mpix/stats.h

Compute statistics on images. More...

Functions
void	mpix_stats_from_buf (struct mpix_stats *stats, const uint8_t *buf, struct mpix_format *fmt)
	Collect red, green, blue channel averages of all pixels in an RGB24 frame.
uint8_t	mpix_stats_get_y_mean (struct mpix_stats *stats)
	Get the mean value from a histogram.

Detailed Description

Compute statistics on images.

SPDX-License-Identifier: Apache-2.0

Function Documentation

mpix_stats_from_buf()

void mpix_stats_from_buf	(	struct mpix_stats *	stats,
		const uint8_t *	buf,
		struct mpix_format *	fmt
	)

Collect red, green, blue channel averages of all pixels in an RGB24 frame.

If the nvals field of stats is non-zero, then this value will be used to select the number of pixels sampled from the image. Otherwise a default will be provided.

Parameters

stats	Struct collecting the image statistics.
buf	Buffer of pixels in RGB24 format (3 bytes per pixel) to collect the statistics from.
width	Width of the buffer in pixels.
height	Height of the buffer in pixels.
fourcc	Pixel format of the buffer.

mpix_stats_get_y_mean()

uint8_t mpix_stats_get_y_mean

(

struct mpix_stats *

stats

)

Get the mean value from a histogram.

The result is the mean expressed as grayscale pixel value: range 0 to 255.

Parameters

stats

Statistics collected from the image

Returns

The mean pixel value.