Browse Definitions:
Definition

light field photography

Contributor(s): Ivy Wigmore

Light-field photography (also known as plenoptic photography) is an imaging technology that makes it possible to adjust the focus in an existing picture. Unlike conventional images, any area in an image taken with a light-field camera can be brought into focus to make a particular feature sharper or make details of a particular area more visible.

In photography, focus works similarly to how it works in the human eye: When you focus on one part of a scene, that part is clear but everything else is slightly blurred. In conventional photography, image focus is selected before the picture is taken and that focus is fixed in the resulting image. In light-field photography, all the information required to focus on any part of a scene is recorded and stored with the digital image. Clicking on a given area in an image taken with a light-field camera is like looking directly at objects in a scene in front of you: The area you click on becomes clearer while other areas in the scene are less distinct; if you click on a different point, the new area becomes clear while the area you were focused on before it blurs.

Click on different areas in the image to refocus.

The totality of light (photons) traveling within a given scene, through any point in space and in any direction, is known as the light field. Light field photography captures and records information about the light field as it interacts with physical objects in a scene. Leonardo da Vinci explained the concept behind light-field photography back in the fifteenth century. In his manuscripts on painting, Leonardo wrote about the existence of complete information at any point where light can be seen to travel from a given perspective. He described these points of light as “radiant pyramids” interweaving throughout the air without interfering with each other and said that “the semblance of a body is carried by them as a whole into all parts of the air, and each smallest part receives into itself the image that has been caused.” The basic idea is that the light arriving at any point within a scene has all the information required to recreate any view available from that perspective.

This was last updated in June 2012

Continue Reading About light field photography

Start the conversation

Send me notifications when other members comment.

By submitting you agree to receive email from TechTarget and its partners. If you reside outside of the United States, you consent to having your personal data transferred to and processed in the United States. Privacy

Please create a username to comment.

-ADS BY GOOGLE

File Extensions and File Formats

SearchCompliance

  • internal audit (IA)

    An internal audit (IA) is an organizational initiative to monitor and analyze its own business operations in order to determine ...

  • pure risk (absolute risk)

    Pure risk, also called absolute risk, is a category of threat that is beyond human control and has only one possible outcome if ...

  • risk assessment

    Risk assessment is the identification of hazards that could negatively impact an organization's ability to conduct business.

SearchSecurity

  • security information and event management (SIEM)

    Security information and event management (SIEM) is an approach to security management that seeks to provide a holistic view of ...

  • polymorphic virus

    A polymorphic virus is a harmful, destructive or intrusive type of malware that can change or 'morph,' making it difficult to ...

  • cyberterrorism

    According to the U.S. Federal Bureau of Investigation, cyberterrorism is any 'premeditated, politically motivated attack against ...

SearchHealthIT

  • accountable care organization (ACO)

    An accountable care organization (ACO) is an association of hospitals, healthcare providers and insurers in which all parties ...

  • patient engagement

    Patient engagement is an ideal healthcare situation in which people are well-informed about -- and motivated to be involved -- in...

  • personal health record (PHR)

    A personal health record (PHR) is a collection of health-related information that is documented and maintained by the individual ...

SearchDisasterRecovery

  • business continuity and disaster recovery (BCDR)

    Business continuity and disaster recovery (BCDR) are closely related practices that describe an organization's preparation for ...

  • business continuity plan (BCP)

    A business continuity plan (BCP) is a document that consists of the critical information an organization needs to continue ...

  • call tree

    A call tree -- sometimes referred to as a phone tree -- is a telecommunications chain for notifying specific individuals of an ...

SearchStorage

SearchSolidStateStorage

  • hybrid hard disk drive (HDD)

    A hybrid hard disk drive is an electromechanical spinning hard disk that contains some amount of NAND Flash memory.

Close