1. A method for detecting an object ( 12 ) inside a monitored zone ( 21 ), in which at least two sensors ( 2 , 3 ) respectively monitor at least a part of the monitored zone ( 21 ), comprising: generating respective single digital images ( 24 , 25 ) of the total monitored zone ( 21 ) using each sensor ( 2 , 3 ) with the single images ( 24 , 25 ) of all sensors ( 2 , 3 ) being generated in a uniform coordinate system; flagging as “safe” coordinate points ( 28 , 36 ) of the single images ( 24 , 25 ) generated by each sensor ( 2 , 3 ), which the sensor recognizes as free of the object ( 12 ); flagging as “unsafe” all other coordinate points ( 32 , 33 , 34 , 40 , 41 , 42 ) of the single images ( 24 , 25 ); transmitting the single images ( 24 , 25 ) generated in this manner to an evaluation unit ( 6 ); superimposing the transmitted single images ( 24 , 25 ) using the evaluation unit ( 6 ) to form a resulting total image ( 43 ) in accordance with their common coordinate system, wherein coordinate points ( 28 , 36 ) of the total image ( 43 ) are flagged as “safe”, which correspond to coordinate points flagged as “safe” in at least one of the single images ( 24 , 25 ), and wherein any remaining coordinate points of the total image ( 43 ) are flagged as “unsafe”; and determining coordinates of the object ( 12 ) using the coordinate points flagged as “unsafe” in the total image ( 43 ).