Image processing method and image processing apparatus

An image processing apparatus comprising:

• a memory;
• and
• a processor coupled to the memory and the processor configured to:
• detect a plurality of line segments that indicate edges of an object, based on changes of pixel values of a plurality of pixels included in an input image, wherein each of the plurality of line segments is included in an input image;
• calculate a first feature quantity that includes a plurality of feature quantities for indicating features of individual pixel values of a plurality of pixels located in a first direction perpendicular to a first line segment out of the plurality of line segments and a plurality of feature quantities for indicating features of individual pixel values of a plurality of pixels located in a second direction opposite to the first direction with respect to the first line segment;
• calculate, based on pixel values of pixels located for each predetermined distance in a third direction perpendicular to a second line segment out of the plurality of line segments and pixel values of pixels located for each of the predetermined distance in a fourth direction opposite to the third direction with respect to the second line segment, a second feature quantity that includes a plurality of feature quantities for indicating individual features of the pixels located for each of the predetermined distance from the second line segment;
• and
• determine to integrate the first line segment and the second line segment, based on the first feature quantity and the second feature quantity.

A computer-readable non-transitory recording medium storing a program that causes a computer to execute a procedure, the procedure comprising:

• detecting a plurality of line segments that indicate edges of an object, based on changes of pixel values of a plurality of pixels included in an input image, wherein each of the plurality of line segments is included in an input image;
• calculating a first feature quantity that includes a plurality of feature quantities for indicating features of individual pixel values of a plurality of pixels located in a first direction perpendicular to a first line segment out of the plurality of line segments and a plurality of feature quantities for indicating features of individual pixel values of a plurality of pixels located in a second direction opposite to the first direction with respect to the first line segment;
• calculating, based on pixel values of pixels located for each predetermined distance in a third direction perpendicular to a second line segment out of the plurality of line segments and pixel values of pixels located for each of the predetermined distance in a fourth direction opposite to the third direction with respect to the second line segment, a second feature quantity that includes a plurality of feature quantities for indicating individual features of the pixels located for each of the predetermined distance from the second line segment;
• and
• determining to integrate the first line segment and the second line segment, based on the first feature quantity and the second feature quantity, by a processor.