PixelOps.hpp File Reference

Pointwise pixel operations for MayaFlux::Kinesis::Vision. More...

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Namespaces
namespace	MayaFlux
	Main namespace for the Maya Flux audio engine.
namespace	MayaFlux::Kinesis
namespace	MayaFlux::Kinesis::Vision

Functions
void	MayaFlux::Kinesis::Vision::downsample_2x (std::span< const float > src, std::span< float > dst, uint32_t w, uint32_t h, uint32_t &new_w, uint32_t &new_h)
	2x box-filter downsample writing into a caller-supplied buffer.
void	MayaFlux::Kinesis::Vision::downsample_2x (std::span< const float > src, std::span< float > dst, uint32_t w, uint32_t h, uint32_t channels, uint32_t &new_w, uint32_t &new_h)
	2x box-filter downsample for multi-channel interleaved data.
std::vector< float >	MayaFlux::Kinesis::Vision::downsample_2x (std::span< const float > src, uint32_t w, uint32_t h, uint32_t &new_w, uint32_t &new_h)
	2x box-filter downsample.
void	MayaFlux::Kinesis::Vision::gray_to_rgba (std::span< const float > gray, std::span< float > dst, uint32_t w, uint32_t h)
	Global threshold writing into caller-supplied buffer.
std::vector< float >	MayaFlux::Kinesis::Vision::gray_to_rgba (std::span< const float > gray, uint32_t w, uint32_t h)
	Convert single-channel gray to RGBA.
void	MayaFlux::Kinesis::Vision::normalize_inplace (std::span< float > data)
	Stretch values to fill [0, 1] using the span's observed min and max.
void	MayaFlux::Kinesis::Vision::normalize_range_inplace (std::span< float > data, float lo, float hi)
	Clamp and remap values from [lo, hi] to [0, 1] in-place.
void	MayaFlux::Kinesis::Vision::rgba_to_gray (std::span< const float > rgba, std::span< float > dst, uint32_t w, uint32_t h)
	Convert RGBA to luminance gray using BT.601 coefficients.
std::vector< float >	MayaFlux::Kinesis::Vision::rgba_to_gray (std::span< const float > rgba, uint32_t w, uint32_t h)
	Convert RGBA to luminance gray using BT.601 coefficients.
void	MayaFlux::Kinesis::Vision::rgba_to_hsv (std::span< const float > rgba, std::span< float > dst, uint32_t w, uint32_t h)
	Convert RGBA to HSV writing into caller-supplied buffer.
std::vector< float >	MayaFlux::Kinesis::Vision::rgba_to_hsv (std::span< const float > rgba, uint32_t w, uint32_t h)
	Convert RGBA to HSV.
std::vector< float >	MayaFlux::Kinesis::Vision::threshold (std::span< const float > gray, float value)
	Global threshold: output is 1.0f where input >= value, else 0.0f.
void	MayaFlux::Kinesis::Vision::threshold (std::span< const float > gray, std::span< float > dst, float value)
	Global threshold writing into caller-supplied buffer.
void	MayaFlux::Kinesis::Vision::threshold_adaptive (std::span< const float > gray, std::span< float > dst, uint32_t w, uint32_t h, uint32_t block_size, float offset)
	Adaptive threshold writing into caller-supplied buffer.
std::vector< float >	MayaFlux::Kinesis::Vision::threshold_adaptive (std::span< const float > gray, uint32_t w, uint32_t h, uint32_t block_size, float offset)
	Adaptive threshold using local block mean minus offset.
std::vector< float >	MayaFlux::Kinesis::Vision::threshold_otsu (std::span< const float > gray)
	Otsu threshold: finds the optimal global threshold by maximising inter-class variance, then applies it.
void	MayaFlux::Kinesis::Vision::threshold_otsu (std::span< const float > gray, std::span< float > dst)
	Otsu threshold writing into caller-supplied buffer.

Detailed Description

Pointwise pixel operations for MayaFlux::Kinesis::Vision.

Pure functions operating on contiguous normalised float spans. No MayaFlux type dependencies beyond std.

Conventions

• All inputs are normalised float in [0, 1]
• RGBA layout: r, g, b, a interleaved, 4 floats per pixel
• Gray layout: 1 float per pixel
• w and h are pixel dimensions; callers are responsible for ensuring span size == w * h * channels
• Parallelism is handled internally via std::execution::par_unseq
• No allocation inside functions except for the returned vector

Definition in file PixelOps.hpp.