coo_eccentricity {Momocs}

Calculates the eccentricity of a shape

Description

coo_eccentricityeigen uses the ratio of the eigen values (inertia axes of coordinates). coo_eccentricityboundingbox uses the width/length ratio (see coo_lw).

Usage

coo_eccentricityeigen(coo)

## Default S3 method:
coo_eccentricityeigen(coo)

## S3 method for class 'Coo'
coo_eccentricityeigen(coo)

coo_eccentricityboundingbox(coo)

## Default S3 method:
coo_eccentricityboundingbox(coo)

## S3 method for class 'Coo'
coo_eccentricityboundingbox(coo)

Arguments

coo

a matrix of (x; y) coordinates or any Coo

Value

numeric for single shapes, list for Coo.

Source

Rosin PL. 2005. Computing global shape measures. Handbook of Pattern Recognition and Computer Vision. 177-196.

See Also

coo_eccentricityboundingbox

Other coo_ descriptors: coo_angle_edges(), coo_angle_tangent(), coo_area(), coo_boundingbox(), coo_chull(), coo_circularity(), coo_convexity(), coo_elongation(), coo_length(), coo_lw(), coo_rectangularity(), coo_rectilinearity(), coo_scalars(), coo_solidity(), coo_tac(), coo_width()

Examples

# coo_eccentricityeigen
bot[1] %>% coo_eccentricityeigen()
bot %>%
    slice(1:3) %>% # for speed sake only
    coo_eccentricityeigen()

# coo_eccentricityboundingbox
bot[1] %>% coo_eccentricityboundingbox()
bot %>%
    slice(1:3) %>% # for speed sake only
    coo_eccentricityboundingbox()