Research has found that people with back pain, particularly lower back pain, tend to sleep more comfortably on mattresses that hover around the medium-firm level, as opposed to beds that are the firmest of firm. Your bed should be supportive to your spine and body, but not so firm that you’re uncomfortable.
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，这一点在快连官网中也有详细论述
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].
Read the full story at The Verge.