A signal value representing at least one of a plurality of types of optical characteristics are calculated for each pixel from the read signal obtained and output by reading light reflected by a document placed on a document table and a document table cover while the document is covered with the cover. It is determined, based on the signal value calculated, whether or not a target pixel is a pixel in a document region. A document region is detected from the determination result.

Claims

13 · 2 independent · depth 3

13 granted claims

›1.independentAn apparatus comprising:nan obtaining unit configured to obtain a read image which has a first area corresponding to an original placed on an original…+10

›2.↳ 1The apparatus according to claim 1, wherein the specification unit specifies, in an area of the read image, the signal value corresponding to each of …d2+2

›3.↳ 1The apparatus according to claim 1, wherein the signal value corresponds to a R signal or a G signal, andnwherein said determination unit determines t…d2+1

›4.↳ 1The apparatus according to claim 1, wherein color of a surface of the cover which covers the original table includes white.d2

›6.↳ 1The apparatus according to claim 1, wherein the determination unit determines, by one pixel of the read image, whether a pixel is to be included in th…d2

›11.↳ 1The apparatus according to claim 1, wherein the determination unit determines the first area by comparing two signal values corresponding to color com…d2

›12.↳ 1The apparatus according to claim 1, wherein the determination unit determines the first area based on a large or small relation of two signal values c…d2

›13.↳ 1The apparatus according to claim 1, further comprising a reading unit configured to read the original placed on the original table of the apparatus;nw…d2

›7.independentA method comprising:nan obtaining step of obtaining a read image which has a first area corresponding to an original placed on an original table and a…+1

Classifications

17 codes

IPC · International Patent Classification

Section G — Physics

G06K9/20
G06K15/00
G06K9/46
G06K9/48
G06K9/50

Section H — Electricity

H04N1/00
H04N1/04
H04N1/38
H04N1/387
H04N1/46

USPC · US Patent Classification

358/474358/3.1358/1.18382/197382/201382/195382/190

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2.0 y

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non-final + final

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Examiner

Rury Grisham

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Type	Document	Date
related publication	US 20130100504 A1	25 Apr 2013

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