Measurement of image sensor tilt based on amplitude and phase of image
Measurement of image sensor tilt based on amplitude and phase of image
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DOI：
10.1007/s10043-023-00802-2
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发表时间：
2023-04
期刊：
影响因子：
1.2
通讯作者：
K. Kobayashi;Takumi Kawamata;Kazuki Nishi
中科院分区：
文献类型：
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作者：
K. Kobayashi;Takumi Kawamata;Kazuki Nishi
在这项研究中，我们提出了一种测量图像传感器相对于镜头的倾斜度的新方法。镜头和图像传感器单元的装配精度对用户的图像质量有重大影响。任何未对准都会导致相机图像不均匀散焦和失真。我们的方法根据相机图像中包含的幅度（即对比度或散焦）和相位（即失真）来测量图像传感器的倾斜，无需特殊设备和精确校准的参考。幅度和相位在频域中分离。通过光学设计软件的数值模拟证实了该方法的有效性。传感器倾斜可以从图表倾斜来测量，这不会导致任何不均匀的散焦或失真。这项研究实现了两个参数的同时测量和分析，有助于提高制造商的生产力并改善用户的图像质量。
In this study, we present a new method for measuring the tilt of an image sensor to the lens. The assembly accuracy of the lens and image sensor units has a significant influence on the image quality for users. Any misalignment causes non-uniform defocus and distortion in the camera image. Our approach measures the tilt of the image sensor based on the amplitude (i.e., contrast or defocus) and phase (i.e., distortion) included in the camera image without special devices and precisely calibrated references. The amplitude and phase were separated in the frequency domain. The validity of the proposed method was confirmed through a numerical simulation using optical design software. The sensor tilt can be measured from the chart tilt, which does not cause any non-uniform defocus or distortion. This study achieved the simultaneous measurement and analysis of two parameters and can contribute to increase the productivity of manufacturers and improve the image quality for users.