principal point


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prin·ci·pal point

one of two points on an optic axis so related that an object at one is exactly imaged at the other without magnification, minification, or inversion.

prin·ci·pal point

(prin'si-păl poynt)
One of two points on an optic axis so related that an object at one is exactly imaged at the other without magnification, minification, or inversion.

principal point

One of two points so situated that the optical axis is cut by the two principal planes.
See also: point
References in periodicals archive ?
The figure's eye is also aligned, in accordance with Alberti's principles, with the intended principal point. It is a convenient way of literalizing the actual viewpoint, off to the side of the image.
Primary health care, he says, played a vital role not only in providing access to free health care at the point of service, but also as a principal point of interaction for individuals within the healthcare system, he added.
Le premier, annonce a plusieurs reprises par le gouvernement, constituera le principal point de depart permettant de profiter des programmes sociaux.
Talking about a letter he received from former Serie A boss, Marco Brunelli, last year al-Obaidly said: "Although the letter suggests that Serie A has been at the forefront of the fight against piracy, the letter does not once address our principal point -- that being beoutQ, the most sophisticated pirate operation the world has ever seen, which is backed by Saudi Arabia."
Speaking about the relationship with the Walkers, Neil said: "One of the longest partnerships has been with Jim Walker, so long in fact that it is now his sons Michael and Stuart that are the principal point of contact.
A key benefit of this project is providing high quality at the principal point of face to face contact with our customers.
"A lot has been made of modern day football social schemes and I wanted to explore the topic with the principal point for consideration being whether there is a genuine integrity, authenticity and goodwill in the apparent altruism of modern football, or whether this is just a sinister disguise to mask the excesses of the modern game; a cynical counter-balance to it decadence and disconnection from those who stimulate its commercial success.
Here, f is the focal length, o is the principal point with the image coordinates of ([X.sub.o], [y.sub.o]), and [DELTA]r and [DELTA]p denote the radial lens distortion and the decentering lens distortion, respectively.
Whereas, the intrinsic parameters are the internal characteristics of camera such as focal length, principal point and skew coefficient.
He will also serve s the principal point of contact for the Commission on all matters pertaining to the Department of Homeland Security, and be charged with developing emergency programs covering service provision by wireless and wireline telecommunications carriers and broadcast, cable, and satellite facilities, as well as radio frequency assignment, investigation, and enforcement.
She is also the principal point of contact between iPlace clients and the MSP.
"Assigned Green Ambassadors will be responsible for coordinating waste management activities, educating colleagues and will serve as the principal point of contact between RAKTDA and WMA.

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