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

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.…”

Standard uncertainty evaluation in image-based measurements

“…In the first example, a type A uncertainty evaluation is applied following a black box approach in order to characterize a system for the measurement of the transversal section of samples of gaskets produced for the automotive industry [22,23]. In this case, the measurands are represented by characteristic lengths (height H and width W of the section, using a known coordinate reference system) and by the area A of the transversal section of the bulb, i.e.…”

Determining object boundaries from MR images with sub-pixel resolution: Towards in-line inspection with a mobile tomograph

“…We demonstrate that for this type of industrial process, edge-detection algorithms can be applied to obtain the inner and outer contours of such profiles with the required spatial accuracy from images measured with a mobile MRI system. It is important to notice that even though optical methods have become commercially available for in-line quality control, they are limited to monitor only the external dimensions of the profile (optical methods are used to inspect the inner shape off-line after profiles are cut [15]). Fig.…”