5.3.2.15. Struct RoI_basic_t

Defined in File features_struct.h

5.3.2.15.1. Struct Documentation

struct RoI_basic_t

Basic features: bounding box, surface & centroid. A bounding box represents a rectangular box around the RoI. The surface is the number of pixels that are in the connected-component (CC). The centroid is the center of mass of the RoI.

Public Members

uint32_t id: RoI unique identifiers. A RoI identifier should starts from 1 while 0 should be reserved for uninitialized structure.

uint32_t xmin: Minimum \(x\) coordinates of the bounding box.

uint32_t xmax: Maximum \(x\) coordinates of the bounding box.

uint32_t ymin: Minimum \(y\) coordinates of the bounding box.

uint32_t ymax: Maximum \(y\) coordinates of the bounding box.

uint32_t S: Numbers of points/pixels = surfaces of the RoIs.

uint32_t Sx: Sums of \(x\) properties.

uint32_t Sy: Sums of \(y\) properties.

uint64_t Sx2: Sums of squared \(x\) properties.

uint64_t Sy2: Sums of squared \(x\) properties.

uint64_t Sxy: Sums of \(x \times y\) properties.

float x: \(x\) coordinates of the centroid ( \( x = S_x / S \)).

float y: \(y\) coordinates of the centroid ( \( y = S_y / S \)).