Most digital images intended for viewing are generally assumed to be in sRGB colour space, which is gamma-encoded. This means that a linear increase of value in colour space does not correspond to a linear increase in actual physical light intensity, instead following more of a curve. If we want to mathematically operate on colour values in a physically accurate way, we must first convert them to linear space by applying gamma decompression. After processing, gamma compression should be reapplied before display. The following C code demonstrates how to do so following the sRGB standard:
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美國是全球少數積極執行強迫勞動進口禁令的國家之一。根據《1930年關稅法》第307條，美國海關暨邊境保護局可在「合理懷疑」商品涉及強迫勞動時，禁止其進口並發布暫扣令，必要時還可課以罰款或要求企業提供資訊。
两汉至北朝近800年的风云变幻，在东魏北齐时代的邺城画上了一个句号，最终奠定了隋唐盛世的文化基因。