(109)
ications for mem
am (1) The Cana-
Society of Photo-
iartered Surveyors,
of Israel, (5) The
¡rammetric Society
) full participation
ss.
resolutions of the
Photography,
lgress has been the
s a test procedure
be compared. The
and indeed made
ut the world,
pecification has by
asure of success by
nd discussion. The
the difficult situa-
lis field so that the
iatisfactory level,
ting a specification
pecification certain
tention to the pos-
uggested for atten-
omplete agreement
camera mountings.
: desirable that the
lependently define
rnational Scientific
reement with those
>n on Optics which
cs.
r Commission I.
Calibrating Photo-
e Illumination, and
ional Reporters be
ontinual review by
)f navigation are in
contact navigation,
and instrument navigational methods, and whereas only a few of these have
been treated briefly during this Congress although they have a great bearing
on the efficiency of aerial survey, therefore be it resolved that: One of the
activities of Commission I shall be the stimulation of a mutual comparison of
navigational methods for aerial photography in the non-military field, with
special regard to the efficiency of these methods for aerial survey.”
INTERNATIONAL SOCIETY OF PHOTOGRAMMETRY
Specification of Methods
of Calibrating Photogrammetric Cameras and
Measuring their Resolution, Image Illumination and Veiling Glare.
For consideration at the September 1952 Meeting of the
International Society of Photogrammetry.
Preamble.
This specification is intended to establish permissable laboratory methods
for determining the optical properties of photogrammetric cameras. To facili
tate consideration and adoption of the specification, it has been kept as short
and as simple as is consistent with adequate exactitude and the subjects covered
have been limited to the four listed in the title.
This specification contains definitions of photogrammetric terms to the
extent that such definitions are required by the purpose of the specification.
Since only the testing of real cameras is dealt with, these definitions are entire
ly technological in form. They do not deal with the mathematical simplifica
tions of photogrammetry nor with the imaginary concept of a perfectly made
camera without manufacturing errors. They define the major properties of a
real camera in the presence of unavoidable manufacturing inaccuracies and
give unambiguous names to the errors produced by these inaccuracies.
Considerable variations in test procedures have been permitted within the
scope of the specification. These variations are certainly undesirable. Elowever,
it must be remembered that this international specification necessarily repre
sents a compromise between various well-established national test procedures.
It seems better to have an international specification with a few alternatives
included than to have no international specification at all. The alternatives
permitted — chiefly in type of resolving power target — represent a conside
rable reduction from all the variations which are currently in use, and their
specification will tend to prevent the development of further variations. The
specification once established will undoubtedly be revised and improved from
time to time and a single procedure will eventually be found suitable.
This specification has been prepared on the assumption that tests will be
carried out under the supervision of scientists experienced in the field of
optical and photographic measurements. Hence, it does not specify the quality
of the equipment which shall be used nor the procedural details necessary to
obtain correct results. A few explanatory and warning notes are included in
the specification where the philosophy or procedure may be unfamiliar in