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(Values under 0 in [ ] are omitted.)
3.
Conditions for vertical scanning:
1
[YR x L/1200] - 6968 (for flat-bed scan)
1
[YR x L/1200)
(Values under 0 in [ ] are omitted.)
(h) Brightness: Byte 16
Specifies the brightness for half-tone monochrome output. For multibit output, this scanner ignores this
field. On this scanner, brightness is variable to seven levels as shown in the following table.
Value
00
00 to 1F
20 to 3F
40 to5F
60 to 7F
80 to 9F
A0 to BF
C0 to DF
E0 to W
Threshold:
(i)
Byte 17
Specifies the threshold value
A value other than 0 indicates a relative brightness, where the darkest value is at X'FF', the
,
X'01'
and the normal (ordinary) value is at X'80'.
at
This scanner is limited to 64 levels of brightness. Internally, this scanner excludes X'00' and ignores the
bits. (X'00' represents Dynamic Threshold; X'01' to X'03' are the darkest.
(j) Contrast: Byte
18
If a value other than X'00' is specified, this scanner returns the following error:
• Status: B'0000l' (CHECK CONDITION)
• Sense key:
(ILLEGAL REQUEST)
X'5'
(k) IMAGE COMPOSITION:
type of image to be read. The following values are supported by this scanner:
Specifies the
X'00': Binary monochrome
X'0l': Dithered monochrome
X'02': Gray scale
X'03': bi-level RGB color
X'04': Dither RGB color
X'05': Multi-level RGB color
If a value X'03' or greater is specified, this scanner returns the following error:
Status: B'00001' (CHECK CONDITION)
8400 (for ADF scan)
Table 4-17
Brightness
Remarks
Same as 80 to
-
Brighter
Digitized
Darker
for use in digitizing multivalued image data. A 0 value causes auto digitization.
Byte 19
4-37
9F range (with built-in dither)
brightest value is
lowest two
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