Color checker chart
Some more examples of the MacBeth Color Checker chart, but with wrong, some extremely so, white balance settings in the camera.
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Fig. 8: Nikon D200 images with wrong white balances, before (top row) and after (bottom row) calibration. From left to righ: CIE D65 lighting and CIE A white balance, TL84 lighting and CIE A white balance, TL84 lighting and CIE D65 white balance, CIE A lighting and CIE D65 white balance. Note that for the first image image we had to use a -1 exposure bias to avoid saturation of the blue channel in too many patches. This, however did not work for the last image, where many patches were saturated in the red channel.
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Fig. 9: Canon 10D images with wrong white balances, before (top row) and after (bottom row) calibration. From left to righ: CIE D65 lighting and CIE A white balance, TL84 lighting and CIE A white balance, TL84 lighting and CIE D65 white balance, CIE A lighting and CIE D65 white balance. The last case could not be calibrated because too many patches were saturated in the red color channel, even with a -1 stop exposure bias.
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Some more examples of the MacBeth Color Checker chart, with different exposure bias settings.
From these examples it is clear that it is always better to (slightly) underexpose than to overexpose!
Medical
Some examples of skin imaging.