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Publication Details
| Published Date: | |
|---|---|
| Authors: | Thomas Luhmann |
| Company: | CMSC |
| Print Format: | Technical Paper |
| Citation: | Thomas Luhmann, "High-Precision Photogrammetry Using RGB Color Information," The Journal of the CMSC, Vol. 1, No. 2, Autumn 2006 |
Abstract
This article discusses the possibilities of using all three channels of a true color image for high-precision photogrammetric 3D point measurement. After a survey of common types of digital color sensors, the wavelength-dependent imaging errors of commonly used lenses are discussed, as well as how the different options for correcting these occurring errors are derived. The resulting effect on image and object accuracy is verified by bundle adjustments with self calibration. For standard imaging configurations in close-range photogrammetry, a significantly enhanced precision (a factor of 1.7) can be proved for different camera and lens combinations. It is shown that the mathematical model matches the physical imaging properties of the lens down to a circular aperture (ca) of 1/50th of a pixel. However, a significant improvement of standardized length measuring errors could not yet be achieved.
