Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
71 words
An exposure control method for a digital input device,
comprising the steps of: collecting a histogram [210] for a scanned line [200] on a medium; using the histogram collected for the scanned line to estimate the
reflectance of the medium [250] and thereby align an estimated tone gamut of
the medium to the dynamic range of the digital input device to generate a tone
response curve [260] during a single scan.
Claim 2
Dependent Claim
27 words
The method as set forth in claim 1, further comprising the step
of updating a cumulative histogram [230] based upon the histogram collected
for the scanned line.
Claim 3
Independent Claim
40 words
The method as set forth in claims 1 or 2, wherein the histogram
[230] collected for the scanned line is used to estimate the reflectance of the
medium indirectly by revising an estimation based upon the updated
cumulative histogram [230].
Claim 4
Independent Claim
28 words
The method as set forth in claims 1, 2 or 3, wherein the step of
estimating the reflectance [250] of the medium is performed for
predetermined scanned lines.
Claim 5
Independent Claim
29 words
The method as set forth in claims 1, 2 or 3, wherein the step of
estimating the reflectance [250] of the medium is performed for randomly
determined scanned lines.
Claim 6
Independent Claim
36 words
The method as set forth in claims 1, 2, 3, 4 or 5 wherein the
step of estimating the reflectance [250] of the medium includes determining
an average tone value [420] within the cumulative histogram [230].
Claim 7
Independent Claim
38 words
The method as set forth in claims 1, 2, 3, 4, 5 or 6, wherein the
step of estimating the reflectance [250] of the medium includes determining
an average tone deviation value [430] within the cumulative histogram [230].
Claim 8
Independent Claim
41 words
The method as set forth in 1, 2, 3, 4, 5, 6 or 7 wherein the step
of estimating the reflectance of the medium includes determining an average
tone value [420] for a particular color channel within the cumulative
histogram [230].
Claim 9
Independent Claim
43 words
The method as set forth in 1, 2, 3, 4, 5, 6, 7 or 8, wherein the
step of estimating the reflectance of the medium includes determining an
average tone deviation value [430] for a particular color channel within the
cumulative histogram [230].
Claim 10
Dependent Claim
28 words
An exposure control apparatus for a digital input device, the
apparatus employing the method set forth in claims 1, 2, 3, 4, 5, 6, 7, 8 or 9.