Industrial production of kanten (the Japanese name for agar, which translates as “cold weather” or “frozen sky”) began in Japan in the mid-19th century by natural freeze drying, a technique that simultaneously dehydrates and purifies the agar. Seaweed is first washed and boiled to extract the agar, after which the solution is filtered and placed in boxes or trays at room temperature to congeal. The jelly is then cut into slabs called namaten, which can be further processed into noodle-like strips by pushing the slabs through a press. These noodles are finally spread out in layers onto reed mats and exposed to the sun and freezing temperatures for several weeks to yield purified agar. Although this traditional way of producing kanten is disappearing, even today’s industrial-scale manufacturing of agar relies on repeated cycles of boiling, freezing, and thawing.
据环球网消息，2月26日，微信员工“客村小蒋”透露，微信已上线一项新功能：用户长按聊天里的图片、视频或文件，可通过“查看该图片/视频/文件包含的聊天”，查看其在多少个聊天中被使用。该功能同时明确提示：同一图片、视频和文件在多个聊天使用时，不会重复占用存储空间。微信团队表示，此举是从界面上让用户直观感知，文件只是被多次引用，并非重复存储，以此缓解用户对手机存储空间的顾虑。（环球网）
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One by-product of weighing the candidates by their distance is that the resulting output image is prone to false contours or banding. Increasing reduces this effect at the cost of added granularity or high frequency noise due to the introduction of ever more distant colours to the set. I recommend taking a look at the original paper if you’re interested in learning a bit more about the algorithm[1].
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