Spectral imaging has become a topic of growing interest in color-reproduction, remote-sensing, medicalimaging, and other systems. These increased research efforts are likely to propagate into other application areas such as computer vision and pattern recognition. This paper defines, compares, and contrasts spectral imaging and more typical metameric imaging which integrates spectral regions. T...

Many works have shown colorimetric additivity failures in colour-matching experiments. Thus, in the present work, using the colour-matching functions (CMF) of three real observers, we have conducted five experiments in isomeric and metameric matching. The stimuli matched, using two modified Donaldson colorimeters, were two achromatic, one blue, one orange and one green. Afterwards, we determine...

Solid-state white light sources based on multiple light emitting diodes (LEDs) have three features that make them radically different from other sources of electrically generated light. These are the narrowband spectra of the individual LEDs, the possibility of controlling the light output of the individual LEDs and the limited stability of the LED’s colour. These features make it possible to a...

Kirschmann's Fourth Law states that the magnitude of simultaneous color contrast increases with the saturation of the inducing surround, but that the rate of increase reduces as saturation increases. Others since Kirschmann have agreed and disagreed. Here we show that the form of the relationship between simultaneous color contrast and inducer saturation depends on the method of measurement. Fu...

Color correction describes the transformation process between device RGB values and CIEXYZ or CIELAB values. This mapping is in general not unique, because the spectral sensitivities of most of the devices do not satisfy the Luther condition and the acquisition and viewing light sources have a different power spectrum. Therefore, there exists a set of colors with different reflectance spectra w...