Interleaved gradient noise is a form of low-discrepancy sequence that attempts to distribute values more evenly across space when compared to pure white noise[9].
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 :
。关于这个话题，WPS官方版本下载提供了深入分析
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其实当豆包手机火到海外之后，就有网友开始畅想，如果 Google 在 Pixel 以及 Android 手机上推广这个技术，那前景将会非常广阔。