A cylinder recognition system, comprising - at least one illuminator providing the illumination of cylinders conveyed on a conveyor line to a filling unit in a storage cabin, - at least one camera generating an image providing the classification of cylinders conveyed to a filling unit, - at least one primary photocell detecting a cylinder conveyed to a filling unit and enabling it to enter into the storage cabin, - at least one primary stopper, which, when there is a cylinder present in the storage cabin, keeps the next cylinder on the line until the cabin is emptied, - at least one secondary photocell detecting the entrance of a cylinder conveyed to a filling unit into the cabin, - at least one operator display by which the number of cylinders conveyed to a filling unit and the number of cylinders deflected are monitored and the type of cylinder is selected, - at least one cylinder centering stopper which stops a cylinder entered into the storage cabin when it just comes to the center of the cabin, - at least one cylinder deflecting piston differentiating the type of cylinders which are to be conveyed for filling from those which are not, - at least one secondary stopper stopping those cylinders which are to be guided by the cylinder deflecting piston for some time, - at least one third photocell detecting the cylinders leaving the storage cabin and activating the cylinder deflecting piston to guide a cylinder leaving the cabin, - at least one filling line by which the type of cylinders classified by the control unit so as to be filled are conveyed for filling, - at least one deflected cylinder line by which the type of cylinders classified by the control unit and not to be filled are deflected from the filling line and proceeded thereon, characterized by - at least one storage cabin in which cylinders conveyed to a filling unit are stopped, their images are taken by a camera and the type of cylinder is determined accordingly, - at least one control unit making use of the color and contrast differences within the image captured by the camera and calculating the cylinder diameter, the collar size, and the pixel area occupied by the upper ring (grip). - at least one illuminator providing the illumination of cylinders conveyed on a conveyor line to a filling unit in a storage cabin, - at least one camera generating an image providing the classification of cylinders conveyed to a filling unit, - at least one primary photocell detecting a cylinder conveyed to a filling unit and enabling it to enter into the storage cabin, - at least one primary stopper, which, when there is a cylinder present in the storage cabin, keeps the next cylinder on the line until the cabin is emptied, - at least one secondary photocell detecting the entrance of a cylinder conveyed to a filling unit into the cabin, - at least one operator display by which the number of cylinders conveyed to a filling unit and the number of cylinders deflected are monitored and the type of cylinder is selected, - at least one cylinder centering stopper which stops a cylinder entered into the storage cabin when it just comes to the center of the cabin, - at least one cylinder deflecting piston differentiating the type of cylinders which are to be conveyed for filling from those which are not, - at least one secondary stopper stopping those cylinders which are to be guided by the cylinder deflecting piston for some time, - at least one third photocell detecting the cylinders leaving the storage cabin and activating the cylinder deflecting piston to guide a cylinder leaving the cabin, - at least one filling line by which the type of cylinders classified by the control unit so as to be filled are conveyed for filling, - at least one deflected cylinder line by which the type of cylinders classified by the control unit and not to be filled are deflected from the filling line and proceeded thereon, characterized by - at least one storage cabin in which cylinders conveyed to a filling unit are stopped, their images are taken by a camera and the type of cylinder is determined accordingly, - at least one control unit making use of the color and contrast differences within the image captured by the camera and calculating the cylinder diameter, the collar size, and the pixel area occupied by the upper ring (grip).