Image capturing device, color measuring device, color measuring system, and image forming apparatus

摘要

An image capturing device includes an image capturing unit, a moving unit, a detector, and a determiner. The image capturing unit includes an optical transmission member; and a sensor capturing an image of the subject via the optical transmission member. The moving unit moves the image capturing unit in an optical axis direction of the sensor. The detector detects a contamination from first and second images. The first and second images are captured by the sensor when the image capturing unit is located at first and second positions in the optical axis direction, respectively. The second position is spaced away from the subject than the first position in the optical axis direction. The determiner determines that a contamination is deposited on the optical transmission member when a difference in the number of pixels in which a contamination is detected between the first and second images is less than a threshold.

主权项

1. An image capturing device comprising:
an image capturing unit that includes:
an optical transmission member disposed on a surface facing a subject; anda sensor unit that captures an image of the subject via the optical transmission member; a moving unit that moves the image capturing unit in an optical axis direction of the sensor unit; a detector that detects a contamination from each of a first image and a second image, the first image being captured by the sensor unit when the image capturing unit is located at a first position in the optical axis direction, and the second image being captured by the sensor unit when the image capturing unit is located at a second position spaced farther away from the subject than the first position in the optical axis direction; and a determining unit that determines that a contamination is deposited on the optical transmission member when a difference in the number of pixels in which a contamination is detected between the first image and the second image is less than a first threshold.