Oki CX3641 MFP, Technical User Manual

Page: 113 / 146

Scan to E-mail: Contrast
CX3641 Advanced Technical User Guide
113
Contrast
Using the Contrast controls can make detail appear by increasing the
contrast between adjacent gray levels. It adjusts the tonal range of
an image.
•
For decreased contrast in an image — that is, duller whites and
grayer blacks — use a lower number Contrast setting.
•
For increased contrast in an image — that is, brighter whites and
darker blacks — use a higher number Contrast setting.
NOTE:
Remember that the controls adjust the relative contrast of the
entire image.
FIGURE 7-7.
C
ONTRAST
: G
RAYSCALE
E
XAMPLE
Compression Level
Compression algorithms are designed to reduce the size of an image
file without noticeably degrading the image when it is displayed. The
CX3641 lets you set a compression level for digital files:
•
The higher the number, the more the file is compressed. The more
the file is compressed, the smaller the file size.
•
The lower the number, the less the file is compressed. The less
the file is compressed, the larger the file size.
NOTE:
In SendMe, select a compression “quality” instead of a level:
Low, Medium, High, or Maximum. In Scan to E-mail and Scan,
“10” provides the most compression and smallest file size;
“OFF” means the file will not be compressed.
Note that at some point a too-low compression setting can
compromise the quality of images in your digital file — there may be
loss of detail. If you select a higher number and see that images don’t
look right, select a lower compression level and re-scan your original.
SEE THE FOLLOWING
SECTIONS FOR
INFORMATION ON
SETTING CONTRAST:
•
Copy (see “Contrast” on
page 40)
•
Scan to E-mail (see
“Image Quality” on
page 51)
•
Scan (see “Image
Quality” on page 68)
THIS OPTION NOT AVAILABLE IN
THE SENDME AND FAX
FUNCTIONS
GRAYSCALE IMAGE
SCANNED WITH A
HIGHER CONTRAST
SETTING
GRAYSCALE IMAGE
SCANNED WITH A
LOWER CONTRAST
SETTING
ORIGINAL
GRAYSCALE
IMAGE
SEE THE FOLLOWING
SECTIONS FOR
INFORMATION ON
SETTING THE
COMPRESSION LEVEL:
•
Scan to E-mail (see
“Compression Level” on
page 52)
•
Scan (see “Compression
Level” on page 69)
•
SendMe (see “About the
SendMe Digital File Format
Settings” on page 85)
THIS OPTION NOT AVAILABLE IN
THE COPY AND FAX FUNCTIONS