IMAGE PROCESSING DEVICE, IMAGE PICKUP DEVICE, COMPUTER, IMAGE PROCESSING METHOD AND NON TRANSITORY COMPUTER READABLE MEDIUM

An image reduction processing section 16 includes a data acquisition section 70 that acquires whether shooting condition data is included in image capture data (including image pickup data) 30 and contents of the shooting condition data, and reduction processing discrimination unit for discriminating at least any of whether reduction association processing (such as low-pass filter processing) associated with reduction processing of generating reduced image data from the image pickup data is executed, a processing parameter (such as a cutoff frequency of low-pass filter processing) of the reduction association processing, and a processing parameter (such as a reduction ratio) of the reduction processing, on the basis of an acquisition result of the shooting condition data. The shooting condition data includes information on the presence or absence of the optical low-pass filter and information on the array of the color filters.