US 2011/0032337 A1Published application

Method and camera for the real-time acquisition of visual information from three-dimensional scenes

AssigneeUniversidad De La Laguna

InventorsJosé Manuel Rodríguez Ramos, José Gil Marichal Hernández, Fernando Rosa González, Fernando Pérez Nava

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Abstract

The invention relates to a method for calculating the focal stack associated with an object space from the plenoptic function thereof, using a sum transform along the length of constrained planes in discrete hypercubes, which allows the computing time to be considerably reduced. The invention also relates to a method for increasing the resolution of the focal stack obtained. In addition, the invention relates to two methods for the real-time recovery of the depths and moduli and phases of the complex amplitude of the wavefront respectively in each position of the surfaces of a three-dimensional scene and to a system adapted for carrying out the aforementioned methods.

Claims10

Dependent claims

A method for calculating a focal stack associated with an object space from the discrete plenoptic function thereof, f(s,t,j,k), which comprises evaluating the photographic formation integral as a sum along the length of planes in a 4D hypercube, said evaluation of the photographic formation integral in turn comprising the following steps:

at the start of the computation, making the captured data, f(s,t,j,k), be equal to the transformed data up to step 0,
f
~
0

(
r
,
s
,
t
,
j
,
k
)
,
i
.
e
.
:

j
x
0

(
r
,
s
,
t
,
j
,
k
)
=
f
(
s
,
t

2


n
,
j
,
k
)
;
and then applying n=log2 N times the following partial transformation:
f
~
m
+
1
(
r
0
,
…

,
r
m
-
1

ρ
:
m


bits

r
:
m
+
1


bits
,
r
m
,
s
m
+
1
,
…


s
n
-
1

s
:
n
-
m
-
1


bits
,
t
m
+
1
,
…

,
t
n
-
1

t
:
n
-
m
-
1


bits

2


n
-
m
-
1


bits
,
j
,
k
)
=
f
~
m

(
ρ
,
0
,
s
,
0
,
t
,
j
,
k
)
+
f
~
m

(
ρ
,
1
,
s
,
0
,
t
,
j
+
r
m
+
λ

(
ρ
)
,
k
)
+
f
~
m

(
ρ
,
0
,
s
,
1
,
t
,
j
,
k
+
r
m
+
λ

(
ρ
)
)
+
f
~
m

(
ρ
,
1
,
s
,
1
,
t
,
j
+
r
m
+
λ

(
ρ
)
,
k
+
r
m
+
λ

(
ρ
)
)

269 more elements

Dependencies are inferred from the claim text.