Crate blazediff 

Fast image diffing with two-pass block optimization and SIMD.

• Block-based: Cold pass identifies changed blocks, hot pass processes only those
• SIMD: NEON (aarch64), SSE4.1 (x86_64), scalar fallback
• YIQ perceptual delta: More accurate than RGB euclidean distance
• Anti-aliasing detection: Optionally exclude AA pixels from diff count

use blazediff::{diff, load_png, save_png, DiffOptions, Image};

let img1 = load_png("a.png").unwrap();
let img2 = load_png("b.png").unwrap();
let mut output = Image::new(img1.width, img1.height);

let result = diff(&img1, &img2, Some(&mut output), &DiffOptions::default()).unwrap();
save_png(&output, "diff.png").unwrap();
println!("{} pixels differ", result.diff_count);

Re-exports

pub use diff::diff;

pub use io::encode_png;

pub use io::load_png;

pub use io::load_pngs;

pub use io::save_png;

pub use io::save_png_with_compression;

pub use jpeg_io::load_jpeg;

pub use jpeg_io::load_jpegs;

pub use jpeg_io::save_jpeg;

pub use qoi_io::load_qoi;

pub use qoi_io::load_qois;

pub use qoi_io::save_qoi;

pub use types::DiffError;

pub use types::DiffOptions;

pub use types::DiffResult;

Modules

antialiasing

Anti-aliasing detection based on “Anti-aliased Pixel and Intensity Slope Detector” by V. Vysniauskas (2009). Examines 3x3 neighborhood to find gradient patterns.

diff

Two-pass block-based image diff with SIMD acceleration.

io

PNG I/O.

jpeg_io

JPEG I/O.

output

Diff visualization output.

qoi_io

QOI I/O.

simd

SIMD utilities (pixel comparison, YIQ delta).

types

Core types.

yiq

YIQ color math, re-exported from the crate it now lives in so blazediff::yiq::* keeps working. YIQ color space calculations.

Structs

Image

The RGBA8 image buffer, owned by blazediff_shared so every BlazeDiff crate can speak it without depending on this one. A decoded image: RGBA, 4 bytes per pixel, row-major.

Enums

ImageFormat

Image decoding and encoding, re-exported from the crate it now lives in. The container formats BlazeDiff reads and writes.

Functions

decode_image

Image decoding and encoding, re-exported from the crate it now lives in. Decode an encoded buffer, picking the decoder from its magic bytes.

decode_image_pair

Image decoding and encoding, re-exported from the crate it now lives in. Decode two encoded buffers in parallel.

load_image

Image decoding and encoding, re-exported from the crate it now lives in. Load one image, picking the decoder from the file extension.

load_image_pair

Image decoding and encoding, re-exported from the crate it now lives in. Load two images in parallel, picking each decoder from its file extension.