image_similarity_analyzer 0.0.2

A Flutter plugin to find perceptually similar images in the device photo library using native dHash/aHash on iOS and Android.

Changelog

0.0.2

• Added Android implementation of scanLibraryForSimilar (Kotlin, MediaStore-based). Photo library is scanned natively, thumbnails are hashed with dHash (9×8) and aHash (8×8), and groups of perceptually similar images are returned.
• Pairs are compared by Hamming distance over the 64-bit dHash and clustered with Union-Find, so bursts, edited copies, and resized variants are detected — not just bit-for-bit duplicates.
• Added dHashDistanceThreshold parameter on scanLibraryForSimilar (default 5). Controls Android similarity strictness; lower is stricter.
• Added progressStream (Stream<ScanProgress>) and ScanProgress model exposing real-time scan progress (processed, total, phase). Emitted by Android only; on iOS the stream stays silent.
• On Android, assetId is returned as the bare MediaStore _ID (e.g. "12345"), not a content:// URI.
• iOS implementation is unchanged. The legacy aHashDistanceThreshold parameter (default 0) is still honored by iOS exactly as before.

0.0.1

• Initial release. iOS-only implementation of scanLibraryForSimilar using PhotoKit and Core Image (dHash + aHash perceptual hashing).