) | ||
| + | * 32 - no filtering (test FFT -> reverse FFT) | ||
| Example:\\ | Example:\\ | ||
| < | < | ||
| -expr bandpass 0 30 3 ; filter out frequencies below 30s (0.033 Hz) and above 3s (0.33 Hz) | -expr bandpass 0 30 3 ; filter out frequencies below 30s (0.033 Hz) and above 3s (0.33 Hz) | ||
| - | -expr bandpass 1 0.033 0.33 ; same as above | + | -expr bandpass 1 0.033 0.33 ; same as above, specified in Hertz |
| + | -expr bandpass 4 10 100 ; filter out frequencies below 10 cycles and above 100 cycles | ||
| -expr bandpass 0 10 40 ; filter out frequencies between 10s (0.1 Hz) and 40s (0.025 Hz) | -expr bandpass 0 10 40 ; filter out frequencies between 10s (0.1 Hz) and 40s (0.025 Hz) | ||
| </ | </ | ||
jvs/fscan/manual/chapter2/expression/bandpass.1316386611.txt.gz · Last modified: 2014/08/04 16:03 (external edit)
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