JP2008035274A5 - - Google Patents

Claims (7)

An image sensor that converts incident light into an electrical image signal and outputs it;
Aperture,
Photometric means;
Shutter speed calculation means for calculating a shutter speed based on a predetermined aperture value , sensitivity of the image sensor, and photometric value obtained by the photometry means;
An instruction means for instructing foreign object detection to detect an image of the foreign object by photographing the foreign object attached to the surface of the optical member disposed in front of the image sensor;
Determining means for determining whether the shutter speed calculated by the shutter speed calculating means is slower than a predetermined shutter speed in response to an instruction for foreign object detection by the instruction means ;
When the determination means determines that the calculated shutter speed is not slower than the predetermined shutter speed, the aperture value and the sensitivity are not changed and the predetermined shutter speed is used. If it is determined that the calculated shutter speed is slow, setting means for changing at least one of the aperture value and the sensitivity so that the shutter speed is not slower than the predetermined shutter speed. When,
The was determined by the setting means aperture value, the sensitivity, and by using the shutter speed, imaging apparatus characterized by a control means for controlling to take an image of foreign object detected by the image sensor. Said predetermined aperture value, the imaging device may be set, the imaging apparatus according to claim 1, characterized in that said aperture is a value which most aperture Ri written. By defining the amplification factor of the output of the image sensor, further comprising a sensitivity setting means for setting the sensitivity,
The shutter speed calculating unit, when the foreign object detection is instructed from the instruction means, according to claim 1, with a predetermined sensitivity set by the sensitivity setting means and calculates the shutter speed Or the imaging device of 2. A foreign substance information detection means for detecting the foreign substance information on the basis of the image of the foreign object detection acquired by the control of said control means,
4. The apparatus according to claim 1, further comprising an adding unit that adds the foreign substance information or link information to the foreign substance information to an image file obtained by processing an image signal output from the image sensor. The imaging apparatus of Claim 1 . A foreign substance information detection means for detecting the foreign substance information on the basis of the image of the foreign object detection acquired by the control of said control means,
The imaging apparatus according to any one of claims 1 to 3, further comprising a correction means for correcting, based an image signal output from the imaging element to the foreign substance information. It further has a display means,
When taking an image for the foreign object detection, different from the case of photographing an image other than the image for the foreign object detection, claims 1 to 5, characterized in that the display includes at least shutter speed on the display means The imaging device according to any one of the above. When it is determined that the shutter speed calculated by the shutter speed calculation unit is slower than the preset shutter speed, the setting unit can detect the foreign matter information within a predetermined accuracy with respect to the aperture value. 6. The imaging apparatus according to claim 4, wherein the imaging device is changed within a range in which a satisfactory imaging state can be secured .