Abstract—In many researches for image processing technology, 3D coordinates measurement can be done by using laser range finders or stereo vision sensors. However, it has a disadvantage of high cost and large and heavy sensors. This study proposes an algorithm of transformation of 2D positions in a camera image to 3D spatial coordinate values. The coordinates of 3 points have to be measured in advance, in order to obtain the coordinate values of unknown points. The proposed algorithm was verified through experiment. This algorithm can be used in modern industry measurement systems and development of weapon systems.

Index Terms—3D measurement, coordinate, monocular camera

Cite: Hyeon Min Lee and Woo Chun Choi, "Algorithm of 3D Spatial Coordinates Measurement Using a Camera Image," Journal of Image and Graphics, Vol. 3, No. 1, pp. 30-33, June 2015. doi: 10.18178/joig.3.1.30-33