Re: Zeiss paper

[T3D John Bercovitz <bercov@xxxxxxxxxxx>]

> I was just wondering if MT is a specific means of measuring
> contrast and the perhaps contrast function was a similar but not
> truly identical way of measuring contrast.

I think someone said contrast transfer was the same as modulation
transfer and someone else said it used the bars instead of the
sinsusoids.  Beats me.
 
> Any way, I just wish MTF was available, even at the expense of
> resolution data.  At least with MTF you have a meaningful measure
> of contrast at any lpm and calculating the system mtf from the
> components MTFs is straigt forward.

I've never seen how you do this.  I've just multiplied the contrasts
together frequency by frequency.  Is that the right way to do it?

John B


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