Method, device and installation for composing a video signal

A method comprising:

• composing an output video signal, which comprises an output frame sequence with a pre-established number of pixels for each output frame associated with an output resolution from a plurality of input video signals comprising respective input frame sequences with a number of pixels for each input frame associated with an input resolution, the composing of the output video signal comprising:
• determining, by a computer, a spatial surface on a three-dimensional virtual space, formed by a set of points with three-dimensional coordinates associated with each pixel (p) of each frame of each input frame sequence;
• establishing, by the computer, in the three-dimensional virtual space a visualization point and a visualization window,
• determining, by the computer, a visualization cone in the three-dimensional virtual space based on the visualization point and the visualization window,
• forming, by the computer, output frames from projections of the input frames of the input sequences projected in the visualization window;
• calculating, by the computer, an associated threshold pixel density for the pixels in the visualization window from the output resolution and the associated spatial dimensions of the visualization window;
• determining, by the computer, combinations of overlapping input frames, the projections of which are at least partially overlapping in the visualization window;
• and
• for each combination of overlapping input frames:
• determining, by the computer, whether any of the overlapping input frames has a pixel density in the entire overlapping part greater than or equal to a threshold pixel density;
• based on determining that a frame of the overlapping input frames has the pixel density in the entire overlapping part that is greater than or equal to the threshold pixel density, selecting, by the computer, the frame of the overlapping input frames that has the pixel density in the entire overlapping part that is greater than or equal to the threshold pixel density in order to form the output frame part which is overlapping;
• and
• based on determining that no frame of the overlapping input frames has a pixel density in the entire overlapping part that is greater than or equal to the threshold pixel density, selecting the frame of the overlapping input frames which projected on the visualization window has the pixel density closest to the threshold pixel density in order to form the output frame part which is overlapping.