IBM Ricoh ImageReader FB 2400 dpi - Manual (Page 16)

Flip Flip Flip Flip Flip
This command creates a mirror image of the item scanned.
In In In In Inv v v v ver er er er erse se se se se
This command reverses an image’s display. Black pixels will be white, and white pixels will become black. The
resulting image is like a photo negative of the original.
Brightness and Contrast Brightness and Contrast Brightness and Contrast Brightness and Contrast Brightness and Contrast
These controls adjust the brightness and contrast of the image you are about to scan. Increasing the contrast will sharpen
the image, but cause it to look dark. Increase the brightness to lighten the image and compensate for the contrast
selection. Experiment with these controls to determine the look you prefer. Usually these controls are adjusted together
in a 2:1 ratio of brightness to contrast.
Cur Cur Cur Cur Curv v v v ves es es es es
The curves function allows you to alter the way different pixel values in your image are adjusted. The diagonal line
shows a Gamma function of input to output pixel values. The default is a straight line, which makes no adjustments to
the pixels. All the pixels that fall below the line are darkened, and those above the line are lightened. The four buttons
in the lower left corner make automatic adjustments for types of images and documents. Use the lower right button for
hazy images, the upper right button for high contrast images, and the lower left button for normal images. The upper left
button restores the curve to its default setting.
Le Le Le Le Lev v v v vels els els els els
This function displays a histogram of the number of pixels in the image with different values (representing different
colors). The left side represents black, and the right side represents white or solid colors such as red, green or blue. The
histogram is then broken into 256 channels. The left and right numbers above the histogram show the channel numbers,
and the middle number expresses the ratio of channels to the left and to the right of the middle triangle below the
histogram. The shaded slider bar beneath the histogram is the output level control. Slide the left and/or right triangles
inward to give you more channels in regions where pixels are grouped in greater
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