Tat-get-based cltaracterization measurement can be achieved by using a reference
target that contains a certain number of colors with known standard tristimulus XYZ
values as provided with the color target or measured from spectrophotometer. Then,
these standard colors are captured by a digital camera to obtain the RGB values before
corresponding to tlle ln this research, the target-based characterization is used
since this method requires only a known target; hence, it is a more practical method.
2.6.3 Color Transformation
In order to transform the digital camera ROB values to XYZ values. the typical
methods like three-dimensional lookup tables with interpolation and extrapolation
(Pascale, 2003},