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Modality

  • In language, modality is the subject concerning so-called "modal verbs" like can, must, and should, that are customarily used to modify the meaning of other verbs (which in turn tend to take the infinitive). Modal verbs express possibility (and impossibility, necessity, contingency, etc.), permissibility (and obligation, proscription, etc.), probability (and improbability, etc.). See grammatical mood.
  • In computer science and particularly computer vision, modality refers to the type of input. That is, black-and-white, color and infrared are three different modalities for the acquisition of an image.
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