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Digital BW, The Print

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RE: [Digital BW] Digital, film, scanning comparisons

2003-05-23 by Austin Franklin

Truman,

> In any sensor when one is operating outside the linear dynamic range,
> the sensor is responding nonlinearly to the stimuli.

I don't see how linearity is an issue, as long as it's repeatable and can be
characterized.

> I for example you
> are at the at a signal energy that when broken into three frequency
> components each component will be in the non-linear portion of the
> dynamic range then by recording the energy on the three sensors. This
> will result in different answers for the total energy on the sensor.

But isn't the answer the same given a consistent input?

> In
> a photograph it will most likely result in a loss of detail in one color
> channel or the other and result in distortion in the photograph just the
> same way as one gets distortion in an audio system, an C or X band
> imaging radar when one is trying to operate outside the dynamic range of
> the sensor.

But we're not talking about working outside the dynamic range of the sensor.

> It is important to stay in the linear range.

I disagree.  I deal with non-linear signal processing all the time.  I don't
see this as an issue.

Regards,

Austin

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