Method and apparatus for operating printing presses

A method for controlling operating processes or measuring processes in connection with a printed image applied to a printing material, includes acquiring image information from the printed image on the printing material with a camera device. The data acquired by the camera is compared in a computer with digital image data of the printed image. Operating processes or measuring processes are triggered by the computer on the basis of the identified printed image on the printing material. The printing material is displayed on a desk, the camera device detects objects or persons covering the printing material and specific operating, processes or measuring processes are triggered on the basis thereof. An apparatus for carrying out the method is also provided.