DETERMINATION OF A MEASUREMENT ERROR

摘要

For swift and secure determination of a measurement error a first digital image is obtained using an image sensor unit, wherein a line of sight of an optical arrangement is oriented in a first face direction. A characteristic image area in the first digital image and the position thereof on an image sensor unit is determined. A second digital image is then taken with a line of sight of the image sensor unit oriented in a second face and is the characteristic image area are defined in the first image is searched in the second digital image, wherein preceding late be first or the second digital image is rotated in the image plane by 180°. Then in the second digital image the position of the characteristic image area is determined on the image sensor unit. And offset between the characteristic image area in the first digital image and the characteristic image area in the second digital image is a quantity of the measurement error.

主权项

1. A measurement device comprising:
a recording unit for obtaining a first digital image having a plurality of pixels, using an image sensor unit, wherein a line of sight of an optical arrangement of the image sensor unit is oriented in a first face; an image processing unit for determining a characteristic image area in the first digital image and for determining pixel positions of pixels of the characteristic image area on the image sensor unit; an alignment unit for orienting the line of sight of the optical arrangement of the image sensor unit in a second face; wherein the image processing unit is arranged to find the characteristic image area in a second digital image obtained using the recording unit in the second face of the image sensor unit, whereby herein the first or second digital image is rotated by 180° in the image plane, to determine pixel positions of pixels of the characteristic image area in the second digital image on the image sensor unit, and to determine and offset between the pixel positions of the characteristic image area in the first digital image on the image sensor unit and the pixel positions of the characteristic image area in the second digital image on the image sensor unit as a measurement error.