Importance of gun balancing in monitor calibration

Gary W. Meyer

doi:10.1117/12.19701

1 August 1990 Importance of gun balancing in monitor calibration

Gary W. Meyer

Proceedings Volume 1250, Perceiving, Measuring, and Using Color; (1990) https://doi.org/10.1117/12.19701
Event: Electronic Imaging: Advanced Devices and Systems, 1990, Santa Clara, CA, United States

Abstract

The transformation from the RGB primaries of a television monitor to the CIE XYZ color notation system is usually formulated as a three by three matrix applied to a one by three vector. In the general case, however, this is not true because the black point of the monitor gamut is displaced from the origin of CIE XYZ space. An affine transformation is necessary to accomodate this translation of the monitor gamut, and this affine transformation can be reformulated as a four by three matrix times a one by four vector. Balancing the monitor guns so that they maintain the same luminance ratio over their entire dynamic range can minimize the error of assuming a three by three transform when a four by three matrix is actually called for. This procedure also leads to improved calibration for applications where the front panel brightness and contrast controls will be adjusted. The technique of balancing the monitor guns has been employed in the broadcast television industry for many years.1 This paper presents the theory to support the validity of this approach. First, the affine transformation that is necessary to fully characterize the RGB to CIE XYZ transformation is developed. Next, colorimetric errors are identified for balanced and unbalanced monitors when the assumption of a simple three by three matrix transform is made. Finally, the effect on both balanced and unbalanced monitor gamuts of adjusting the front panel brightness and contrast controls is discussed.

Citation Download Citation

Gary W. Meyer "Importance of gun balancing in monitor calibration", Proc. SPIE 1250, Perceiving, Measuring, and Using Color, (1 August 1990); https://doi.org/10.1117/12.19701

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