prometheus is a distributed digital image archive that currently makes more than 3,496,000 images of over 120 databases from institutes, research facilities and museums researchable on a common user interface.
Situated at the Institute of Art History of the University of Cologne, prometheus is supported by the non-profit association prometheus e.V. which promotes the ongoing developments of the digital media for science and research.
Image series of the week
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3,913,931 images and 44,344 ratings of images are the current figures in the image archive. So there are not that many image ratings. We are currently wondering what the reason for this might be.
Results from last year’s survey and from various seminars have given us brief indications that the rating of images with up to five stars may be known, but that we have not yet sufficiently communicated the advantages of image ratings for you in your searches and collections. So let’s start with that.
The rating scale ranges from one star for „unusable“ to three stars for „usable“ and five stars for „very good“. By awarding stars, you rate the quality of the images. Criteria include resolution, color fidelity, image detail and orientation as well as Moiré pattern. These ratings automatically influence the ranking when the relevant search results are displayed.
In addition, you can actively use the sorting options „by average ratings“ and „by number of ratings“, as in our example of the image collection „Image series 2025 / 18 – Animals in art“. In the first case, the images are sorted according to the average rating values, from 5.0 to 3.0, and in the second case according to the number of ratings, from 2 to 1.
Do you agree with the ratings given or do you see an image rated with three stars („usable“) differently?
You can also place more precise descriptions such as „mirror-inverted“ in the comment directly on the image. A search with this search term shows, for example, the images commented on in this way, because the comments are integrated directly into the search index.
However, you can also see the comments on the image without searching for them when the search results are displayed both in the gallery view and in the list view directly below the image. By clicking on „Comment“ you will then receive the additional information from the community directly. By optimizing retrieval in this way, you can benefit from the expertise of others and contribute your own knowledge.
