img_hash_PHash

img_hashclassOpenCV 5.0.0

import { img_hash_PHash } from '@banou/opencv-wasm'

Use after await initOpenCV(). See the initialization and named imports guide.

Explore visually: Perceptual image hashes →

Compress selected visual statistics into a small representation for image comparison.

VISUAL WALKTHROUGHSimilarity

REFERENCE INPUTImage structure

A perceptual signature retains coarse appearance rather than every pixel.

→

RESULTCompare compact bit signatures

The displayed bits illustrate a signature, not a hash computed from this drawing. Choose the distance defined by the specific hash API.

Illustrative example. The stages explain the method; they are not a live OpenCV execution.

Native object: release it with using or delete(). Factories can return null; check before calling methods. Inherits img_hash_ImgHashBase.

pHash

Slower than average_hash, but tolerant of minor modifications

This algorithm can combat more variation than averageHash, for more details please refer to [lookslikeit]

Upstream declaration ↗

Constructors and members

static create

Create an owned img_hash_PHash instance with the supplied configuration.

pHash

create(): img_hash_PHash | null;

Returns

The img_hash_PHash | null result.

Upstream declaration ↗

clone

Create another handle to the same native object. This retains the object without copying its pixels or algorithm state; dispose both handles separately.

clone(): this;

Returns

The this result.

These signatures describe this package. Upstream documentation can mention optional backends that are absent from this build. Check runtime compatibility before choosing a backend or file format.