US 10,762,612 B2Granted

Method and an apparatus for generating data representative of a pixel beam

AssigneeInterDigital CE Patent Holdings, SAS

InventorsLaurent Blonde, Valter Drazic, Mozhdeh Seifi

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Abstract

There are several types of plenoptic devices and camera arrays available on the market, and all these light field acquisition devices have their proprietary file format. However, there is no standard supporting the acquisition and transmission of multi-dimensional information. It is interesting to obtain information related to a correspondence between pixels of a sensor of said optical acquisition system and an object space of said optical acquisition system. Indeed, knowing which portion of the object space of an optical acquisition system a pixel belonging to the sensor of said optical acquisition system is sensing enables the improvement of signal processing operations. The notion of pixel beam, which represents a volume occupied by a set of rays of light in an object space of an optical system of a camera along with a compact format for storing such information is thus introduce.

Claims13

Dependent claims

A computer implemented method for generating a set of data representative of a volume, in an object space of an optical acquisition system, occupied by a set of rays of light passing through a pupil of said optical acquisition system and a conjugate of at least one pixel of a sensor of said optical acquisition system said volume occupied by said set of rays of light being called a pixel beam, comprising:

generating a set of data representative of the pixel beam
computing a first rotation angle of a first straight line describing a surface of a hyperboloid of one sheet representing the pixel beam, called first generating ray, around a second straight line being a revolution axis of the hyperboloid, said rotation transforming the first generating ray into a second generating ray crossing a reference straight line,
computing a second rotation angle of a third straight line describing the surface of the hyperboloid, called third generating ray, around the revolution axis of the hyperboloid, said rotation transforming the third generating ray into a fourth generating ray crossing the reference straight line, computing a distance between one of the second or the fourth generating ray and the revolution axis of the hyperboloid,
said set of data comprising the parameters representative of the second generating ray, parameters representative of the fourth generating ray and the distance between one of the second or the fourth generating ray and the revolution axis of the hyperboloid.

1 more element

An apparatus for generating a set of data representative of a volume, in an object space of an optical acquisition system, occupied by a set of rays of light passing through a pupil of said optical acquisition system and a conjugate of at least one pixel of a sensor of said optical acquisition system said volume occupied by said set of rays of light being called a pixel beam, said apparatus comprising a processor configured to:

generate a set of data representative of the pixel beam by:
computing a first rotation angle of a first straight line describing a surface of a hyperboloid of one sheet representing the pixel beam, called first generating ray, around a second straight line being a revolution axis of the hyperboloid, said rotation transforming the first generating ray into a second generating ray crossing a reference straight line,
computing a second rotation angle of a third straight line describing the surface of the hyperboloid, called third generating ray, around the revolution axis of the hyperboloid, said rotation transforming the third generating ray into a fourth generating ray crossing the reference straight line, computing a distance between one of the second or the fourth generating ray and the revolution axis of the hyperboloid,
said set of data comprising parameters representative of the second generating ray, parameters representative of the fourth generating ray and the distance between one of the second or the fourth generating ray and the revolution axis of the hyperboloid.

1 more element

Dependencies are inferred from the claim text.

Facts

Application: 16/067,260Filed 29 Dec 2016
Priority: EP 1530717430 Dec 2015
Published: US 2019/0295232 A126 Sep 2019
Granted: 1 Sep 2020
Term ends: Not estimatedThe source records don’t support an estimate.

Classification7 codes

G06T 5/50
Image enhancement or restoration: using two or more images, e.g. averaging or subtraction
G06T 15/06
Three-dimensional [3D] image rendering: ray-tracing
G06T 15/506
Lighting effects: illumination models
G06T 19/20
Manipulating three-dimensional [3D] models or images for computer graphics: editing of three-dimensional [3D] images, e.g. changing shapes or…