Patent ID: 9599436
Date: 2017-03-21
CPC Classifications: F41G,G06T

Claim:
1. An external vision and/or weapon aiming and firing system configured to be installed on board a military land vehicle and/or a military aircraft and/or a military naval unit, and comprising: a video capture device configured to capture a video stream of a scene outside the military land vehicle or the military aircraft or the military naval unit, said video stream comprising a sequence of colour images, wherein the images include pixels with respective colours expressed in a predefined RGB colour space in terms of red, green and blue colour components; an electronic control unit connected to the video capture device to acquire the video stream captured by the latter and configured to insert an aiming reticle in the images of said video stream that indicates aiming of the video capture device and/or of a weapon installed on board the military land vehicle or the military aircraft or the military naval unit, thereby generating a corresponding output video stream; and a user interface connected to the electronic control unit to receive the output video stream generated by the latter and which is configured to display the received video stream; wherein the electronic control unit is configured to: automatically change a colour of the aiming reticle by performing the following operations: compute a value indicative of a colour difference between the predefined regions of two or more immediately consecutive images in the video stream acquired from the video capture device on the basis of the average values of the components L*, a* and b* of the pixels in said predefined regions; and change the colour of the aiming reticle only if the value indicative of said colour difference is equal to, or greater than, a predefined threshold.