Quality
The Quality parameter defines whether the image should be delivered as:
| Name | Definition |
|---|---|
| Default | The source colour |
| Gray | Grayscale |
| Bitonal | Each pixel is black or white |
| Color | The color image. This could be a colorized black and white image |
This can be useful for some image processing tools like OCR generation. To see what qualities a image server supports you can look into the info.json extraQualities property:
https://media.artmuseum.princeton.edu/iiif/3/collection/y1982-103/info.json
{
"@context": "http://iiif.io/api/image/3/context.json",
"id": "https://media.artmuseum.princeton.edu/iiif/3/collection/y1982-103",
"type": "ImageService3",
...
"extraFormats": [ "jpeg", "tif", "tiff", "webp" ],
"extraQualities": [ "color", "gray", "bitonal" ],
...
}
See the example below: