40 releases (20 stable)
5.0.0 | Oct 3, 2024 |
---|---|
4.2.1 | Jul 24, 2024 |
4.0.0 | May 13, 2024 |
3.0.4 | Feb 15, 2024 |
0.1.0 | Jul 31, 2021 |
#5 in Images
199,653 downloads per month
Used in 35 crates
(26 directly)
1MB
20K
SLoC
fast_image_resize
Rust library for fast image resizing with using of SIMD instructions.
Supported pixel formats and available optimizations:
Format | Description | SSE4.1 | AVX2 | Neon | Wasm32 SIMD128 |
---|---|---|---|---|---|
U8 | One u8 component per pixel (e.g. L) |
+ | + | + | + |
U8x2 | Two u8 components per pixel (e.g. LA) |
+ | + | + | + |
U8x3 | Three u8 components per pixel (e.g. RGB) |
+ | + | + | + |
U8x4 | Four u8 components per pixel (e.g. RGBA, RGBx, CMYK) |
+ | + | + | + |
U16 | One u16 components per pixel (e.g. L16) |
+ | + | + | + |
U16x2 | Two u16 components per pixel (e.g. LA16) |
+ | + | + | + |
U16x3 | Three u16 components per pixel (e.g. RGB16) |
+ | + | + | + |
U16x4 | Four u16 components per pixel (e.g. RGBA16, RGBx16, CMYK16) |
+ | + | + | + |
I32 | One i32 component per pixel (e.g. L32) |
- | - | - | - |
F32 | One f32 component per pixel (e.g. L32F) |
+ | + | - | - |
F32x2 | Two f32 components per pixel (e.g. LA32F) |
+ | + | - | - |
F32x3 | Three f32 components per pixel (e.g. RGB32F) |
+ | + | - | - |
F32x4 | Four f32 components per pixel (e.g. RGBA32F) |
+ | + | - | - |
Colorspace
Resizer from this crate does not convert image into linear colorspace during a resize process. If it is important for you to resize images with a non-linear color space (e.g. sRGB) correctly, then you have to convert it to a linear color space before resizing and convert back to the color space of result image. Read more about resizing with respect to color space.
This crate provides the
PixelComponentMapper
structure that allows you to create colorspace converters for images
whose pixels based on u8
and u16
components.
In addition, the crate contains functions create_gamma_22_mapper()
and create_srgb_mapper()
to create instance of PixelComponentMapper
that converts images from sRGB or gamma 2.2 into linear colorspace and back.
Multi-threading
You should enable "rayon"
feature to turn on image processing in
rayon thread pool.
Some benchmarks in single-threaded mode for x86_64
All benchmarks: x86_64, ARM64, WASM32.
Other libraries used to compare of resizing speed:
- image (https://crates.io/crates/image)
- resize (https://crates.io/crates/resize, single-threaded mode)
- libvips (single-threaded mode)
Resize RGB8 image (U8x3) 4928x3279 => 852x567
Pipeline:
src_image => resize => dst_image
- Source image nasa-4928x3279.png
- Numbers in the table mean a duration of image resizing in milliseconds.
Nearest | Box | Bilinear | Bicubic | Lanczos3 | |
---|---|---|---|---|---|
image | 34.13 | - | 88.09 | 142.99 | 191.80 |
resize | 8.87 | 26.97 | 53.08 | 98.26 | 145.74 |
libvips | 2.38 | 61.57 | 5.66 | 9.70 | 16.03 |
fir rust | 0.28 | 10.93 | 15.35 | 25.77 | 37.09 |
fir sse4.1 | 0.28 | 3.43 | 5.39 | 9.82 | 15.34 |
fir avx2 | 0.28 | 2.62 | 3.80 | 6.89 | 13.22 |
Resize RGBA8 image (U8x4) 4928x3279 => 852x567
Pipeline:
src_image => multiply by alpha => resize => divide by alpha => dst_image
- Source image nasa-4928x3279-rgba.png
- Numbers in the table mean a duration of image resizing in milliseconds.
- The
image
crate does not support multiplying and dividing by alpha channel.
Nearest | Box | Bilinear | Bicubic | Lanczos3 | |
---|---|---|---|---|---|
resize | 9.90 | 37.85 | 74.20 | 133.72 | 201.29 |
libvips | 4.17 | 169.03 | 141.52 | 232.30 | 330.89 |
fir rust | 0.19 | 20.66 | 26.02 | 37.27 | 50.21 |
fir sse4.1 | 0.19 | 9.59 | 11.99 | 17.79 | 24.83 |
fir avx2 | 0.19 | 7.21 | 8.61 | 13.22 | 22.41 |
Resize L8 image (U8) 4928x3279 => 852x567
Pipeline:
src_image => resize => dst_image
- Source image nasa-4928x3279.png has converted into grayscale image with one byte per pixel.
- Numbers in the table mean a duration of image resizing in milliseconds.
Nearest | Box | Bilinear | Bicubic | Lanczos3 | |
---|---|---|---|---|---|
image | 29.07 | - | 60.25 | 89.15 | 117.51 |
resize | 6.42 | 11.26 | 20.87 | 42.87 | 69.50 |
libvips | 2.57 | 25.05 | 6.82 | 9.85 | 12.68 |
fir rust | 0.15 | 4.45 | 5.57 | 9.02 | 12.31 |
fir sse4.1 | 0.15 | 1.52 | 2.09 | 3.52 | 5.65 |
fir avx2 | 0.15 | 1.54 | 1.76 | 2.80 | 4.03 |
Examples
Resize RGBA8 image
Note: You must enable "image"
feature to support of
image::DynamicImage.
Otherwise, you have to convert such images into supported by the crate image type.
use std::io::BufWriter;
use image::codecs::png::PngEncoder;
use image::{ExtendedColorType, ImageEncoder, ImageReader};
use fast_image_resize::{IntoImageView, Resizer};
use fast_image_resize::images::Image;
fn main() {
// Read source image from file
let src_image = ImageReader::open("./data/nasa-4928x3279.png")
.unwrap()
.decode()
.unwrap();
// Create container for data of destination image
let dst_width = 1024;
let dst_height = 768;
let mut dst_image = Image::new(
dst_width,
dst_height,
src_image.pixel_type().unwrap(),
);
// Create Resizer instance and resize source image
// into buffer of destination image
let mut resizer = Resizer::new();
resizer.resize(&src_image, &mut dst_image, None).unwrap();
// Write destination image as PNG-file
let mut result_buf = BufWriter::new(Vec::new());
PngEncoder::new(&mut result_buf)
.write_image(
dst_image.buffer(),
dst_width,
dst_height,
src_image.color().into(),
)
.unwrap();
}
Resize with cropping
use image::codecs::png::PngEncoder;
use image::{ColorType, ImageReader, GenericImageView};
use fast_image_resize::{IntoImageView, Resizer, ResizeOptions};
use fast_image_resize::images::Image;
fn main() {
let img = ImageReader::open("./data/nasa-4928x3279.png")
.unwrap()
.decode()
.unwrap();
// Create container for data of destination image
let mut dst_image = Image::new(
1024,
768,
img.pixel_type().unwrap(),
);
// Create Resizer instance and resize cropped source image
// into buffer of destination image
let mut resizer = Resizer::new();
resizer.resize(
&img,
&mut dst_image,
&ResizeOptions::new().crop(
10.0, // left
10.0, // top
2000.0, // width
2000.0, // height
),
).unwrap();
}
Change CPU extensions used by resizer
use fast_image_resize as fr;
fn main() {
let mut resizer = fr::Resizer::new();
#[cfg(target_arch = "x86_64")]
unsafe {
resizer.set_cpu_extensions(fr::CpuExtensions::Sse4_1);
}
}
Dependencies
~0.5–4MB
~94K SLoC