downsample_2x() [3/3]

MAYAFLUX_API 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.

Each output pixel is the average of the corresponding 2x2 block in src. Output dimensions are floor(w/2) x floor(h/2). Odd-dimension remainders are dropped. new_w and new_h are written before return.

Parameters

src	Single-channel float span, size must be w * h.
w	Input width in pixels.
h	Input height in pixels.
new_w	Receives output width (floor(w/2)).
new_h	Receives output height (floor(h/2)).

Returns

Downsampled float vector of length new_w * new_h.

Definition at line 496 of file PixelOps.cpp.

{
    new_w = w / 2;
    new_h = h / 2;
    std::vector<float> out(static_cast<size_t>(new_w) * new_h);
    downsample_2x(src, out, w, h, new_w, new_h);
    return out;
}

References downsample_2x(), h, out, and src.

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