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This year’s festival, which opens on 10 March, will be the second since Guy Lavender took over as Cheltenham’s chief executive at the start of 2025, but the first at which it should be possible to assess the effect of a range of initiatives to improve the customer experience that have been introduced over the last 15 months.
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: