camera_region

This structure is used to identify a subset of pixels in an image

Synopsis:

#include <camera/camera_api.h>

typedef struct {
    uint32_t left;
    uint32_t top;
    uint32_t width;
    uint32_t height;
    uint32_t extra;
} camera_region_t;

uint32_t left: The left coordinate of the region.
A value of 0 refers to the left-most column of the image.
uint32_t top: The top coordinate of the region.
A value of 0 refers to the top-most column of the image.
uint32_t width: The width of the region in pixels.
uint32_t height: The height of the region in pixels.
uint32_t extra: An additional application-dependent value that can be used to convey extra information about a region.
Typically, this extra information may be a weighting, ranking, or other application-specific value to apply when defining a set of regions.

libcamapi

Regions are used to report focus lock positions and to configure region-dependent focus, exposure, and white balance operations.