Image RGB Channel Percentiles Report
Report visible red, green, and blue p5, median, and p95 bytes independently.
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Report visible red, green, and blue p5, median, and p95 bytes independently.
Report pairwise population Pearson correlation across visible RGB samples.
Report visible RGB means and the population covariance matrix in squared-byte units.
Report mean decoded luminance and its root mean square deviation.
Rotate images clockwise in exact quarter-turns.
Scale still-image colour intensity around calculated luminance.
Locate alpha-weighted decoded HSL saturation in pixel and normalized coordinates.
Report mean HSL saturation and fixed low- and high-band coverage.
Attenuate alternating decoded rows by an adjustable amount while preserving alpha.
Apply a bounded warm sepia matrix to a still image while preserving alpha.
Adjust low- and high-luminance ranges with independent smooth weights.
Increase local edge contrast with a guarded convolution.