olemus
ISO/IEC 15948, ISO/IEC 17823:
kujutise esitus, milles iga piksel on määratud
üheainsa värvusteabeüksusega,
mis väljendab üldist heledust astmikul mustast valgeni
= image representation in which each pixel is defined by a single sample of colour information, representing overall luminance (on a scale from black to white)

ISO/IEC 19794 (biomeetria):
pidevtoonpilt, mis on kodeeritud ainult heleduskomponendiga
= continuous-tone image encoded with one luminance channel

näiteid
https://duckduckgo.com/?q=%22grayscale%22+scale&t=h_&iar=images&iax=images&ia=images

https://i.ytimg.com/vi/Tq2o7QwQ10w/maxresdefault.jpg

https://orig00.deviantart.net/ed5b/f/2013/221/e/0/grayscale_to_color_painting_tutorial_by_feavre-d6he286.jpg

ülevaateid
https://en.wikipedia.org/wiki/Grayscale