1. An in-vehicle device, comprising: an image acquisition unit that obtains a captured image from a camera that captures, via a camera lens, an image of a surrounding environment around a vehicle; an accumulation detection unit that individually detects a plurality of types of accumulation settled at the camera lens based upon the captured image and generates a plurality of sets of detection results, each corresponding to one of the plurality of types of accumulation; an image recognition unit that recognizes an object image, expressing a specific object present in the surrounding environment, in the captured image; an integrated unit that receives a plurality of sets of detection results from the accumulation detection unit and forwards the received plurality of detection results to the image recognition unit via an operation control unit, wherein: the image recognition unit under control of the operation control unit processes the plurality of sets of detection results, and the integrating unit individually projects the plurality of sets of detection results provided by the accumulation detection unit onto a single coordinate system and sets composite coordinates on the coordinate system based upon a plurality of sets of coordinates obtained through projection and whether the composite coordinates are closer to a first coordinate axis or to a second coordinate axis.