Deterioration estimation system, deterioration estimation method, and recording medium

A deterioration estimation method comprising:

• detecting road surface deterioration from a first road surface image obtained by imaging a road surface;
• determining, in the first road surface image, a first region in which road surface deterioration is detectable and a second region in which road surface deterioration is difficult to detect;
• calculating a degree of deterioration of the first region based on a detection result from the first road surface image;
• estimating a degree of deterioration of the second region based on a degree of deterioration in road surface deterioration detected from a second road surface image obtained by imaging the road surface before the first road surface image, wherein the second road surface image was captured at the same location as the first road surface image under conditions where road surface deterioration was detectable;
• and
• calculating a degree of deterioration of the road surface by integrating the degree of deterioration of the first region derived from the first road surface image with the degree of deterioration of the second region derived from the second road surface image, wherein the integrated degree of deterioration represents deterioration of an entire road surface at a time when the first road surface image was captured.

A recording medium that non-transiently records a program for causing a computer to execute the steps of:

• detecting road surface deterioration from a first road surface image obtained by imaging a road surface;
• determining, in the first road surface image, a first region in which road surface deterioration is detectable and a second region in which road surface deterioration is difficult to detect;
• calculating a degree of deterioration of the first region based on a detection result from the first road surface image;
• estimating a degree of deterioration of the second region based on a degree of deterioration in road surface deterioration detected from a second road surface image obtained by imaging the road surface before the first road surface image, wherein the second road surface image was captured at the same location as the first road surface image under conditions where road surface deterioration was detectable;
• and
• calculating a degree of deterioration of the road surface by integrating the degree of deterioration of the first region derived from the first road surface image with the degree of deterioration of the second region derived from the second road surface image, wherein the integrated degree of deterioration represents deterioration of an entire road surface at a time when the first road surface image was captured.