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RustでJPEG画像の各ピクセルのRGBを取得する

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絵でも描こうかと思っていたら, Rustでimageクレートをたたいていました。

0. 実行環境

  • Windows10 Home
  • rustc 1.39.0

1. 使用したクレート

  • image = "0.22.3"

2. ソースコード

main.rs
use image::open;

fn main() {
    let img = open("src/sample_image.jpg").unwrap().to_rgb();

    let img_width = img.width();    // 画像の幅を取得
    let img_height = img.height();  // 画像の高さを取得

    for y in 0..img_height {
        for x in 0..img_width {
            let pixel = img.get_pixel(x, y);   // (x, y)のピクセルを取得
            let r = pixel[0];
            let g = pixel[1];
            let b = pixel[2];
            println!("({}, {}, {})", r, g, b);
        }
    }
}
Cargo.toml
[package]
name = "image_practice"
version = "0.1.0"
authors = ["*** <miserarenaiyo@example.com>"]
edition = "20XX"

# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html

[dependencies]
image = "0.22.3"

3. 実行結果

(100, 100, 100)
(100, 100, 101)
(100, 100, 100)
.
.
.

上のように延々とRGBが出力されます。

4. 参考URL

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