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// isIllustration returns true if image is cartoon like, including
// icons, logos, illustrations.
//
// It returns false for banners, product images, photos.
//
// We use this function to decide on lossy or lossless conversion for PNG when converting
// to the next generation format.
//
// The initial idea is from here: https://legacy.imagemagick.org/Usage/compare/#type_reallife
func (p *ImageMagick) isIllustration(src *img.Image, info *img.Info) (bool, error) {

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func isIllustration(img []byte) (bool, error) {
	mw := imagick.NewMagickWand()

	err := mw.ReadImageBlob(img)
	if err != nil {
		return false, err
	}

	colorsCnt, colors = mw.GetImageHistogram()

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var isIllustrationTests = []*testIsIllustration{
	{"illustration-1.png", true},
	{"illustration-2.png", true},
	{"illustration-3.png", true},
	{"logo-1.png", true},
	{"logo-2.png", true},
	{"banner-1.png", false},
	{"screenshot-1.png", false},
	{"photo-1.png", false},
	{"photo-2.png", false},

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<img src="https://pixboost.com/yoursite.com/hero-banner.jpeg?optimise?auth=your-api-key"
     alt="Superhero rescues the World"/>

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<img src="/hero-banner.jpeg" alt="Superhero rescues the World"/>

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<img src="img/supercar.jpeg" alt="Fast red car"/>

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<picture>
    <source srcset="supercar.avif" type="image/avif">
    <source srcset="supercar.webp" type="image/webp">
    <img src="supercar.jpeg" alt="Fast red car"/>
</picture>

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Format	Size
JPEG	101Kb
WebP	66Kb
AVIF	33Kb

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https://pixboost.com/api/2/img/https://s3-ap-southeast-2.amazonaws.com/bucket-with-images/image.png/optimise?auth=apikey

dooman87

{
    "Version": "2012-10-17",
    "Statement": [
        {
            "Effect": "Allow",
            "Principal": {
                "AWS": "arn:aws:iam::<ACCOUNT_ID>:user/<USER_ID>"
            },
            "Action": "s3:ListBucket",
            "Resource": "arn:aws:s3:::<BUCKET_NAME>"