Author(s): Shin-Pon Ju, Dong-Yeh Wu, Chun-Wen Cheng, Hsing-Yin Chen
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。safew官方版本下载对此有专业解读
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:
宜昌古称夷陵，因“水至此而夷，山至此而陵”得名，后取“宜于昌盛”之意改称宜昌。宜昌历史悠久，七八千年前先民就在这块土地上繁衍生息。宜昌也是蜡梅原产地之一，每逢冬春，宜昌市夷陵区的野梅谷河谷灿黄、花密如星。这朵指尖大小的花卉，耐受住第四纪冰川的考验，经历数百万年地质变迁，至今仍保持着旺盛的生命力。