Pre-tax profits across IAG increased by 20% to €4.5bn (£3.9bn), with record operating profits on margins of more than 15% at BA and its sister airline Iberia.
Another way to approach dithering is to analyse the input image in order to make informed decisions about how best to perturb pixel values prior to quantisation. Error-diffusion dithering does this by sequentially taking the quantisation error for the current pixel (the difference between the input value and the quantised value) and distributing it to surrounding pixels in variable proportions according to a diffusion kernel . The result is that input pixel values are perturbed just enough to compensate for the error introduced by previous pixels.
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遂想起王安石所言：“贫者不得行礼，贵者得行无礼。”——意思是，普通人有心无力，对天下风俗礼仪，即便想认真隆重，也起不了什么作用；而有权有钱人有条件，却恰恰不带头淳化隆厚风习礼俗，反而争相毁弃文雅、蔑视礼仪，甚至不以粗鄙为耻，反以为荣。这是很危险的，王荆公将此列为末世风俗。
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