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  2. PhotoDNA - Wikipedia

    en.wikipedia.org/wiki/PhotoDNA

    In the 2010s and 2020s, PhotoDNA was put forward in connection with policy proposals relating to content moderation and internet censorship, [13] including US Senate hearings (2019 on "digital responsibility", [2] 2022 on the EARN IT Act [14]) and various proposals by the European Commission dubbed "upload filters" by civil society [15] [16 ...

  3. Perceptual hashing - Wikipedia

    en.wikipedia.org/wiki/Perceptual_hashing

    [1] [2] A perceptual hash is a type of locality-sensitive hash, which is analogous if features of the multimedia are similar. This is in contrast to cryptographic hashing , which relies on the avalanche effect of a small change in input value creating a drastic change in output value.

  4. Wikipedia:Images - Wikipedia

    en.wikipedia.org/wiki/Wikipedia:Images

    Wikipedia:Picture of the day is an image which is automatically updated each day with an image from the list of featured pictures. The {{}} template produces the image shown above.

  5. List of hash functions - Wikipedia

    en.wikipedia.org/wiki/List_of_hash_functions

    hash HAS-160: 160 bits hash HAVAL: 128 to 256 bits hash JH: 224 to 512 bits hash LSH [19] 256 to 512 bits wide-pipe Merkle–Damgård construction: MD2: 128 bits hash MD4: 128 bits hash MD5: 128 bits Merkle–Damgård construction: MD6: up to 512 bits Merkle tree NLFSR (it is also a keyed hash function) RadioGatún: arbitrary ideal mangling ...

  6. Digital video fingerprinting - Wikipedia

    en.wikipedia.org/wiki/Digital_video_fingerprinting

    Video fingerprinting or video hashing are a class of dimension reduction techniques [1] in which a system identifies, extracts and then summarizes characteristic components of a video as a unique or a set of multiple perceptual hashes or fingerprints, enabling that video to be uniquely identified.

  7. List of image-sharing websites - Wikipedia

    en.wikipedia.org/wiki/List_of_image-sharing_websites

    Legend: File formats: the image or video formats allowed for uploading; IPTC support: support for the IPTC image header . Yes - IPTC headers are read upon upload and exposed via the web interface; properties such as captions and keywords are written back to the IPTC header and saved along with the photo when downloading or e-mailing it

  8. Reverse image search - Wikipedia

    en.wikipedia.org/wiki/Reverse_image_search

    An image search engine is a search engine that is designed to find an image. The search can be based on keywords, a picture, or a web link to a picture. The results depend on the search criterion, such as metadata, distribution of color, shape, etc., and the search technique which the browser uses.

  9. Child abuse image content list - Wikipedia

    en.wikipedia.org/wiki/Child_abuse_image_content_list

    The child abuse image content list (CAIC List) is a list of URLs and image hashes provided by the Internet Watch Foundation to its partners to enable the blocking of child pornography & criminally obscene adult content in the UK and by major international technology companies.