Photogrammetry I (Introduction To Photogrammetry)

LEARNING OUTCOMES

The course has a double purpose. First, the students should learn the basic task of a photogrammetric process and to become familiar with the whole range of current applications of Photogrammetry, its importance for engineering projects and its synergy with other methods for collection and processing of 3D information. Second, they should comprehend the basic concepts and the fundamental problems of photogrammetry, fully grasp the geometry of the image and its distortions, understand the geometry of the stereopair, learn to assess the expected accuracy of the outcome of a photogrammetric procedure and, finally, be able to apply this knowledge in practical exercises implementing and evaluating certain metric image-based applications. Thus, this course is at the same time then necessary background for the next two compulsory photogrammetric courses.

After completing the course, the students:

• Have fully understood the specific character of the scientific-technological field of photogrammetry and its connection to other data collection techniques used by the surveying and geomatics engineer (remote sensing, geodesy);
• Can adequately handle the basic concepts involved in image geometry (perspective projection), having at the same time understood the basic sources of error and the revalnt correcting techniques;
• Have well comprehended the basic photogrammetric methodology (single- image/stereoscopic) for reconstructing 3D space, thus being able to adapt it for particular cases;
• Are trained in the practical application of the concepts taught so that may combine the theoretical background with the production and evaluation of concrete results;
• Hence are in position to address in practice the fundamental photogrammetric tasks (camera calibration, space resection and intersection, relative and absolute orientation) and perform relatively simple single or double image metric tasks;
• Are capable, using the knowledge from previous courses on programming and least squares adjustments, to implement program code for solving fundamental problems;
• Have all background knowledge to comfortably follow the next compulsory courses Photogrammetry ΙΙ and Photogrammetry ΙΙΙ.

 

General Competences

• Working independently
• Production of free, creative and inductive thinking
• Able for criticism and self-criticism

 

SYLLABUS

Introduction to photogrammetry and its importance for surveying and geoinformatics. Historic development, categorization, application fields, photogrammetric products. Analogue and digital images. Central projection and its properties. Scale of nadir images, displacement due to relief, image vanishing points. Cameras and platforms for photogrammetric recording. Image and space reference systems. 2D and 3D linear coordinate transformations. Rotation matrices. Image coordinate measurements. Ground control. Interior image orientation. Correction of image coordinates, lens distortions. Exterior image orientation. The collinearity condition as mathematical model of central projection. Scale of oblique images. Fundamental photogrammetric problems. Photogrammetric space resection – photogrammetric space intersection – camera calibration. Geometry of the stereopair – normal case of the pair. Longitudinal and lateral overlap. Stereoscopic parallax and stereoscopic viewing. Analytic orientations of the stereopair. Coplanarity condition. Relative and absolute orientation of the stereopair. Basic earlier principles of photogrammetric instruments. Single-image photogrammetry. Rectification of planar objects.

 

STUDENT PERFORMANCE EVALUATION

Language of evaluation: Greek
Methods of Evaluation:
• Written examination in the end of the semester (70%), which combines open-ended questions and numeric calculations.
• Evaluation of performance in the Lab exercises (30%)

 

SUGGESTED BIBLIOGRAPHY

1. Mikhail E.M., Bethel J.S., McGlone J.C., 2001. Introduction to Modern Photogrammetry. John Wiley & Sons, Inc., New York
2. Wolf P.R., DeWitt B.A., 2000. Elements of Photogrammetry with Applications in GIS. McGrawHill, New York.

In Greek:
1. Dermanis A., 1991. Analytic Photogrammetry. Ziti Editions, Thessaloniki.
2. Kraus K., 2003. Photogrammetry. Vol 1. TEE Editions, Athens.
3. Patias P., 1991. Introduction to Photogrammetry. Ziti Editions, Thessaloniki. Petsa Ε., 2000. Fundamental Concepts and Fundamental Problems of Photogrammetry. Course Notes, UniWA, Athens.