An image processing device includes a signal processing device, and the signal processing device is configured to perform distance determination processing of determining, based on a depth map concerning an image displayed on a display, an image portion inside a target distance range which is a predetermined distance range in the image, and an image portion outside the target distance range, and perform image processing of subjecting at least the image portion outside the target distance range to image processing of monotonizing visibility based on a determination result of the distance determination processing and displaying the image on the display.