coo_circularity {Momocs}

Calculates the Haralick's circularity of a shape

Description

coo_circularity calculates the 'circularity measure'. Also called 'compactness' and 'shape factor' sometimes. coo_circularityharalick calculates Haralick's circularity which is less sensible to digitalization noise than coo_circularity. coo_circularitynorm calculates 'circularity', also called compactness and shape factor, but normalized to the unit circle.

Usage

coo_circularity(coo)

## Default S3 method:
coo_circularity(coo)

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

coo_circularityharalick(coo)

## Default S3 method:
coo_circularityharalick(coo)

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

coo_circularitynorm(coo)

## Default S3 method:
coo_circularitynorm(coo)

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

Arguments

coo

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

Value

numeric for single shapes, list for Coo of the corresponding circularity measurement.

Source

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

See Also

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

Examples

# coo_circularity
bot[1] %>% coo_circularity()
bot %>%
    slice(1:5) %>% # for speed sake only
    coo_circularity

# coo_circularityharalick
bot[1] %>% coo_circularityharalick()
bot %>%
    slice(1:5) %>% # for speed sake only
    coo_circularityharalick

# coo_circularitynorm
bot[1] %>% coo_circularitynorm()
bot %>%
    slice(1:5) %>% # for speed sake only
    coo_circularitynorm