OBJECT-DETECTING DEVICE AND METHOD OF EXTRACTING OPERATION OBJECT

An object-detecting device detects an operation object for operating an operating apparatus. The object-detecting device includes an imaging portion for imaging the operation object and an image processor for extracting the operation object. The operation object has a first face, on which outside light falls from outside into the operating apparatus, and a second face opposite to the first face. The imaging portion images the second face of the operation object. The object-detecting device can stably detect the operation object, even when an illuminance variation of outside light is large.