Adjusting The Brightness And Contrast - Visioneer PaperPort OneTouch Installation Manual

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To adjust the resolution and sharpness:
1. To use one of the preset resolutions for typical scanned items, click one of the options in the list.
For example, to set the resolution for scanning a business card, select Business Card. That setting is
preset to read small print on a typical business card.
2. To set the resolution manually, drag the Resolution slider to the left to decrease the resolution or to
the right to increase it.
3. To adjust the sharpness, drag the Fidelity slider to the left to decrease the sharpness or to the right to
increase the sharpness.
You can also type a number directly into the sharpness setting box, or click the up and down arrows
next to the box to increase or decrease the setting.
To return the settings to their original amounts, click Reset.
The resolution and sharpen panel also includes an advanced setting for Moire patterns. Moire patterns
are wavy, rippled lines that sometimes appear on the scanned images of photographs or illustrations,
particularly newspaper and magazine illustrations. To scan the image and limit or eliminate the amount
of moire patterns, select the Reduce Moire option.
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DJUSTING THE RIGHTNESS AND
Sometimes an item is scanned with the brightness and contrast set to be too light or too dark. For
example, a note written with a light pencil may need to be scanned darker to improve legibility.
The histogram shows the amount of the image (that is, the number of pixels) at different brightness
levels. From left to right, the histogram indicates dark to light. To see this visually, drag the Brightness
slider back and forth and watch how the distribution of pixels changes to indicate a darker or lighter
image.
The figure on the left shows the brightness and contrast options.
To adjust the brightness and contrast:
1. Drag the Brightness slider to the left to make the item darker or to the right to make the item
lighter.
You can also type a number directly into the brightness setting box, or click the up and down arrows
next to the box to increase or decrease the setting.
2. Drag the Contrast slider to the left to decrease the contrast or to the right to increase the contrast.
The Histogram represents the settings as you drag the sliders.
For color scan configurations you can adjust the brightness and contrast using a single color, or all
together, by choosing from the drop-down menu at the top of the Histogram.
For example, if you select Red from the menu and drag the Brightness and Contrast sliders, you can
see how the red component of the histogram changes. Note, however, that the Green and Blue
components also change relative to those new brightness and contrast settings.
3. Click the Auto button to have the scanner analyze the image and set the appropriate brightness and
contrast.
You can also adjust the brightness and contrast by sampling portions of the image in the preview window.
The three Sampler buttons correspond to the Black, Mid tones, and White portions of an image.
To use the Sampler buttons:
1. Click one of the buttons.
The pointer automatically moves onto the image and becomes a sampler pointer.
2. Place the pointer on the portion of the image for that sample and click.
For example, if you selected the Black sampler button, place the pointer on the blackest part of the
image.
3. Repeat with each of the other Sampler buttons.
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