Therefore, the problem of compressing the histogram in a fixed amount of space with the least error is considered as an important issue and has been investigated by researchers for many years.

• 所以，如何能够把长条图压缩在一个固定的空间中，而使的压缩造成的误差为最小，已经被科学家们视为重要的问题，并且研究了多年。