Instead of perturbing each pixel in the input image at random, we can choose to dither by a predetermined amount depending on the pixel’s position in the image. This can be achieved using a threshold map; a small, fixed-size matrix where each entry tells us the amount by which to perturb the input value , producing the dithered value . This matrix is tiled across the input image and sampled for every pixel during the dithering process. The following describes a dithering function for a 4×4 matrix given the pixel raster coordinates :
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The glistening golden ram’s head would seemingly be worthy of any museum, but it remains hidden within the regiment’s mess at Larkhill in Wiltshire.
陆逸轩：因为那让你意识到，原来有人也曾经经历过类似的情感，并且把它们写了下来，用音乐表达了出来。