A camera outputs to a host terminal a moving image for display on a display. An image acquisition unit acquires an unprocessed image captured using an imaging element. A simple demosaic processing unit performs a demosaic process on the unprocessed image. A pyramid filter unit converts the unprocessed image into a plurality of reduced images whose resolutions vary in stages. An image transmission unit is provided with a selection unit for selecting a part of the unprocessed image as a specific part and also selecting any one of the plurality of reduced images as a specified reduced image. The specific part of the unprocessed image and the specified reduced image that have been selected are transmitted to a host terminal by a communication unit for a further image process.