deltae

Library

A rust library for converting colors and calculating DeltaE (color difference).

Check out the documentation here: Rust API Documentation

...or compile it yourself:

sh cargo doc --open

Examples

```rust use std::error::Error; use std::str::FromStr; use deltae::*;

fn main() -> Result<(), Box>{ let lab0 = LabValue::from_str("89.73, 1.88, -6.96").unwrap(); let lab1 = LabValue { l: 95.08, a: -0.17, b: -10.81, }.validate()?;

println!("{}", &lab0); // [L:89.73, a:1.88, b:-6.96]

let de0 = DeltaE::new(&lab0, &lab1, DE2000).round_to(4);

println!("{}: {}", de0.method, de0.value); // DE2000: 5.3169

let lch0 = LchValue::from(lab0);
println!("{}", lch0.round_to(4)); // [L:89.73, c:7.2094, h:285.1157]
let lab2 = LabValue::from(lch0);
println!("{}", lab0.round_to(4)); // [L:89.73, c:1.88, h:-6.96]
assert_eq!(lch0, lab2);

let de1 = lch0.delta(lab1, DE2000);
assert_eq!(de0, de1.round_to(4));


assert_eq!(lab0.round_to(4), lab2.round_to(4));

Ok(())

} ```

Binary

The binary included with this library is a command line application that calculates Delta E between to Lab colors.

Usage

```txt deltae 0.2.0 Ryan O'Beirne ryanobeirne@gmail.com Calculate Delta E between two colors in CIE Lab space.

USAGE: deltae [OPTIONS]

FLAGS: -h, --help Prints help information -V, --version Prints version information

OPTIONS: -c, --color-type Set color type [default: lab] [possible values: lab, lch, xyz] -m, --method Set DeltaE method [default: 2000] [possible values: 2000, 1994, 1994T, CMC1, CMC2, 1976]

ARGS: Reference color values Sample color values ```

Example

sh deltae --method=de1976 "89.73, 1.88, -6.96" "95.08, -0.17, -10.81"

Install

sh git clone https://github.com/ryanobeirne/deltae cd deltae cargo install --example=deltae --path=. --force

Notes

Calculates DE2000, DE1994 (Graphic Arts and Textiles), DECMC (with a tolerance for lightness and chroma), and DE1976. The Default is DE2000.