CALIBRATION METHOD FOR LINE SCAN CAMERA

• Main Authors: TAMAI RYOJI, SAKAMOTO KAZUYUKI, HIGASHIMOTO TAKATAKE, SUNA HIRONOBU
• Format: Patent
• Language: English; Japanese
• Published: 17.09.2020
• Subjects: MEASURING; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS; MEASURING LENGTH, THICKNESS OR SIMILAR LINEARDIMENSIONS; MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVINGMATERIAL; PERFORMING OPERATIONS; PHYSICS; PUNCHING METAL; TESTING; TRANSPORTING; WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS ORPROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL

To provide a calibration method for a line scan camera that improves accuracy of an image.SOLUTION: A calibration method for a line scan camera includes main scanning direction calibration steps S11 to S13 and sub-scanning direction calibration steps S14 and S15. The main scan direction calibration steps S11 to S13 correct a lens aberration and a distortion of an image which is generated by a yaw in an attitude at installation of the line scan camera. The sub-scan direction calibration steps S14 and S15 correct a discrepancy between main and sub- scan resolutions and a distortion of an image which is generated by a roll in an attitude at installation of the line scan camera.SELECTED DRAWING: Figure 4 【課題】画像の精度が向上するラインスキャンカメラのキャリブレーション方法を提供すること。【解決手段】ラインスキャンカメラのキャリブレーション方法は、主走査方向キャリブレーション工程Ｓ１１〜Ｓ１３と、副走査方向キャリブレーション工程Ｓ１４及びＳ１５とを有する。主走査方向キャリブレーション工程Ｓ１１〜Ｓ１３ではレンズ収差及びラインスキャンカメラ取付時の姿勢でのヨーによって発生する画像の歪みを補正する。副走査方向キャリブレーション工程Ｓ１４及びＳ１５は、主・副走査分解能の不一致及びラインスキャンカメラ取付時の姿勢でのロールによって発生する画像の歪みを補正する。【選択図】 図４