Apparatus and Methods to Display a Modified Image

[0050]Aspects of the present invention relate to a digital media stream wherein some elements are of the digital media stream, but not all, are modified in a reversible way by a machine, which is a switching machine. A computer is a switching machine which is built from, usually binary, switching elements. A digital medium stream, in accordance with an aspect of the present invention, contains at least one digital image, or a plurality of digital images in the case of digital video images. The image content of a digital image or a digital image frame is image data. For display on a screen, digital data is arranged in individual data elements or picture elements, usually called pixels, in a shape of a 2D matrix. The pixels can be written as consecutive horizontal pixel lines on a screen. Each pixel may have an intensity and a color representation. A pixel may represent a black / white value; a grey value; an RGB (red / green / blue) value; a transparency value or any other value that is