Abstract: Piston has crown portion 2 having crown surface 2a defining combustion chamber, thrust-side and anti-thrust-side skirt portions 3a, 3b formed integrally with crown portion and sliding on cylinder wall surface, a pair of apron portions 4a, 4a joined to skirt portions in circumferential direction, recessed portion 6 formed on back surface that is opposite side to crown surface and extending between skirt portions along substantially longitudinal direction, and a plurality of protrusions 7 formed integrally with bottom surface of recessed portion and extending along arrangement direction of skirt portions. At least one end edge in longitudinal direction of protrusion is integrally connected to inner side surface, facing one end edge of protrusion, of recessed portion. Adequate transcription performance to molding surface can therefore be ensured while removing remains of air on bottom side of recessed portion of mold for molding protrusions on crown portion back surface during casting.

Abstract: An object recognition apparatus includes image information acquisition means for acquiring image information of an object to be recognized, storage means for storing detection profile information associating an object candidate with a detector capable of detecting the object candidate, and model image information of the object candidate associated with the object candidate and object detection means including detectors defined in the detection profile information, the object detection means detecting the object to be recognized by using the detector from the image information acquired by the image information acquisition means. The detector of the object detection means detects the object candidate by comparing the model image information of the object candidate associated with the detector in the detection profile information with the image information of the object to be recognized acquired by the image information acquisition means, and outputs the detected object candidate as the object to be recognized.

Abstract: An object recognition apparatus includes image information acquisition means for acquiring image information of an object to be recognized, storage means for storing detection profile information associating an object candidate with a detector capable of detecting the object candidate, and model image information of the object candidate associated with the object candidate and object detection means including detectors defined in the detection profile information, the object detection means detecting the object to be recognized by using the detector from the image information acquired by the image information acquisition means. The detector of the object detection means detects the object candidate by comparing the model image information of the object candidate associated with the detector in the detection profile information with the image information of the object to be recognized acquired by the image information acquisition means, and outputs the detected object candidate as the object to be recognized.

Abstract: Piston has crown portion 2 having crown surface 2a defining combustion chamber, thrust-side and anti-thrust-side skirt portions 3a, 3b formed integrally with crown portion and sliding on cylinder wall surface, a pair of apron portions 4a, 4a joined to skirt portions in circumferential direction, recessed portion 6 formed on back surface that is opposite side to crown surface and extending between skirt portions along substantially longitudinal direction, and a plurality of protrusions 7 formed integrally with bottom surface of recessed portion and extending along arrangement direction of skirt portions. At least one end edge in longitudinal direction of protrusion is integrally connected to inner side surface, facing one end edge of protrusion, of recessed portion. Adequate transcription performance to molding surface can therefore be ensured while removing remains of air on bottom side of recessed portion of mold for molding protrusions on crown portion back surface during casting.