Abstract: A railroad track recognition apparatus has an index calculating unit, an initial searching unit, a secondary searching unit, and a railroad track recognizing unit. The index calculating unit calculates an index value, for each pixel or pixel group of a captured image. The initial searching unit selects a line segment, having a larger evaluation value obtained from the index values, from a plurality of line segments in a first search area, and the secondary searching unit selects a line segment, having a larger evaluation value obtained from the index values, from a second area or a third area. The railroad track recognizing unit recognizes a railroad track based on reference points of the line segments selected by the initial and secondary searching units.

Abstract: An image processing apparatus has a processing circuit. The processing circuit functions as a three-dimensional data generation unit, a two-dimensional data generation unit, and a recognition image generation unit. The three-dimensional data generation unit generates three-dimensional data of an object ton the basis of an image of the object on which object information represented by a character or a symbol is attached, and a distance image indicating a distance between a reference position and the object for each pixel. The two-dimensional data generation unit flattens the three-dimensional data generated by the three-dimensional data generation unit to generate two-dimensional data. The recognition image generation unit generates a recognition image which is used to recognize the object information, on the basis of the two-dimensional data generated by two-dimensional data generation unit.

Abstract: A railroad track recognition apparatus has an index calculating unit, an initial searching unit, a secondary searching unit, and a railroad track recognizing unit. The index calculating unit calculates an index value, for each pixel or pixel group of a captured image. The initial searching unit selects a line segment, having a larger evaluation value obtained from the index values, from a plurality of line segments in a first search area, and the secondary searching unit selects a line segment, having a larger evaluation value obtained from the index values, from a second area or a third area. The railroad track recognizing unit recognizes a railroad track based on reference points of the line segments selected by the initial and secondary searching units.

Abstract: An image processing apparatus has a processing circuit. The processing circuit functions as a three-dimensional data generation unit, a two-dimensional data generation unit, and a recognition image generation unit. The three-dimensional data generation unit generates three-dimensional data of an object ton the basis of an image of the object on which object information represented by a character or a symbol is attached, and a distance image indicating a distance between a reference position and the object for each pixel. The two-dimensional data generation unit flattens the three-dimensional data generated by the three-dimensional data generation unit to generate two-dimensional data. The recognition image generation unit generates a recognition image which is used to recognize the object information, on the basis of the two-dimensional data generated by two-dimensional data generation unit.