IMAGE Archives - icodebroker

[RUST/IMAGE] DynamicImage 열거형 : get_pixel/put_pixel 메소드를 사용해 색상 반전 이미지 파일 생성하기

■ DynamicImage 열거형의 get_pixel/put_pixel 메소드를 사용해 색상 반전 이미지 파일을 생성하는 방법을 보여준다. ▶ Cargo.toml


[package]
name = "test_project"
version = "0.1.0"
edition = "2021"

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

[dependencies]
image = "0.23.14"

[package]

name = "test_project"

version = "0.1.0"

edition = "2021"

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

[dependencies]

image = "0.23.14"

▶ src/main.rs


use image::GenericImage;
use image::GenericImageView;
use image::Rgba;

fn main()
{
    let argument_vector : Vec<String> = std::env::args().collect();

    if argument_vector.len() < 2
    {
        println!("[USAGE] test_project imagefile");

        return;
    }

    let source_file_path : String = argument_vector[1].clone();

    let file_path_element_vector : Vec<&str> = source_file_path.split(".").collect();

    let target_file_path : String = format!("{}_inversed.jpg", file_path_element_vector[0]);

    println!("Source File Path : {}", source_file_path);
    println!("Target File Path : {}", target_file_path);

    let mut source_dynamic_image : image::DynamicImage = image::open(source_file_path).expect("파일 로드시 에러가 발생합니다.");

    let (image_width, image_height) = source_dynamic_image.dimensions();

    for y in 0..image_height
    {
        for x in 0..image_width
        {
            let source_rgba : Rgba<u8> = source_dynamic_image.get_pixel(x, y);

            let target_rgba : Rgba<u8> = Rgba([255 - source_rgba[0], 255 - source_rgba[1], 255 - source_rgba[2], source_rgba[3]]);

            source_dynamic_image.put_pixel(x, y, target_rgba);
        }
    }

    source_dynamic_image.save(target_file_path).unwrap();
}

use image::GenericImage;

use image::GenericImageView;

use image::Rgba;

fn main()

{

let argument_vector : Vec<String> = std::env::args().collect();

if argument_vector.len() < 2

{

println!("[USAGE] test_project imagefile");

return;

}

let source_file_path : String = argument_vector[1].clone();

let file_path_element_vector : Vec<&str> = source_file_path.split(".").collect();

let target_file_path : String = format!("{}_inversed.jpg", file_path_element_vector[0]);

println!("Source File Path : {}", source_file_path);

println!("Target File Path : {}", target_file_path);

let mut source_dynamic_image : image::DynamicImage = image::open(source_file_path).expect("파일 로드시 에러가 발생합니다.");

let (image_width, image_height) = source_dynamic_image.dimensions();

for y in 0..image_height

{

for x in 0..image_width

{

let source_rgba : Rgba<u8> = source_dynamic_image.get_pixel(x, y);

let target_rgba : Rgba<u8> = Rgba([255 - source_rgba[0], 255 - source_rgba[1], 255 - source_rgba[2], source_rgba[3]]);

source_dynamic_image.put_pixel(x, y, target_rgba);

}

source_dynamic_image.save(target_file_path).unwrap();

}

test_project.zip

[RUST/IMAGE] DynamicImage 열거형 : thumbnail 메소드를 사용해 썸네일 이미지 구하기

■ DynamicImage 열거형의 thumbnail 메소드를 사용해 썸네일 이미지를 구하는 방법을 보여준다. ▶ 예제 코드 (RS)


use image;

let source_dynamic_image : image::DynamicImage = image::open("d:/source.jpg").unwrap();

let target_dynamic_image : image::DynamicImage = source_dynamic_image.thumbnail(256, 256);

target_dynamic_image.save("d:/target.jpg").unwrap();

use image;

let source_dynamic_image : image::DynamicImage = image::open("d:/source.jpg").unwrap();

let target_dynamic_image : image::DynamicImage = source_dynamic_image.thumbnail(256, 256);

target_dynamic_image.save("d:/target.jpg").unwrap();

[RUST/IMAGE] resize 함수 : 이미지 크기 변경하기

■ resize 함수를 사용해 이미지 크기를 변경하는 방법을 보여준다. ▶ 예제 코드 (RS)


use image;
use image::imageops;

let mut source_dynamic_image : image::DynamicImage = image::open("d:/source.jpg").unwrap();

let target_image_buffer : image::ImageBuffer<image::Rgba<u8>, Vec<u8>> = imageops::resize
(
    &mut source_dynamic_image,
    256,
    256,
    imageops::Lanczos3
);

target_image_buffer.save("d:/target.jpg").unwrap();

use image;

use image::imageops;

let mut source_dynamic_image : image::DynamicImage = image::open("d:/source.jpg").unwrap();

let target_image_buffer : image::ImageBuffer<image::Rgba<u8>, Vec<u8>> = imageops::resize

(

&mut source_dynamic_image,

256,

imageops::Lanczos3

);

target_image_buffer.save("d:/target.jpg").unwrap();

※ 참조 크레이트 : image

[RUST/IMAGE] crop 함수 : 이미지 잘라내기

■ crop 함수를 사용해 이미지를 잘라내는 방법을 보여준다. ▶ 예제 코드 (RS)


use image;
use image::imageops;

let mut source_dynamic_image : image::DynamicImage = image::open("d:/source.jpg").unwrap();

let subsidary_image : image::SubImage<&mut image::DynamicImage> = imageops::crop
(
    &mut source_dynamic_image,
    50,
    50,
    200,
    200
);

let target_image_buffer : image::ImageBuffer<image::Rgba<u8>, Vec<u8>> = subsidary_image.to_image();

target_image_buffer.save("d:/target.jpg").unwrap();

use image;

use image::imageops;

let mut source_dynamic_image : image::DynamicImage = image::open("d:/source.jpg").unwrap();

let subsidary_image : image::SubImage<&mut image::DynamicImage> = imageops::crop

(

&mut source_dynamic_image,

50,

200,

200

);

let target_image_buffer : image::ImageBuffer<image::Rgba<u8>, Vec<u8>> = subsidary_image.to_image();

target_image_buffer.save("d:/target.jpg").unwrap();

※ 참조 크레이트 : image

[RUST/IMAGE] DynamicImage 열거형 : dimensions 메소드를 사용해 이미지 크기 구하기

■ DynamicImage 열거형의 dimensions 메소드를 사용해 이미지 크기를 구하는 방법을 보여준다. ▶ 예제 코드 (RS)


use image;
use image::GenericImageView;

let dynamic_image : image::DynamicImage = image::open("d:/source.jpg").unwrap();

let image_size : (u32, u32) = dynamic_image.dimensions();

println!("{} * {}", image_size.0, image_size.1);

use image;

use image::GenericImageView;

let dynamic_image : image::DynamicImage = image::open("d:/source.jpg").unwrap();

let image_size : (u32, u32) = dynamic_image.dimensions();

println!("{} * {}", image_size.0, image_size.1);

※ 참조 크레이트 : image

[RUST/IMAGE] open 함수 : 이미지 파일 로드하기

■ open 함수를 사용해 이미지 파일을 로드하는 방법을 보여준다. ▶ 예제 코드 (RS)


use image;

let dynamic_image : image::DynamicImage = image::open("d:/source.jpg").unwrap();

use image;

let dynamic_image : image::DynamicImage = image::open("d:/source.jpg").unwrap();

※ 참조 크레이트 : image

[RUST/IMAGE] ImageBuffer 구조체 : from_fn 연관 함수를 사용해 이미지 생성하기

■ ImageBuffer<P, Container> 구조체의 from_fn 연관 함수를 사용해 이미지를 생성하는 방법을 보여준다. ▶ Cargo.toml


[package]
name = "test_project"
version = "0.1.0"
edition = "2021"

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

[dependencies]
image = "0.23.14"

[package]

name = "test_project"

version = "0.1.0"

edition = "2021"

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

[dependencies]

image = "0.23.14"

▶ src/main.rs


use image;

fn main()
{
    let white_rgb : image::Rgb<u8> = image::Rgb::<u8>([255, 255, 255]);
    let red_rgb   : image::Rgb<u8> = image::Rgb::<u8>([255,  90,  90]);

    let checker_width : u32 = 64;

    let draw = |x, y|
    {
        let (x_index, y_index) = (x / checker_width, y / checker_width);

        match (x_index % 2, y_index % 2)
        {
            (0, 0) => white_rgb,
            (1, 0) => red_rgb,
            (0, 1) => red_rgb,
            (1, 1) => white_rgb,
            (_, _) => panic!("error"),
        }
    };

    let image_buffer : image::ImageBuffer<image::Rgb<u8>, Vec<u8>> = image::ImageBuffer::from_fn(512, 512, draw);

    image_buffer.save("d:/checkerboard.png").unwrap();
}

use image;

fn main()

{

let white_rgb : image::Rgb<u8> = image::Rgb::<u8>([255, 255, 255]);

let red_rgb : image::Rgb<u8> = image::Rgb::<u8>([255, 90, 90]);

let checker_width : u32 = 64;

let draw = |x, y|

{

let (x_index, y_index) = (x / checker_width, y / checker_width);

match (x_index % 2, y_index % 2)

{

(0, 0) => white_rgb,

(1, 0) => red_rgb,

(0, 1) => red_rgb,

(1, 1) => white_rgb,

(_, _) => panic!("error"),

}

};

let image_buffer : image::ImageBuffer<image::Rgb<u8>, Vec<u8>> = image::ImageBuffer::from_fn(512, 512, draw);

image_buffer.save("d:/checkerboard.png").unwrap();

}

test_project.zip

[RUST/IMAGE] 썸네일 이미지 파일 생성하기

■ 썸네일 이미지 파일을 생성하는 방법을 보여준다. ▶ Cargo.toml


[package]
name = "test_project"
version = "0.1.0"
edition = "2021"

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

[dependencies]
image = "0.23.14"

[package]

name = "test_project"

version = "0.1.0"

edition = "2021"

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

[dependencies]

image = "0.23.14"

▶ src/main.rs


use image::{self, imageops, GenericImageView};

fn main()
{
    let target_image_size : u32 = 128;

    let argument_vector : Vec<String> = std::env::args().collect();

    if argument_vector.len() < 2
    {
        println!("[USAGE] image_thumb imagefile");

        return;
    }

    let source_file_path : String = String::from(&argument_vector[1]);

    let source_file_path_vector : Vec<&str> = source_file_path.split(".").collect();

    let target_file_path : String = format!("{}_thumbnail.png", source_file_path_vector[0]);

    println!("Source File Path : {}", source_file_path);
    println!("Target File Path : {}", target_file_path);

    let mut source_dynamic_image : image::DynamicImage = image::open(source_file_path).expect("파일 오픈시 에러가 발생했습니다.");

    let source_image_size : (u32, u32) = source_dynamic_image.dimensions();

    let target_image_width : u32 = if source_image_size.0 > source_image_size.1 { source_image_size.1 } else { source_image_size.0 };

    let mut cropped_image_buffer : image::ImageBuffer<image::Rgba<u8>, Vec<u8>> = imageops::crop
    (
        &mut source_dynamic_image,
        (source_image_size.0 - target_image_width) / 2,
        (source_image_size.1 - target_image_width) / 2,
        target_image_width,
        target_image_width
    ).to_image();

    let target_image_buffer : image::ImageBuffer<image::Rgba<u8>, Vec<u8>> = imageops::resize
    (
        &mut cropped_image_buffer,
        target_image_size,
        target_image_size,
        imageops::Lanczos3
    );

    target_image_buffer.save(target_file_path).unwrap();
}

use image::{self, imageops, GenericImageView};

fn main()

{

let target_image_size : u32 = 128;

let argument_vector : Vec<String> = std::env::args().collect();

if argument_vector.len() < 2

{

println!("[USAGE] image_thumb imagefile");

return;

}

let source_file_path : String = String::from(&argument_vector[1]);

let source_file_path_vector : Vec<&str> = source_file_path.split(".").collect();

let target_file_path : String = format!("{}_thumbnail.png", source_file_path_vector[0]);

println!("Source File Path : {}", source_file_path);

println!("Target File Path : {}", target_file_path);

let mut source_dynamic_image : image::DynamicImage = image::open(source_file_path).expect("파일 오픈시 에러가 발생했습니다.");

let source_image_size : (u32, u32) = source_dynamic_image.dimensions();

let target_image_width : u32 = if source_image_size.0 > source_image_size.1 { source_image_size.1 } else { source_image_size.0 };

let mut cropped_image_buffer : image::ImageBuffer<image::Rgba<u8>, Vec<u8>> = imageops::crop

(

&mut source_dynamic_image,

(source_image_size.0 - target_image_width) / 2,

(source_image_size.1 - target_image_width) / 2,

target_image_width,

target_image_width

).to_image();

let target_image_buffer : image::ImageBuffer<image::Rgba<u8>, Vec<u8>> = imageops::resize

(

&mut cropped_image_buffer,

target_image_size,

imageops::Lanczos3

);

target_image_buffer.save(target_file_path).unwrap();

}

test_project.zip