An in-vehicle device, comprising: an image acquisition unit that obtains a captured image from a camera (2a, 2b) 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 outputs a plurality of sets of detection results pertaining to detection of the plurality of types of the accumulation; an image recognition unit that recognizes an object image, expressing a specific object present in the surrounding environment, in the captured image; a detection results integrating unit that calculates integrated detection results by integrating the plurality of sets of detection results; and an operation control unit that controls operation executed by the image recognition unit based upon the integrated detection results; wherein: the detection results integrating unit individually projects the various sets of detection results provided by the accumulation detection unit onto a single coordinate system; and calculates a set of composite coordinates (P, Q) on the coordinate system by combining a plurality of sets of coordinates (p 1, q 1; p 2, q 2; p 3, q 3; p 4, q 4) obtained through the projection of the various sets of detection results provided by the accumulation detection unit onto the single coordinate system; and the operation control unit controls the operation executed by the image recognition unit based upon the composite coordinates (P, Q); characterized in that the coordinate system assumes a first coordinate axis (p) pertaining to a lens transmission factor affected by the accumulations and a second coordinate axis (q) pertaining to an accumulation area occupied by accumulations settled on the camera lens; and the various sets of detection results provided by the accumulation detection unit are each represented by the lens transmission factor and the accumulation area, and a range to be assumed for coordinates determined based upon the detection results represented by two values is individually set in correspondence to each of the plurality of types of accumulation. an image acquisition unit that obtains a captured image from a camera (2a, 2b) 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 outputs a plurality of sets of detection results pertaining to detection of the plurality of types of the accumulation; an image recognition unit that recognizes an object image, expressing a specific object present in the surrounding environment, in the captured image; a detection results integrating unit that calculates integrated detection results by integrating the plurality of sets of detection results; and an operation control unit that controls operation executed by the image recognition unit based upon the integrated detection results; wherein: the detection results integrating unit individually projects the various sets of detection results provided by the accumulation detection unit onto a single coordinate system; and calculates a set of composite coordinates (P, Q) on the coordinate system by combining a plurality of sets of coordinates (p 1, q 1; p 2, q 2; p 3, q 3; p 4, q 4) obtained through the projection of the various sets of detection results provided by the accumulation detection unit onto the single coordinate system; and the operation control unit controls the operation executed by the image recognition unit based upon the composite coordinates (P, Q); characterized in that the coordinate system assumes a first coordinate axis (p) pertaining to a lens transmission factor affected by the accumulations and a second coordinate axis (q) pertaining to an accumulation area occupied by accumulations settled on the camera lens; and the various sets of detection results provided by the accumulation detection unit are each represented by the lens transmission factor and the accumulation area, and a range to be assumed for coordinates determined based upon the detection results represented by two values is individually set in correspondence to each of the plurality of types of accumulation. the detection results integrating unit individually projects the various sets of detection results provided by the accumulation detection unit onto a single coordinate system; and calculates a set of composite coordinates (P, Q) on the coordinate system by combining a plurality of sets of coordinates (p 1, q 1; p 2, q 2; p 3, q 3; p 4, q 4) obtained through the projection of the various sets of detection results provided by the accumulation detection unit onto the single coordinate system; and the operation control unit controls the operation executed by the image recognition unit based upon the composite coordinates (P, Q); characterized in that the coordinate system assumes a first coordinate axis (p) pertaining to a lens transmission factor affected by the accumulations and a second coordinate axis (q) pertaining to an accumulation area occupied by accumulations settled on the camera lens; and the various sets of detection results provided by the accumulation detection unit are each represented by the lens transmission factor and the accumulation area, and a range to be assumed for coordinates determined based upon the detection results represented by two values is individually set in correspondence to each of the plurality of types of accumulation.