Accurate measurement of
colour is possible with digital imaging systems. New techniques provide
the necessary precise calibration of monochrome and colour digital cameras.
measurement has usually relied upon instruments such as colorimeters.
Colorimeters measure colour accurately over a sample area--the measurement
indicates the "average" colour over the sample area. When the sample has
colour variations within it, important colour information is lost when a
colorimeter is used.
A colorimeter measures
average colour but a digital imaging system gives detailed colour information.
response--average colour over sample area.
True image data used by
digital imaging system.
A digital imaging system
records the colour at thousands, or even millions, of points in the
sample--each pixel records a separate colour measurement. This provides
much more detailed information about the colour of the sample. A digital
image can be used to measure not only the average colour, but also the colour
distribution within the sample.
The benefits of digital imaging can only be realised if the imaging system is
calibrated to produce accurate colour data. Hamey Vision Systems are
experienced in using digital imaging systems for accurate colour measurement.