Patent ID: 8072514

Claim:
An imaging apparatus comprising: a conversion unit comprising a plurality of unit-pixels for converting incident radiation transmitted through a subject or light generated based on the incident radiation into pixel information; a signal processing unit for reading the pixel information for individual unit-pixels in a unit pixel-reading mode, and for reading the pixel information for multi-pixels, where each multi-pixel is based on a plurality of the unit-pixels in a multi-pixel reading mode; a storage unit for storing position information of a defective unit-pixel in the unit-pixel reading mode and position information of a defective multi-pixel in the unit-pixel reading mode, wherein the position information of the defective unit-pixel is extracted by comparing, with a first threshold value, the pixel information for that unit-pixel obtained by irradiation of said conversion unit with the radiation or the light, and the position information of the defective multi-pixel is extracted by comparing, with a second threshold value, the pixel information for unit-pixels of the multi-pixel or the pixel information for the multi-pixel obtained by irradiation of said conversion unit with the radiation or the light; and a correction unit for performing a correction based on the position information of the defective unit-pixel for the pixel information for the unit-pixel in the unit-pixel reading mode, and for performing a correction based on the position information of the defective multi-pixel for the pixel information for multi-pixel in the multi-pixel reading mode.