Optical see-through displays are an established technology within augmented reality. Wearing such a display the users eyes automatically adapt to the luminance of the real world environment, while the virtual part is displayed using a steadybrightness. This often results in clear differences between real and virtual elements. This paper shows a technique for colorimetric compensation which avoids this effect. Furthermore algorithms for photometric compensation will be demonstrated. The appearance of background shapes and colours arise from the combination of the luminance of the background and the projected luminance of the object. These "ghosts" are photometrically compensated.

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