Image processing device and operating method for image processing device

An image processing device provided with: a first input unit (21) for inputting image data including front-field and side-field images; an emphasis processing unit (26) for emphasizing an edge of an image represented by the inputted image data; and a boundary correction unit (27) for performing correction processing which is non-interchangeable with the edge emphasis processing on a boundary region between the front field and the side field in the edge-emphasized image data, the boundary correction unit (27) being provided to a post-stage side of the emphasis processing unit (26).