Manual Epson expression 1680 pro (page 49 of 147) (English)

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Understanding EPSON TWAIN Pro Features 2-29

Note:

❏ The luminosity value is calculated by the following formula:

0.2R+0.6G+0.2B.

❏ For more information on the Pixel Depth setting, see “Image Type

button” on page 2-6.

Specifying the number of pixels to be sampled

You can choose to sample one pixel at a time, 3

3 pixels at a time,

or 5

5 pixels at a time. To change the number of pixels being

sampled, press the Ctrl and E keys on your keyboard. The square

in the center of the close-up changes size to indicate the amount

of pixels being sampled.

Note:

❏ The values shown for a group of pixels are an average of each pixel’s

values.

❏ In the Configuration dialog box, you can specify the default number

of pixels to be sampled when the Densitometer opens. See

“Densitometer menu” on page 2-23 for instructions.

Using the Preview Buttons

The Preview buttons let you zoom in on selected

portions of the previewed image.

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Epson expression 1680 pro Manual

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