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 :
Helium is used to pressurize tanks and help push fuel into the engines. Without proper helium flow, the rocket cannot safely fly. Because the upper stage is hard to reach at the launchpad, NASA rolled the stacked rocket back into the Vehicle Assembly Building, the sky-scraping hangar where it was originally put together.
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Liverpool’s wage bill increased by £42m to £428m in the year ending 31 May 2025, when a Premier League title triumph in Arne Slot’s debut season as head coach and a return to the Champions League increased revenue to a record £703m. The club’s wages-to-revenue ratio stood at a healthy 61%. It was the biggest wage bill in the division, ahead of Manchester City on £408m, and included bonuses for the record-equalling title triumph.，更多细节参见safew官方下载
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