C*Pix SDC2000 Instrukcje Operacyjne Strona 222

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4.6 Sharp Menu SDC 2002
4-136
Operating Instructions - Rev. 1 / 6.2003
4.6.2 SUBMENU “APERTURE”
1
Fig. 433: Main menu “Sharp” / submenu “Aperture”
Overview
Main menu “Sharp” / submenu “Aperture”
Aperture adjustment serves to adjust gain, peak and coring of the aperture and
compensates system dependent frequency responses of the CCD sensors and the
optics.
Function Buttons, Controls & Displays
FILM APERTURE
ADJUSTMENT
Gain
Gain adjustment of the aperture correction.
For optimum adjustment, coring should be set first to 0%.
Peak
Adjustment of the peak frequency of the aperture enhancement.
Set Unity for optimum aperture correction!”
In Unity, the film related correction of the aperture ( f
Nyquist
~39 linepairs/mm
for 35mm films) is set to optimum linear scanner response:
>6.6 MHz (outband range) for SDTV
>36 MHz (outband range) for HDTV
Coring
Reduces the aperture enhancement for fine low contrast details like film grain.
The standard value 0% applies the selected amount of aperture enhancement
to all details.
At 100% only very high contrast details are enhanced.
To change the setting, slide on the touchscreen or use the digipot control.
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