| 摘要 |
PROBLEM TO BE SOLVED: To provide a technique for reducing the circuit scale related to restored image processing in an image pick-up device, configured to increase the focal depth by modulating an optical image and to remove the modulation by restored image processing, and for making the image pick-up device also applicable to capturing of video.SOLUTION: An image pick-up device includes an image sensor (3), an optical system (2) including a phase plate (21) for modulating the optical transfer function of the optical image of an object, and focusing the optical image modulated through the phase plate (21) on the image capturing surface of the image sensor (3), and a spatial filtering section (6) performing restored image processing for removing the modulation by an optical phase filter, by performing two-dimensional spatial filtering of a focused image on the image capturing surface of the image sensor (3). Modulation characteristics given to the optical image by the phase plate (21) are differentiated in two horizontal and vertical directions orthogonal to each other, on the image capturing plane perpendicular to an optical axis. |
