用于处理的信号过滤库_HTML_Java_下载.zip

# Signal Filter The Signal Filter [Processing](http://processing.org/) library is a simple way to turn noisy raw data–such as a tracker's position or your microphone volume for example–into a signal that changes smoothly over time. Signal Filter is built upon the [OneEuroFilter](http://www.lifl.fr/~casiez/1euro/) by [Géry Casiez](http://www.lifl.fr/~casiez) which is a lightweight alternative to common filtering algorithms. Signal Filter wraps the Java implementation of the 1€ filter by [Stéphane Conversy](http://recherche.enac.fr/~conversy/). *Please report bugs and submit feature requests on the [issues](https://github.com/SableRaf/SignalFilter/issues) page.* ## About “The 1€ filter (“one Euro filter”) is a simple algorithm to filter noisy signals for high precision and responsiveness. It uses a first order low-pass filter with an adaptive cutoff frequency: at low speeds, a low cutoff stabilizes the signal by reducing jitter, but as speed increases, the cutoff is increased to reduce lag.” [Casiez 2012] This library provides convenience functions to deal with the most common scenarios: single signal, coordinates (as PVector or individual floats), multiple channels. Look at the examples and the documentation for more information. To learn more about the 1€ Filter algorithm, read the [CHI 2012 paper (PDF)](https://hal.inria.fr/hal-00670496/document) by [Géry Casiez](http://www.lifl.fr/~casiez). You can also try the [online demo](http://cristal.univ-lille.fr/~casiez/1euro/InteractiveDemo/) of the 1€ filter for a comparison with other filters. ## Installation (PDE) To install the Signal Filter library in the Processing Development Environment, go to `tools > Manage Tools...` and find the `Libraries` tab. Search for "Signal Filter" and click `install`. ## Usage Import the library, create your filter, and apply it to your signal. You can get more control over the parameters (look at comments in the examples for instructions). ```java // Add the library to the sketch import signal.library.*; // ----------------------------------------------------- // Create the filter SignalFilter myFilter; // ----------------------------------------------------- // Variables for the dummy & filtered signal float sourceSignal; float noisySignal; float filteredSignal; void setup() { // ----------------------------------------------------- // Initialize the filter myFilter = new SignalFilter(this); // ----------------------------------------------------- } void draw() { // Generate a dummy signal sourceSignal = sin(frameCount / 1000.0); // Add random noise to our dummy signal noisySignal = sourceSignal + random(-0.05, 0.05); // ----------------------------------------------------- // Filter the signal filteredSignal = myFilter.filterUnitFloat( noisySignal ); // ----------------------------------------------------- // Display the results in the console println(""); println("Source = " + sourceSignal); println("Noisy = " + noisySignal); println("Filtered = " + filteredSignal); } ``` ## Examples After installing the Signal Filter library, you will find the following examples in `File > Examples... > Contributed Libraries > Signal Filter` * [helloFilter](https://github.com/SableRaf/signalfilter/tree/master/SignalFilter/examples/helloFilter/helloFilter.pde) * [basicFilter](https://github.com/SableRaf/signalfilter/tree/master/SignalFilter/examples/basicFilter/basicFilter.pde)  * [multiFilter](https://github.com/SableRaf/signalfilter/tree/master/SignalFilter/examples/multiFilter/multiFilter.pde)  * [coordFilter](https://github.com/SableRaf/signalfilter/tree/master/SignalFilter/examples/coordFilter/coordFilter.pde)  ## Tested Processing Versions: * 4.0.1 * 3.5.3 * 3.4 * 2.0.1 * 2.0 * 2.0b9 * 2.0b8 * 2.0b7 * 1.5.1 ## Dependencies None. ## Questions? Wanna chat? Ping me on [Twitter](https://twitter.com/sableRaph). For bug reports, please use the [issues](https://github.com/SableRaf/SignalFilter/issues) page. ## License * The library is Open Source Software released under the [GNU General Public License](http://www.gnu.org/licenses/gpl.html). It is developed and maintained by [Raphaël de Courville](https://twitter.com/sableRaph). *This README file was last updated on 2020-11-26*