Dual camera calibration for 3-D machine vision metrology

Three-dimensional measurement of a remote object with a single CCD camera

“…Based on an established relationship between the distance and pixel counts between the projected spots on a CCD image, 3-dimensional measurement of a distant object can be obtained via this proposed method. Note that the method proposed in this paper is quite different from those which use two CCD cameras [10]- [11] during the measuring. By regulating the height of a CCD camera, only one CCD camera is only required to overcome the problem of image loss [12]- [13].…”

“…When the CCD camera moves along the vertical direction, the object in images will according move vertically as shown in Fig. 2, similar to the distance measuring systems [10]- [11] using the two CCD cameras. In this paper, a single CCD camera is only used, which circumvents the problems of measuring inaccuracy due to different camera parameters during the measurement.…”

An on-line stereo-vision system for dimensional measurements of rubber extrusions

“…Several calibration techniques can be found in literature [7,8] that differ from one another in a number of aspects: field of application, position of cameras, computational complexity, accuracy and robustness. A first selection was made excluding those methods requiring the relative 3D position of the two cameras to be known exactly.…”

“…The chosen implicit calibration algorithm [7,9] is based on the direct linear transformation method and results in an over-determined set of linear algebraic equations that can be utilized in determining the 3D coordinate.…”

Camera Calibration for Road Applications

“…Some authors [8,9,13,14] do not consider lens distortion at all, while others [5,15] compute a global model and others [16][17][18][19] use a local correction.…”