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Image Module

The Image WASM module provides core image-processing functionality for Img2Num. It exposes C++ image utilities, pixel structures, FFT operations, K-means clustering, and region-merging algorithms.

Structure​

src/wasm/modules/image/
├── Makefile
├── build
│   ├── index.js
│   └── index.wasm
├── include
│   ├── Image.h
│   ├── Pixel.h
│   ├── PixelConverter.h
│   ├── PixelConverters.h
│   ├── RGBAPixel.h
│   ├── RGBPixel.h
│   ├── exported.h
│   ├── fft_iterative.h
│   ├── image_utils.h
│   ├── kmeans.h
│   └── mergeSmallRegionsInPlace.h
└── src
    ├── fft_iterative.cpp
    ├── image_utils.cpp
    ├── kmeans.cpp
    └── mergeSmallRegionsInPlace.cpp

Description​

Each header corresponds to a major subsystem:

  • Pixel.h / RGBPixel.h / RGBAPixel.h — Pixel representations.
    • RGBPixel & RGBAPixel inherit from Pixel.
  • Image.h — Core image class.
    • Internally uses a Pixel type.
  • PixelConverters — Functions for converting between pixel formats.
  • fft_iterative — Fast Fourier Transform utilities.
    • Used by Gaussian Blur inside image_utils.h.
  • kmeans — K-means clustering used for quantization.
  • mergeSmallRegionsInPlace — Post-processing step for cleanup after K-means.

Exports​

exported.h defines EXPORTED, a macro used to declare a public API function that can be accessed by external code.