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公开(公告)号:EP4148664A1
公开(公告)日:2023-03-15
申请号:EP21800555.1
申请日:2021-04-28
发明人: LI Shenglan , BANNO Kazumi , NAGASE Masaki , OTA Hideki , TOYOSHIMA Kunimitsu
摘要: A print inspection device includes a camera that captures a character printed on an inspection target, a shape matching processor (33), a deformation pattern generator (34), and an inspection processor (35). The shape matching processor (33) checks a shape of a captured character pattern included in a captured image obtained by the camera against a shape of a preset reference character pattern while changing a deformation degree of the shape of the reference character pattern and searches for a matched character in which a similarity of the shape of the captured character pattern to the shape of the reference character pattern is greater than or equal to a threshold value. The deformation pattern generator (34) generates a deformed character pattern obtained by deforming the reference character pattern at the deformation degree to which the character is matched in the shape matching process. The inspection processor (35) inspects whether a printed state of the character is satisfactory from a result of the comparison between the deformed character pattern and the captured character pattern.
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公开(公告)号:EP4254062A1
公开(公告)日:2023-10-04
申请号:EP21897732.0
申请日:2021-11-11
发明人: WATANABE Tohru , OTA Hideki , TOYOSHIMA Kunimitsu
IPC分类号: G03B11/00 , G03B15/00 , G03B15/02 , G03B15/05 , H04N5/225 , H04N5/232 , G01N21/88 , G01N21/90
摘要: An imaging device (15) includes a camera (30), light sources (21 to 23), an optical bandpass filter (31), and a conversion unit (60). The camera (30) includes an image sensor (33) including a N-band color filter (where N is a natural number greater than or equal to 3). The M types of light sources (21 to 23) (where M is a natural number that satisfies 2 ≤ M ≤ N) have the emission spectral characteristics of having respective peaks in mutually different wavelength ranges within a visible light range and a near-infrared range. The conversion unit (60) generates image signals of M bands each having spectral sensitivity to the corresponding one of the mutually different wavelength ranges by performing a matrix operation on an N-band imaging signal (S1) obtained by the image sensor (33) when an article (12) is photographed with the camera (30). The light application direction and the emission intensity are individually selected for each of the light sources (21 to 23).
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