Module visual 

Visual similarity detection for image and video deduplication.

This module provides:

• Perceptual hashing (pHash, dHash, aHash)
• SSIM (Structural Similarity Index Measure)
• Histogram comparison
• Feature extraction and matching
• Near-duplicate detection with configurable thresholds

Structs

FeaturePoint

Feature point for matching.

Image

Image representation for processing.

PerceptualHash

Perceptual hash result.

SsimConfig

Configuration for SSIM-based thumbnail duplicate detection.

SsimParams

SSIM (Structural Similarity Index) parameters.

VisualSimilarity

Visual similarity metrics.

Functions

compare_histograms

Compare histograms using correlation.

compare_images

Compare visual similarity between two images.

compute_ahash

Compute average hash (aHash).

compute_dhash

Compute difference hash (dHash).

compute_histogram

Compute histogram for an image.

compute_phash

Compute perceptual hash (pHash) using DCT.

compute_ssim

Compute SSIM between two images.

compute_whash

Compute wavelet hash (wHash) using Haar wavelet decomposition.

extract_features

Extract feature points from an image (simplified SIFT-like).

find_ssim_duplicates

Find SSIM duplicates among a list of files using the default 8×8 config.

find_ssim_duplicates_with_config

Find SSIM duplicates among a list of files using a custom config.

match_features

Match features between two images.