到了奉节后,詹姆斯发现,吸引他的不止是诗意山水。在这里,他既能漫步古迹,也能体验直升机观光,传统与现代交织,旅行体验丰富立体。2025年,奉节接待境外游客5.86万人次,同比增长近2倍。
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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