Adaptive lens shading correction.pdf
需积分: 0 22 浏览量
2019-09-20
09:39:08
上传
评论 4
收藏 2.59MB PDF 举报
US008228406B2
(12)
Unlted
States
Patent
(10)
Patent
N0.2
US
8,228,406
B2
Ku0
et
al.
(45)
Date
of
Patent:
Jul.
24,
2012
(54)
ADAPTIVE
LENS
SHADING
CORRECTION
6,542,198
B1
4/2003
Hung
et
a1.
6,597,395
B1
7/2003
Kim
et
a1.
.
- -
.
6,618,508
B1
9/2003
Webb
et
a1.
(75)
Inventors‘
gaYld
Démmsg
K310’
sagio?’scé
ms)’
6,627,254
B1
9/2003
Angelo
et
31.
“It?”
_“°;
an
0S6’
_(
)’
ay
6,642,068
B1
11/2003
Hayes
et
a1.
Davld
ZIPIIICk,
Morgan
H111,
CA
(Us);
6,686,925
B1
2/2004
Cappels
Ting
Chen,
Sunnyvale,
CA
(US);
Sumit
6,687,295
B1
2/2004
Webb
et
a1.
Chawla
San
Carlos
CA
(Us)
6,707,459
B1
3/2004
Graves
et
a1.
’ ’
6,714,720
B1
3/2004
Lightstone
et
a1.
. .
6,746,754
B1
6/2004
W
t
l.
(73)
Ass1gnee:
Apple
Inc.,
Cupert1no,
CA
(US)
6,864,042
B1
3/2005
K321262110
_ _ _ _ _
6,866,883
B2
3/2005
Wang
et
a1.
(
*
)
Not1ce:
Subject
to
any
d1scla1mer,
the
term
of
th1s
6,878,426
B2
4/2005
Angelo
@131,
patent
is
extended
or adjusted
under
35
(Continued)
U.S.C.
154(b)
by 230
days.
FOREIGN
PATENT
DOCUMENTS
(21)
App1.N0.:
12/794,632
EP
1962517
A1
8/2008
(22)
Filed:
Jun.
4,
2010
(Continued)
(65)
Prior
Publication
Data
OTHER
PUBLICATIONS
US
2011/0298944
A1
Dec.
8,
2011
US.
Appl.
No.
12/794,642,
?led
Jun.
4,
2010,
Ting
Chen.
(51)
Int.
Cl.
(Continued)
H04N
9/64
(2006.01)
_ _
(52)
us.
Cl.
......................................
..
348/251;
382/274
Pr’mry
Examlw
*
Jason
Chan
(58)
Field
of
Classi?cation
Search
.............
..
348/2221,
ASS/Sm"!
Exam/"er
*
Gary
C
Vleaux
348/251;
382/167,
274
(74)
Attorney,
Agent,
or
Firm
*
Fletcher
Yoder
PC
See
application
?le
for
complete
search
history.
(57)
ABSTRACT
(56)
References
Cited
U.S.
PATENT
DOCUMENTS
Systems,
methods,
and
devices
for
applying
lens
shading
correction
to
image
data
captured
by
an
image
sensor
are
provided.
In
one
embodiment,
multiple
lens
shading
adapta
5’008’739
A
4/1991
D’Luna
et
31'
tion functions,
each
modeled
based
on
the
response
ofa
color
5,512,961
A
4/1996
Cappels,
Sr.
. . . .
5
714 207
A
21998 Kuo
channel
to
a
reference
1llum1nant,
are
prov1ded.
An
1mage
537143842
A
2/199g
Krause
et
a1,
frame
from
the
image
data
may
be
analyzed
to
select
a
lens
5,853,820
A
12/1998
Kuo
et
a1.
shading
adaptation function
corresponding
to
areference
illu
5361496
A
1/1999
K110
et
a1~
minant
that
most
closely
matches
a current
illuminant.
The
g1
5:71;;
dale't
31
selected
lens
shading
function
may
then
be
used
to
adjust
a
set
6,327,641
B1
12/2001
Xiao
et
a1.
Oflens
Shadlng
Parameters
6,370,273
B1
4/2002
Kuo
6,400,471
B1
6/2002
Kuo
et
a1.
26
Claims,
24
Drawing
Sheets
272-
124
\
.
,
a
.
2 .
.
.
.
. a
.
2
.
. .
.
.
. .
2
.
u
v .
.
.
. .
.
u
v
v
.
.
.
.
. u
v
u
,
[.-
.
.
.
. u
,
a
.
. .
.
.
. ,
a
.
2
. .
.
E
HARDWARE
PIPELINE
134
r125 r128 r130 r132
,
["18
1
BLACK LENS
SHADING
WHlTE
DEMGSNCI
E
DlSPLAY
;
LEVELCOMP.
CORRECHON
BALANCE
1.0010
|
E E
DEVlCE
i
11
.
“
K14
“
MEMORY
I
剩余39页未读，继续阅读
资源评论
