Prem Rachakonda

Publications

Sources of Errors in Structured Light 3D Scanners

April 16, 2019

Author(s):

Prem K. Rachakonda, Balasubramanian Muralikrishnan, Daniel S. Sawyer

Structured light (SL) scanners have been commercially available for over a decade and some commercial scanners are evaluated using one of two German guidelines...

Metrological Evaluation of Contrast Target Center Algorithm for Terrestrial Laser Scanners

October 26, 2018

Author(s):

Prem K. Rachakonda, Balasubramanian Muralikrishnan, Daniel S. Sawyer

Contrast targets are used with Terrestrial Laser Scanners, typically for long range scanning and registering multiple scans in a scene. These targets are very...

Roles and Responsibilities of NIST in the Development of Documentary Standards

July 27, 2018

Author(s):

Prem K. Rachakonda, Balasubramanian Muralikrishnan, Daniel S. Sawyer

The National Institute of Standards and Technology (NIST) is a non-regulatory federal agency of the Department of Commerce and is the national metrology...

ASTM E3125 Laser Scanner Standard: Challenges and Role of NIST

July 24, 2018

Author(s):

Prem K. Rachakonda

The Dimensional Metrology Group (DMG) at National Institute of Standards & Technology (NIST), along with various other organizations were involved in the...

Software to Determine Sphere Center from Terrestrial Laser Scanner Data per ASTM Standard E3125- 17

July 12, 2018

Author(s):

Prem K. Rachakonda, Balasubramanian Muralikrishnan, Daniel S. Sawyer, Luc Cournoyer

Terrestrial laser scanners (TLSs) are instruments that can measure 3D coordinates of objects at high speed using a laser, resulting in high density 3D point...