Function libjxl :: jxl :: InitialQuantField
auto InitialQuantField(float butteraugli_target, const jxl::Image3F& opsin, const FrameDimensions& frame_dim, ThreadPool* pool, float rescale, jxl::ImageF* initial_quant_mask) -> jxl::ImageF
auto InitialQuantField(const float butteraugli_target, const jxl::Image3F& opsin, const FrameDimensions& frame_dim, ThreadPool* pool, float rescale, jxl::ImageF* mask) -> jxl::ImageF