olemus
ISO/IEC 19794:
pidevtoonpilt, mis on kodeeritud ainult heleduskomponendiga;
kui heleduskanal on kodeeritud 8 bitiga,
nimetatakse pilti ka monokroompildiks või mustvalgeks pildiks
=
continuous-tone image encoded with one luminance channel
Note. For example, if the luminance channel is coded with 8 bits, the greyscale image is also referred to as a monochrome or black and white image.

näiteid
http://openframeworks.cc/ofBook/images/image_processing_computer_vision/images/lincoln_pixel_values.png

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