2008 年 47 巻 1 号 p. 44-51
Recently, the number of pixel of amateur digital cameras is amazingly increasing by modern semiconductor and digital technology. Nevertheless the highest pixel of amateur digital camera is achieved 10 mega pixels, and such high resolution amateur digital cameras became the most popular camera on the market in Japan. In these circumstances, the high resolution amateur digital cameras became useful tool in various photogrammetric fields, and some software of digital photogrammetry by using amateur digital still camera has been developed.
Generally, camera calibration by digital photogrammetric software is performed by using test target. The test target should be taken by the digital still camera from several positions and angles, and some images of the test target which were taken by own situation can be obtained. However, it is expected that the calibration results are influenced by the situation which are position, angle, and number of images and so on. In addition, image coordinate of some points on the test target should be obtained for the camera calibration, and the method for acquisition of the image coordinates also influence calibration results.
In these circumstances, the camera calibration was performed on several situations by using “iWitness”, and the calibration results for each situation were evaluated in this paper.