XIII Congress of the
International Society for Photogrammetry
Helsinki, 1976
Commission V
Working Group V/3
Invited Paper
JEAN-PAUL AGNARD, Inc, M.Sc.
Laval University
Quebec, Canada
Canadian Contribution to
Hologrammetry
Research in hologrammetry since 1969, and future directions
in research, are discussed
I 1967, AN ARTICLE in the French scientific
review Sciences et Vie came to my atten-
tion as to many readers. Having taken the first
courses in photogrammetry, it became evi-
dent immediately upon reading the first few
linesofthisarticle that holography would one
research work: “I want to mention these ex-
periments because they directly interest
photogrammetry and I regret being unable to
fix the tolerance between the positioning of
the object and its image reconstructed by
holography. This question has been asked of
ABSTRACT: À review is made of the research we have undertaken since
1969 in hologrammetry. Discussion on the directions we think holo-
grammetric research will take is emphasized and some mention is
made of our current and intended investigations, i.e., automatic con-
tour line generation with conventional stereomodels by means of
laser techniques.
RESUME: Nous passons en revue les travaux que nous avons effectués
depuis 1969 dans le domaine de l'hologrammétrie. Nous dégageons les
orientations que l'hologrammétrie devrait, à notre avis, suivre à
l'heure actuelle et nous disons un mot de nos recherches présentes,
c'est-à-dire de la formation automatique des courbes de niveau dans
des stéréomodéles conventionnels au moyen de techniques laser.
day be utilized by photogrammetrists be-
cause it was a new means of recording three-
dimensional pictures.
In 1968, I became a student in Québec pre-
paring a master’s degree in photogrammetry.
I decided as a thesis topic to investigate di-
rect measurement in holograms, which had
never been done. Mrs. Madeleine Marquet,
from the Optics Institute of Paris, in July 1968
at the XI International Congress of Photo-
grammetry, said concerning the institute’s
PHOTOGRAMMETRIC ENGINEERING AND REMOTE SENSING,
Vol. 42, No. 3, March 1976, pp. 343-344.
me. I shall reply by saying that the whole
problem is a function of the precision that
could be obtained during the reconstruction,
when the hologram is repositioned where it
was during the recording. We are now inves-
tigating this by interposition ofareseau in the
beams to increase the precision; however, as
yet we have not obtained valuable results."
With the financial support ofthe Canadian
Ministry of Energy, Mines and Resources, we
have worked on that problem for two years.
343
