Fast and safe image scaling in Rust

This crate provides zero unsafe fast rescaling.

Example

let img = ImageReader::open("./assets/nasa-4928x3279.png")
    .unwrap()
    .decode()
    .unwrap();
let dimensions = img.dimensions();
let transient = img.to_rgb8();

let start = Instant::now();

let src_size = ImageSize::new(dimensions.0 as usize, dimensions.1 as usize);
let dst_size = ImageSize::new(dimensions.0 as usize / 4, dimensions.1 as usize / 4);

let resized = resize_rgb8(&transient, src_size, dst_size, 
                          ResamplingFunction::Lanczos3).unwrap();

Example comparison time for downscale RGBA 4928x3279 8 bit image in 4 times.

cargo bench --bench resize_rgba --manifest-path ./app/Cargo.toml

Example comparison time for downscale RGB 4928x3279 8 bit image in 4 times.

cargo bench --bench resize_rgb --manifest-path ./app/Cargo.toml

Example comparison time for downscale RGBA 4928x3279 16 bit image in 4 times.

cargo bench --bench resize_rgba_u16 --manifest-path ./app/Cargo.toml

Example comparison time for downscale RGB 4928x3279 16 bit image in 4 times.

cargo bench --bench resize_rgb_u16 --manifest-path ./app/Cargo.toml

Example comparison time for downscale RGBA 4928x3279 f32 image in 4 times.

cargo bench --bench resize_rgba_f32 --manifest-path ./app/Cargo.toml

This project is licensed under either of

• BSD-3-Clause License (see LICENSE)
• Apache License, Version 2.0 (see LICENSE)

at your option.