Repeats
Repeats increase the number of times that each line of image data is
imaged on the internal CRT (cathode ray tube). This increases expo-
sure time.
When to Use Repeats
As you adjust the PCR II Plus to obtain a brighter image, only so much
can be achieved by lowering the brightness value. At a brightness value
of less than 50, the PCR II Plus cannot produce any more light in the
time it takes to image one line of image data (about 3 milliseconds). At
this point, if you need a brighter image, increase the repeat value. As
on a camera, this increases both the amount of time the line is
scanned and the amount of light exposed onto the film.
Increased Exposure
As the image data comes from the host computer and rasterizer, the
data is scanned by the CRT one line at a time. For most 35mm films,
one pass is sufficient to achieve the correct exposure on film. If one
pass is not sufficient (especially on large format films), you can increase
the repeat value and the image will spend more time on the CRT.
To increase the exposure or brightness of the image by 1 // stop or .30
density units, double the current repeat value and add 1. For exam-
ple, if the current repeat value is 0, increase it to 1; if it is 1, increase
it to 3; if it is 3, increase it to 7. Each time you double the repeat value,
you get an image that is brighter by approximately one // stop, .30
density units, or 30CC.
Color Balance • 6-11
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