pixel[0] = pixel[0] 0.04045f ? powf((pixel[0] + 0.055f) / 1.055f, 2.4f) : pixel[0] / 12.92f;
A low threshold preserves detail (more leaf nodes, less compression). A high threshold merges aggressively (fewer leaves, more compression, but the image gets blocky). The grid overlay shows the quadtree structure: large cells in uniform areas, small cells where detail is preserved.
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force alignment (even though compilers are smart enough to do this) because
"Retaining the flow of used petrol and diesel vehicles into the island will help enable a more just transition for islanders, ensuring the burden of change does not unnecessarily impact on those worst off".