Browse Definitions :

BACKGROUND IMAGE: iSTOCK/GETTY IMAGES

This content is part of the Essential Guide: Enterprise 3D printing tutorial: CIO challenges and advice
Definition

single-image random-dot stereogram (SIRDS)

A single-image random-dot stereogram (SIRDS) is a set of printed or displayed dots that appear to form a three-dimensional ( 3D ) scene when viewed close-up with the eyes focused at infinity. Sometimes text characters are used in place of dots; then the composite is called a single-image random-text stereogram (SIRTS).

Viewing a SIRDS or SIRTS involves deceiving the eye-and-brain mechanism. The scheme does not work for everyone. Deliberate defocusing can cause eye strain in some people. The trick is to position the SIRDS or SIRTS 12 to 18 inches (30 to 45 centimeters) away from your eyes, look momentarily at something far away, and then look back at the image again. The image can be moved alternately closer to, and farther from, your eyes, until adjacent sets of dots or characters overlap in the lines of sight. Alternatively, you can try looking at the image cross-eyed.

An optical instrument consisting of prisms or mirrors can force your left and right eyes to look at adjacent sets of dots in a SIRDS or SIRTS. This works for almost everyone and reduces the risk of eye strain.

This was last updated in March 2011

Dig Deeper on Multimedia and graphics

Start the conversation

Send me notifications when other members comment.

Please create a username to comment.

-ADS BY GOOGLE

File Extensions and File Formats

SearchCompliance

  • risk management

    Risk management is the process of identifying, assessing and controlling threats to an organization's capital and earnings.

  • compliance as a service (CaaS)

    Compliance as a Service (CaaS) is a cloud service service level agreement (SLA) that specified how a managed service provider (...

  • data protection impact assessment (DPIA)

    A data protection impact assessment (DPIA) is a process designed to help organizations determine how data processing systems, ...

SearchSecurity

  • Port Scan

    A port scan is a series of messages sent by someone attempting to break into a computer to learn which computer network services ...

  • DMZ (networking)

    In computer networks, a DMZ (demilitarized zone), also sometimes known as a perimeter network or a screened subnetwork, is a ...

  • quantum supremacy

    Quantum supremacy is the experimental demonstration of a quantum computer's dominance and advantage over classic computers by ...

SearchHealthIT

SearchDisasterRecovery

  • business continuity plan (BCP)

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

  • disaster recovery team

    A disaster recovery team is a group of individuals focused on planning, implementing, maintaining, auditing and testing an ...

  • cloud insurance

    Cloud insurance is any type of financial or data protection obtained by a cloud service provider. 

SearchStorage

Close