Demo Images

HDRC^® Color Constancy

We perceive the color of a rose as orange in bright sunlight as well as in a dimly lit room. This phenomenon of color constancy is demonstrated by the following frames of the Macbeth^® color checker taken with a color HDRC^® camera at 30 frames/s with 4 apertures that are 7 f-stops apart. In spite of severe under- to severe over-exposure, the image information contents are recorded perfectly by the HDRC^® sensor, although the primary images on the left do not show this. However, after just adding the appropriate log-luminance offset, all frames show the chart as we like to see it.

Dynamic range, color constancy and backlighting performance of the HDRC camera are shown in this more challenging scene (as far as it is printable).
This is the direct image with just the operations explained above.

For comparison, the digital CCD camera has reached its limits in spite of its advantage in resolution and of all its post-processing power.
(A film cannot handle this scene either).