So separating the wheat from the chaff means keeping what is

英语翻译
The new trains can cover the 45 kilometers separating the two towns in half time it takes GR`s(Gaelic Railways) current trains

英语翻译
Figure-ground segmentation is the process of separating the objects of interest(humans) from the rest of the image(the background).Methods for figure-ground segmention are often applied as the first step in many systems and therefore a crucial process.Recent advances are mostly a result of expanding existing methods.We categorize these methods in accordance with the type of image measurements the segmentation is based on:motion,appearance.shape,or depth data.Before describing these we first review recent advances in background subtraction as this has become the initial step in many tracking algorithms.
Background subtraction
Up until the late 90s background subtraction was known as a powerful preprocessing step but only in controlled indoor environments.In 1998,Stauffer and Grimson presented the idea of representing each pixel by a mixture of Gaussians during run-time.This allows background subtraction to be used in outdoor environments.Normally the updating was done recursively,which can model slow changes in a scene,but not rapid changes like clouds.The method by Stauffer and Grimson has today become the standard of advances have been seen which can be divided into background representation,classification.background updating,and background initialization.

The third anniversary moment after separating .missing you.I prefer to lie to you,because I thin...
The third anniversary moment after separating .missing you.I prefer to lie to you,because I think it will be a white lie.

高二英语改错题
It is an imaginary line separating the eastern and western halves of the world