Initialize repository: a small palette test
This commit is contained in:
commit
68c74ab234
GPG key ID:
A12F2C2FFDC3D847
8
.editorconfig
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8
.editorconfig
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||||
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1
.gitignore
vendored
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1
.gitignore
vendored
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@ -0,0 +1 @@
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/target
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338
Cargo.lock
generated
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338
Cargo.lock
generated
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@ -0,0 +1,338 @@
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|||
# This file is automatically @generated by Cargo.
|
||||
# It is not intended for manual editing.
|
||||
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||||
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||||
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||||
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||||
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||||
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||||
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||||
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||||
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||||
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||||
"crossbeam-utils",
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||||
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|
||||
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||||
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||||
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||||
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||||
"memoffset",
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||||
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|
||||
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||||
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"lazy_static",
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"byteorder",
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]
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name = "delyrium"
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version = "0.1.0"
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||||
dependencies = [
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||||
"exoquant",
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"image",
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]
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[[package]]
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name = "exoquant"
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"weezl",
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dependencies = [
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"libc",
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]
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[[package]]
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name = "image"
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dependencies = [
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"bytemuck",
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||||
"byteorder",
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"color_quant",
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||||
"gif",
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||||
"jpeg-decoder",
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||||
"num-iter",
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||||
"num-rational",
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||||
"num-traits",
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"png",
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"scoped_threadpool",
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"tiff",
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]
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[[package]]
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]
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[[package]]
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name = "miniz_oxide"
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||||
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||||
"autocfg",
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]
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||||
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dependencies = [
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"num-traits",
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]
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||||
[[package]]
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source = "registry+https://github.com/rust-lang/crates.io-index"
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dependencies = [
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||||
"autocfg",
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||||
"num-integer",
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||||
"num-traits",
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||||
]
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||||
|
||||
[[package]]
|
||||
name = "num-rational"
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||||
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source = "registry+https://github.com/rust-lang/crates.io-index"
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dependencies = [
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||||
"autocfg",
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||||
"num-integer",
|
||||
"num-traits",
|
||||
]
|
||||
|
||||
[[package]]
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||||
"autocfg",
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||||
]
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||||
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||||
[[package]]
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name = "num_cpus"
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|
||||
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|
||||
dependencies = [
|
||||
"hermit-abi",
|
||||
"libc",
|
||||
]
|
||||
|
||||
[[package]]
|
||||
name = "png"
|
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version = "0.16.8"
|
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source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "3c3287920cb847dee3de33d301c463fba14dda99db24214ddf93f83d3021f4c6"
|
||||
dependencies = [
|
||||
"bitflags",
|
||||
"crc32fast",
|
||||
"deflate",
|
||||
"miniz_oxide 0.3.7",
|
||||
]
|
||||
|
||||
[[package]]
|
||||
name = "rayon"
|
||||
version = "1.5.1"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
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|
||||
dependencies = [
|
||||
"autocfg",
|
||||
"crossbeam-deque",
|
||||
"either",
|
||||
"rayon-core",
|
||||
]
|
||||
|
||||
[[package]]
|
||||
name = "rayon-core"
|
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version = "1.9.1"
|
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source = "registry+https://github.com/rust-lang/crates.io-index"
|
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checksum = "d78120e2c850279833f1dd3582f730c4ab53ed95aeaaaa862a2a5c71b1656d8e"
|
||||
dependencies = [
|
||||
"crossbeam-channel",
|
||||
"crossbeam-deque",
|
||||
"crossbeam-utils",
|
||||
"lazy_static",
|
||||
"num_cpus",
|
||||
]
|
||||
|
||||
[[package]]
|
||||
name = "scoped_threadpool"
|
||||
version = "0.1.9"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
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checksum = "1d51f5df5af43ab3f1360b429fa5e0152ac5ce8c0bd6485cae490332e96846a8"
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||||
|
||||
[[package]]
|
||||
name = "scopeguard"
|
||||
version = "1.1.0"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
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checksum = "d29ab0c6d3fc0ee92fe66e2d99f700eab17a8d57d1c1d3b748380fb20baa78cd"
|
||||
|
||||
[[package]]
|
||||
name = "tiff"
|
||||
version = "0.6.1"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "9a53f4706d65497df0c4349241deddf35f84cee19c87ed86ea8ca590f4464437"
|
||||
dependencies = [
|
||||
"jpeg-decoder",
|
||||
"miniz_oxide 0.4.4",
|
||||
"weezl",
|
||||
]
|
||||
|
||||
[[package]]
|
||||
name = "weezl"
|
||||
version = "0.1.5"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "d8b77fdfd5a253be4ab714e4ffa3c49caf146b4de743e97510c0656cf90f1e8e"
|
||||
10
Cargo.toml
Normal file
10
Cargo.toml
Normal file
|
|
@ -0,0 +1,10 @@
|
|||
[package]
|
||||
name = "delyrium"
|
||||
version = "0.1.0"
|
||||
edition = "2021"
|
||||
|
||||
# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
|
||||
|
||||
[dependencies]
|
||||
exoquant = "0.2.0"
|
||||
image = "0.23.14"
|
||||
14
src/main.rs
Normal file
14
src/main.rs
Normal file
|
|
@ -0,0 +1,14 @@
|
|||
mod palette;
|
||||
|
||||
fn main() {
|
||||
let image = image::open("image.png")
|
||||
.expect("Failed to open image");
|
||||
|
||||
let colors = palette::Palette::generate(image);
|
||||
|
||||
println!("Dominant color: {:?}", colors.dominant_color());
|
||||
println!("All colors:");
|
||||
for color in &colors.raw_colors {
|
||||
println!("\t{:?}", color);
|
||||
}
|
||||
}
|
||||
91
src/palette.rs
Normal file
91
src/palette.rs
Normal file
|
|
@ -0,0 +1,91 @@
|
|||
use image::Rgb;
|
||||
use exoquant::ditherer::FloydSteinberg;
|
||||
use exoquant::Remapper;
|
||||
use exoquant::optimizer::WeightedKMeans;
|
||||
use exoquant::generate_palette;
|
||||
use exoquant::SimpleColorSpace;
|
||||
use image::DynamicImage;
|
||||
use image::GenericImageView;
|
||||
use exoquant::Color;
|
||||
|
||||
const MAX_SIZE_PIXELS: u32 = 160_000;
|
||||
const RESIZE_TARGET_PIXELS: f32 = 90_000.;
|
||||
const NUM_COLORS: usize = 1;
|
||||
|
||||
pub struct Palette {
|
||||
pub raw_colors: [Rgb<u8>; NUM_COLORS],
|
||||
color_frequencies: [usize; NUM_COLORS],
|
||||
}
|
||||
|
||||
impl Palette {
|
||||
pub fn generate(img: DynamicImage) -> Self {
|
||||
|
||||
// Scale the image down if it's too big
|
||||
let thumb = if img.width() * img.height() > MAX_SIZE_PIXELS {
|
||||
let w = img.width() as f32;
|
||||
let h = img.height() as f32;
|
||||
let ratio = w / h;
|
||||
|
||||
let new_width = (ratio * RESIZE_TARGET_PIXELS).sqrt();
|
||||
let new_height = RESIZE_TARGET_PIXELS / new_width;
|
||||
|
||||
img.thumbnail(new_width as u32, new_height as u32)
|
||||
} else {
|
||||
img
|
||||
};
|
||||
|
||||
// Convert to exoquant image
|
||||
let width = thumb.width();
|
||||
let exo_img: Vec<Color> = thumb.into_rgb8()
|
||||
.pixels()
|
||||
.map(|p| Color {r: p[0], g: p[1], b: p[2], a: 255})
|
||||
.collect();
|
||||
|
||||
// Generate histogram
|
||||
let histogram = exo_img.iter().cloned().collect();
|
||||
|
||||
// Generate raw palette
|
||||
let colorspace = SimpleColorSpace::default();
|
||||
let palette = generate_palette(
|
||||
&histogram,
|
||||
&colorspace,
|
||||
&WeightedKMeans,
|
||||
NUM_COLORS,
|
||||
);
|
||||
|
||||
// Quantize the image & count the frequency of each color
|
||||
let ditherer = FloydSteinberg::new();
|
||||
let remapper = Remapper::new(&palette, &colorspace, &ditherer);
|
||||
let remapped = remapper.remap_iter(
|
||||
Box::new(exo_img.into_iter()),
|
||||
width as usize,
|
||||
);
|
||||
let color_counts = remapped.fold([0; NUM_COLORS], |mut counts, pixel| {
|
||||
counts[pixel as usize] += 1;
|
||||
counts
|
||||
});
|
||||
|
||||
// Convert to a more comfortable image::Rgba color format
|
||||
let palette: Vec<Rgb<u8>> = palette.into_iter()
|
||||
.map(|c| Rgb([c.r, c.g, c.b]))
|
||||
.collect();
|
||||
let palette: [Rgb<u8>; NUM_COLORS] = palette.try_into().unwrap();
|
||||
|
||||
|
||||
Self {
|
||||
raw_colors: palette,
|
||||
color_frequencies: color_counts,
|
||||
}
|
||||
}
|
||||
|
||||
pub fn dominant_color(&self) -> &Rgb<u8> {
|
||||
let max_index = self.color_frequencies
|
||||
.iter()
|
||||
.enumerate()
|
||||
.max_by_key(|(_i, count)| *count)
|
||||
.unwrap()
|
||||
.0;
|
||||
|
||||
return &self.raw_colors[max_index];
|
||||
}
|
||||
}
|
||||
Loading…
Reference in a new issue