pulp::view::ScreenshotContentStats Struct Reference

Basic content statistics for a decoded PNG. More...

#include <screenshot_compare.hpp>

Public Member Functions
bool	passes_content_floor (uint32_t min_unique_colors=16, double min_luminance_stddev=1.0, double min_non_background_coverage=0.05, double min_opaque_coverage=0.95) const

Public Attributes
bool	valid = false
uint32_t	width = 0
uint32_t	height = 0
uint32_t	total_pixels = 0
uint32_t	unique_colors = 0
	Exact count unless unique_colors_capped is true.
bool	unique_colors_capped = false
double	luminance_mean = 0.0
double	luminance_stddev = 0.0
double	alpha_mean = 0.0
double	opaque_coverage = 0.0
double	non_background_coverage = 0.0
	Fraction of pixels that differ from the dominant background color.
std::string	error

Detailed Description

Basic content statistics for a decoded PNG.

This is intentionally separate from visual similarity: two screenshots can be byte-identical and still be useless if they are stable empty frames.

Member Function Documentation

passes_content_floor()

bool pulp::view::ScreenshotContentStats::passes_content_floor ( uint32_t min_unique_colors = 16, double min_luminance_stddev = 1.0, double min_non_background_coverage = 0.05, double min_opaque_coverage = 0.95 ) const

inline

Member Data Documentation

alpha_mean

double pulp::view::ScreenshotContentStats::alpha_mean = 0.0

error

std::string pulp::view::ScreenshotContentStats::error

height

uint32_t pulp::view::ScreenshotContentStats::height = 0

luminance_mean

double pulp::view::ScreenshotContentStats::luminance_mean = 0.0

luminance_stddev

double pulp::view::ScreenshotContentStats::luminance_stddev = 0.0

non_background_coverage

double pulp::view::ScreenshotContentStats::non_background_coverage = 0.0

Fraction of pixels that differ from the dominant background color.

This is exact unless unique_colors_capped is true, where it is still useful as an empty-frame floor but not a precise coverage metric.

opaque_coverage

double pulp::view::ScreenshotContentStats::opaque_coverage = 0.0

total_pixels

uint32_t pulp::view::ScreenshotContentStats::total_pixels = 0

unique_colors

uint32_t pulp::view::ScreenshotContentStats::unique_colors = 0

Exact count unless unique_colors_capped is true.

unique_colors_capped

bool pulp::view::ScreenshotContentStats::unique_colors_capped = false

valid

bool pulp::view::ScreenshotContentStats::valid = false

width

uint32_t pulp::view::ScreenshotContentStats::width = 0

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The documentation for this struct was generated from the following file:

• /home/runner/work/pulp/pulp/core/view/include/pulp/view/screenshot_compare.hpp