Show HN: JSciPy – SciPy-inspired signal processing library for Java and Android

Summary

jSciPy: Java Scientific Computing Library jSciPy is a comprehensive Java Scientific Computing and Signal Processing Library designed for Machine Learning on the JVM and Android. Inspired by Python's SciPy, it provides high-performance implementations of essential algorithms. It currently includes modules for: Signal Processing : Butterworth, Chebyshev, Elliptic, Bessel, and FIR ( firwin ) filters, Window Functions, 2D Convolution, Savitzky-Golay smoothing, Peak detection, Detrending, Median Filter. : Butterworth, Chebyshev, Elliptic, Bessel, and FIR ( ) filters, Window Functions, 2D Convolution, Savitzky-Golay smoothing, Peak detection, Detrending, Median Filter. Transformations : FFT (Fast Fourier Transform), Hilbert Transform, Welch PSD, Spectrogram, Periodogram, Convolution, DCT/IDCT. : FFT (Fast Fourier Transform), Hilbert Transform, Welch PSD, Spectrogram, Periodogram, Convolution, DCT/IDCT. Math & Analysis: RK4 ODE Solver, Interpolation (Linear, Cubic Spline), Resampling, Polynomial fitting. In modern machine learning workflows, most signal processing tasks rely on Python's SciPy utilities. However, there is no Java library that replicates SciPy's behavior with comparable completeness and consistency. This creates a significant gap for teams building ML or signal processing pipelines on the JVM. jSciPy aims to fill this gap, and the demand for such a library is higher than ever. Table of Contents Why jSciPy? The table below compares jSciPy’s signal processing and scientific computing features with several other popular Java libraries, highlighting areas where jSciPy provides more comprehensive functionality. Feature / Characteristic jSciPy Commons Math JDSP TarsosDSP IIRJ EJML Primary Focus SciPy-style Signal + Scientific General Math/Stats Java DSP Toolbox Audio Processing IIR Filter Only Linear Algebra Zero-Phase Filtering ( filtfilt ) ✅ Yes (SciPy-compatible) ❌ No ❌ No ❌ No ❌ No ❌ No 2D Signal Ops ( conv2d , fft2 ) ✅ Yes ❌ No ❌ No ❌ No ❌ No ❌ No SciPy-like ...