sample()

Kinesis::Vision::FieldSample MayaFlux::Yantra::VisionExtractor::sample	(	const std::shared_ptr< Core::VKImage > &	source,
		const Kinesis::Vision::VisionAnalysis &	analysis,
		uint32_t	source_w,
		uint32_t	source_h
	)

Mean, min and max over the focused element or track/keypoint bounds.

Definition at line 483 of file VisionExtractor.cpp.

{
    const auto region = region_for_analysis(analysis);
    if (!region)
        return {};
 
    const auto rect = pixel_rect(*region, source_w, source_h);
 
    auto& ctx = reduce_context();
    use_shader(ctx, "region_sample_batch.comp.spv", k_wg_reduce, sizeof(BatchCountPC));
    ctx.stage_image(source);
    ctx.set_binding_data(3, std::span<const uint32_t>(rect));
    ctx.set_push_constants(BatchCountPC { .count = 1 });
 
    const auto raw = dispatch_reduce(ctx, 256, 3 * sizeof(glm::vec4));
    return raw.size() >= 12 ? field_sample(raw.data()) : Kinesis::Vision::FieldSample {};
}

References reduce_context(), and region_for_analysis().

Referenced by run_operation().

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