@techreport{oai:ipsj.ixsq.nii.ac.jp:00094411,
 author = {服部, 進 and 井本, 治孝 and 片桐, 重和 and Susumu, Hattori and Harutaka, Imoto and Shigekazu, Katagiri},
 issue = {3},
 month = {Jul},
 note = {レセントリックレンズカメラの安価な 2 つの校正について報告する．テレセントリックレンズは正射投影が成り立つレンズである．まず 2mm の格子を CAD で描いた用紙を使って単写真標定を行ったところ，0.7 画素の像座標の計測精度が得られた．プリンタの位置制御の誤差と思われる 5～10μm 程度の波形の残差と画面周辺部に 20μm 程度の歪曲収差が見られた．つぎにターゲットの絶対座標を使わないように 3 次元のターゲット場を収束撮影し，付加パラメータ付バンドル調整で自己校正を行ったところ，内部標定要素なしで0.44画素 （3.3μｍ） の像座標の計測精度を得た．内部標定要素として Brown パラメータの Ｋ1 項のみを付加パラメータにつけると，0.40 画素の精度が得られた．, This paper reports on two cases of calibration of a telecentric lens (TL) camera images; One is a single photo orientation using a printing lattice and the other is self-calibrating bundle adjustment using a 3D target field. A TL camera is characterized by orthonormal projection rather than conventional central projection. In the first case, a lattice with a 2mm
width drawn with CAD software is used. The estimated measurement precision of image coordinates is 0.7 pixels (5μm) and the residuals with 5 to 10 μm amplitude appeared periodic, which may be attributable to printer's positioning precision. And lens distortions of 10-15μm in magnitude are found in the fringe of the image plane. In the second case, to evade absolute object point coordinates of targets, a 3D field of circles of 2mm in diameter is exposed in a convergent way and their image coordinates are bundle adjusted. When no interior orientation parameters are added, obtained precision of image coordinates is 0.44 pixels. And when a K1 term from Brown's model is added as an additional parameter, the precision is improved to 0.40 pixels.},
 title = {テレセントリックレンズカメラ写真の校正―簡易な格子を使った単写真標定と自己校正付バンドル調整―},
 year = {2013}
}