When he was five years old, his father died in a car accident.
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 :，这一点在heLLoword翻译官方下载中也有详细论述
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Two tunnels, each 1.8 miles (3km) long, will bring in 120,000 litres of water every second to Hinkley's cooling system
Hurdle Word 5 answerKNOWN，更多细节参见51吃瓜