Minimizing the effects of threshold setting errors, detection, shading, and noise errors in fringe patterns

Jerzy M. Woznicki; Grzegorz Kukielka

doi:10.1117/12.276328

17 July 1996 Minimizing the effects of threshold setting errors, detection, shading, and noise errors in fringe patterns

Jerzy M. Woznicki, Grzegorz Kukielka

Author Affiliations +

Proceedings Volume 2860, Laser Interferometry VIII: Techniques and Analysis; (1996) https://doi.org/10.1117/12.276328
Event: SPIE's 1996 International Symposium on Optical Science, Engineering, and Instrumentation, 1996, Denver, CO, United States

Abstract

This paper presents an overview of methods of error elimination during image processing and analysis, and more specially ofthe problems ofsetting the threshold errors, shading and noise. Of all the steps involved in measuring objects in an image, setting the threshold is the one which should be considered most careftilly. There are described following errors: threshold setting error, the offset threshold error, "halo" error and elimination methods. The process of setting the detection level should be standardised, whichever technique is adopted, and some form of check on a standard specimen should be incorporated into the image analysis routine if at all practicable. Shading is the best dealt with by using a shading correction step in the image processing, but operator can help by ensuring that illumination system of microscope for example is correctly centred, that specimen is flat, that the lamps on macroviewer all have the same wattage and are at the same distance from the specimen. Shading can be asymmetrical, and it can be present in the specimen itself as well as being introduced in the optical system. Noise is a function of system design, with no room for operator of the system to affect it, except by increasing the gain of the video amplification. Noise is minimised by operating the system at the optimum conditions of incident lighting.

Citation Download Citation

Jerzy M. Woznicki and Grzegorz Kukielka "Minimizing the effects of threshold setting errors, detection, shading, and noise errors in fringe patterns", Proc. SPIE 2860, Laser Interferometry VIII: Techniques and Analysis, (17 July 1996); https://doi.org/10.1117/12.276328

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available

Members: $17.00

Non-members: $21.00 ADD TO CART

PROCEEDINGS
7 PAGES

DOWNLOAD PAPER SAVE TO MY LIBRARY

GET CITATION

RIGHTS & PERMISSIONS

Get copyright permission Get copyright permission on Copyright Marketplace

KEYWORDS

Image analysis

Error analysis

Image processing

Fringe analysis

Binary data

Microscopes

Video

Show All Keywords

Keywords/Phrases

Search In:

Publication Years