Methods and devices for displaying image with changed field of view

An image-display method comprising:

• a1. positioning a first display screen so that a display surface of said first display screen fills substantially the entire visual field of a first eye of a human and is not visible to a second eye of said human;
• b1. at a first display refresh-rate:
• i. from a first video stream extracting a pixelated still first base image having a first base field of view, said first base image representing a first scene, said first base image being digital image data stored in a digital memory;
• ii. from said first base image, creating a pixelated first display image being digital image data representing said entire first scene, said first display image having a first display field of view different from said first base field of view, so that said first scene as represented by said first display image has a field of view not greater than the visual field of said first eye, said creating said first display image comprising while retaining the position of each pixel relative to neighboring pixels translating pixels, each translated pixel from a base coordinate in said first base image to a display coordinate in said first display image, and
• iii. on said first display screen displaying said first display image to said first eye so that the entire said first field of view of said first display image is perceived by the visual field of said first eye at one time,
• thereby allowing said first eye to perceive an entirety of said first scene at one time.