Metric Potentials Of Simple Cameras In Close Range Photogrammetry

Close-range photogrammetry has experienced considerable growth during the past few years, and have shown potential for even. greater growth in the future. The increased acceptance of properly calibrated non-metric data acquisition systems such as simple (non-metric) cameras, T.V., and X-rays in photogrammetric work is expected to open the door for many engineers and scientists to make full use of the technical and economical advantages of photogrammetry. The author presents a number of examples to illustrate the metric potentials of simple cameras in close-range photogrammetry, and discusses the various approaches used. To ensure reliable and precise results, three basic requirements must be fulfilled: careful calibration of the camera, sufficient control in the object space, and the use of the analytical approach in data reduction.