Imaging apparatus, signal processing method for imaging apparatus, and signal processing program for imaging apparatus

A signal processing method for an imaging apparatus,

• wherein the imaging apparatus comprises a zoom lens comprising, in order from an object side, a first lens group that is fixed during variable magnification, a plurality of movable lens groups that move during variable magnification, and a final lens group that is fixed during variable magnification, the first lens group comprising, in order from the object side, a first-a lens group that is fixed during focusing and a first-b lens group that moves during focusing, and an image sensor that captures an image formed by the zoom lens,
• the signal processing method comprises:
• a step of processing a signal output from the image sensor to generate source image data, the signal being output from an effective area set as an area where a normal image is to be captured;
• a step of extracting and outputting image data of an output area set within the effective area from the source image data;
• a step of subjecting the source image data to magnification and reduction processing to correct an angle of view of the image data of the output area, and in a case where the angle of view of the image data of the output area fluctuates with focusing, subjecting the source image data to the magnification and reduction processing in conjunction with focusing and correcting the angle of view of the image data of the output area to a reference angle of view determined for each focal length;
• a step of acquiring information regarding a size of the image sensor from an imaging apparatus body in which the zoom lens is mounted;
• and
• a step of setting the effective area and the output area based on information regarding a size of an image circle of the zoom lens and information regarding the size of the image sensor.

A non-transitory computer readable recording medium storing a signal processing program for an imaging apparatus,

• wherein the imaging apparatus comprises a zoom lens comprising, in order from an object side, a first lens group that is fixed during variable magnification, a plurality of movable lens groups that move during variable magnification, and a final lens group that is fixed during variable magnification, the first lens group comprising, in order from the object side, a first-a lens group that is fixed during focusing and a first-b lens group that moves during focusing, and an image sensor that captures an image formed by the zoom lens,
• the signal processing program causes a computer to implement
• a function of processing a signal output from the image sensor to generate source image data, the signal being output from an effective area set as an area where a normal image is to be captured;
• a function of extracting and outputting image data of an output area set within the effective area from the source image data;
• a function of subjecting the source image data to magnification and reduction processing to correct an angle of view of the image data of the output area, and in a case where the angle of view of the image data of the output area fluctuates with focusing, subjecting the source image data to the magnification and reduction processing in conjunction with focusing and correcting the angle of view of the image data of the output area to a reference angle of view determined for each focal length;
• a function of acquiring information regarding a size of the image sensor from an imaging apparatus body in which the zoom lens is mounted;
• and
• a function of setting the effective area and the output area based on information regarding a size of an image circle of the zoom lens and information regarding the size of the image sensor.