1. A device for redundant object detection comprising: a stereo camera that comprises first and second image sensors configured and arranged to respectively produce, at outputs of the first and second image sensors, first and second mono image data of a scene including objects viewed by the image sensors, a stereo image processor that is connected to the outputs of the first and second image sensors, and that is configured to detect the objects by a stereo image evaluation of stereo image data represented by a combination of the first and second mono image data from the outputs of the first and second image sensors, and that is configured to provide object data regarding the detected objects at an output of the stereo image processor, and a mono image processor that has an object data input connected to the output of the stereo image processor, and that has at least one of a first image input connected to the output of the first image sensor and/or a second image input connected to the output of the second image sensor, and that is configured to classify the detected objects represented in the object data received at the object data input, by performing a redundant detection and a classification of the objects by a mono image evaluation of at least one of the first mono image data from the output of the first image sensor or the second mono image data from the output of the second image sensor.