From: Real time detection system for rail surface defects based on machine vision
Features | Physical meaning | Descriptive meaning |
---|---|---|
Area | The total number of pixels in the boundary and the inner area of the boundary | Express the size of defect |
Rectangularity | The ratio of the area of the defect area to the area of the minimum external moment | Express the degree of fullness of the defect region in the outer rectangle |
Length–width ratio | The ratio of the length and width of the minimum circumscribed rectangle | Reflect the shape of the defect region |
Density | The ratio of the square of the perimeter to the area | Express the size of the perimeter within the unit area of the defect |