Quality

The Quality parameter defines whether the image should be delivered as:

This can be useful for some image processing tools like OCR generation. To see what types a image server supports you can look into the info.json profile section:

https://ids.lib.harvard.edu/ids/iiif/25286607/info.json

profile": [

    "http://iiif.io/api/image/2/level2.json",
    {
        "supports": [
            "canonicalLinkHeader",
            "profileLinkHeader",
            "mirroring",
            "rotationArbitrary",
            "regionSquare",
            "sizeAboveFull"
        ],
        "qualities": [
            "default",
            "bitonal",
            "gray",
            "color"
        ],
        "formats": [
            "jpg",
            "tif",
            "png",
            "gif",
            "webp"
        ]
    }

],

See the example below: