image_contrast.md

Image Contrast

Contrast of an image means how different the image's pixels are. The pixels in a low contrast image look similar to each other. High contrast image makes its pixels differ a lot.

We can use adjust_contrast to control the contrast of an image.

fn main() {
    let img = image::open("my_image.jpg").unwrap();
    
    let img2 = img.adjust_contrast(20.);
    img2.save("adjust_contrast_positive.jpg").unwrap();
    
    let img3 = img.adjust_contrast(-20.);
    img3.save("adjust_contrast_negative.jpg").unwrap();
}

A positive parameter of adjust_contrast increases the contrast and a negative parameter decreases the contrast.

Original image:

adjust_contrast_positive.jpg:

adjust_contrast_negative.jpg:

➡️ Next: Blurring Images

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