A method for determining a zooming value of an image source, the method comprising: receiving, at a computing unit of a first camera of the image source, first image information of a first image of an object of interest, wherein the first image information comprises a first tilt angle of the first camera of the image source; receiving second image information, at the computing unit of the first camera of the image source, of a second image of the object of interest, wherein the second image information is indicative of a second tilt angle of a second camera of the image source, the first camera being separate from the second camera; determining, at the computing unit of the first camera of the image source, a first zooming value corresponding to the first image, wherein determining the first zooming value comprises: determining whether the object of interest is located at a center of a viewing area of the first camera and determining the first zooming value based in part on whether the object of interest is located at the center of the viewing area; and determining the first zooming value comprises determining a smaller of: a ratio of a height of the viewing area of the first camera to a height of the portion of the viewing area of the first camera occupied by the object of interest; and a ratio of a width of the viewing area of the first camera to a width of the portion of the viewing area of the first camera occupied by the object of interest; calculating, at the computing unit of the first camera of the image source, a second zooming value using the first tilt angle, the first zooming value, and the second tilt angle, such that a second size of the object provided by the second camera with the second tilt angle remains constant with respect to a first size of the object in the first image responsive to the second zooming value being applied by the second camera; and sending zooming information, indicative of the second zooming value, from the computing unit of the first camera to the second camera. receiving, at a computing unit of a first camera of the image source, first image information of a first image of an object of interest, wherein the first image information comprises a first tilt angle of the first camera of the image source; receiving second image information, at the computing unit of the first camera of the image source, of a second image of the object of interest, wherein the second image information is indicative of a second tilt angle of a second camera of the image source, the first camera being separate from the second camera; determining, at the computing unit of the first camera of the image source, a first zooming value corresponding to the first image, wherein determining the first zooming value comprises: determining whether the object of interest is located at a center of a viewing area of the first camera and determining the first zooming value based in part on whether the object of interest is located at the center of the viewing area; and determining the first zooming value comprises determining a smaller of: a ratio of a height of the viewing area of the first camera to a height of the portion of the viewing area of the first camera occupied by the object of interest; and a ratio of a width of the viewing area of the first camera to a width of the portion of the viewing area of the first camera occupied by the object of interest; determining whether the object of interest is located at a center of a viewing area of the first camera and determining the first zooming value based in part on whether the object of interest is located at the center of the viewing area; and determining the first zooming value comprises determining a smaller of: a ratio of a height of the viewing area of the first camera to a height of the portion of the viewing area of the first camera occupied by the object of interest; and a ratio of a width of the viewing area of the first camera to a width of the portion of the viewing area of the first camera occupied by a ratio of a height of the viewing area of the first camera to a height of the portion of the viewing area of the first camera occupied by the object of interest; and a ratio of a width of the viewing area of the first camera to a width of the portion of the viewing area of the first camera occupied by the object of interest; calculating, at the computing unit of the first camera of the image source, a second zooming value using the first tilt angle, the first zooming value, and the second tilt angle, such that a second size of the object provided by the second camera with the second tilt angle remains constant with respect to a first size of the object in the first image responsive to the second zooming value being applied by the second camera; and sending zooming information, indicative of the second zooming value, from the computing unit of the first camera to the second camera.