attribute |
value |
comments |
when present |
---|---|---|---|
wavelength |
vector of increasing numeric values |
the physical units are always nanometers |
when organization is not 'df.col' |
step.wl |
difference between consecutive values in regular wavelength |
usual values in colorimetry are 1, 5, 10, and 20 nm; but there are others. |
when
wavelength is
regular |
quantity |
a string; for valid values see Table 2.1 |
the quantity determines the type |
always |
specname |
a string; the name of the single spectrum |
|
when organization is 'vector' |
metadata |
<user-defined list> |
unstructured miscellaneous data that the user may find useful |
always |
sequence |
a list of other colorSpec objects |
|
when the object was returned from product() |
calibration |
a list of calibration data |
|
when the object was returned from calibrate() |
Table 5.1 The attributes of a colorSpec object