In the case where a parallax of left and right images is not appropriate, an influence on the health caused by stereoscopic viewing is preliminarily prevented. A camera and a television are connected (step S1) and a television size is input from the camera (step S2). A parallax adjustment amount v is created based on the input television size (step S3) and the left and right image data and the parallax adjustment amount v are transmitted to the television (step S4). When the television receives those (step S101), the parallax of the left and right images is adjusted by the parallax adjustment amount v (step S102). A region including the subject having the largest parallax among subjects in the left and right images is clipped and displayed in a small screen with the size of the display unit of the camera (step S103). The user checks the image displayed in the small screen (step S5) and when there is no problem, the left and right images are displayed on all over the television size in a 3D mode (step S104).
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