Auto contrast can be implemented with existing hardware, it's just a matter of firmware and frames per second. There is no need to radically modify the existing metering system.

Metering systems in DLSRs should expose for the highlights (we don't want them blown out).

When you capture an image, the capture is done at a higher color fidelity than the 8 bits per channel you find in a JPEG. I beleive the D60 uses 12 bit per color. Contrast adjustments affect how the 12 bit per color data is converted to 8 bits per color.

Other than performance issues, there is nothing to prevent the camera from examining the raw capture, evaluating both the highlights and shadows, and deciding on the fly the contrast settings to use for the raw to JPEG conversion. I suspect the D60 already does this with Auto White Balance (I think the AWB is computed on the captured raw image, after the photo has been taken.)


I suspect that photographers who don't like using Auto White Balance, won't want to use auto contrast. Whether or not Auto Contrast is a good idea, is a separate issue from how hard it is to implement.


-MEF
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