signed distance

基本解釋

The algorithm fits the signed distance field of the source point set with an algebraic B-spline function and the zero set of the algebraic B-spline function is the constructed curve.
該方法用一個(gè)代數(shù)B-樣條函數(shù)擬合原始點(diǎn)云的內(nèi)蘊(yùn)有向距離場，并以該代數(shù)函數(shù)的零點(diǎn)集所在的代數(shù)B-樣條曲線作為重建結(jié)果。
And the traditional level set methods must re-initialize level set functions costly so that level set functions can be close to a SDF (Signed Distance Function) and image can be effectively segmented.
另外，在傳統(tǒng)的水平集方法中，必須要進(jìn)行復(fù)雜的水平集的重新初始化以確保水平集函數(shù)在迭代過程中保持為符號距離函數(shù)SDF，從而確?？傻玫揭粋€(gè)有效的結(jié)果。
Using cache technology, by which the evaluated signed distance from vertices of the cell to the isosurface are saved and copied into its neighboring cells, can improve the efficiency of the algorithm.
采用緩存技術(shù)記錄已處理過體元的頂點(diǎn)信息，避免了重復(fù)計(jì)算，從而提高了重建的效率。

Signed Distance Function 符號距離函數(shù);函數(shù);有符號距離函數(shù);現(xiàn)在該函數(shù)屬于符號距離函數(shù)
Signed distance field 有向距離場
Signed Distance Field shadows 帶符號的距離場陰影

符號距離
Traditional level set active contours represent their contours by the zero level sets of the level set functions, which is set to be signed distance functions.
傳統(tǒng)水平集活動(dòng)輪廓模型采用傳統(tǒng)水平集函數(shù)的零水平集來表示模型的輪廓線,其中傳統(tǒng)水平集函數(shù)被設(shè)置為關(guān)于其零水平集的符號距離函數(shù)。
有向距離
A new and fast signed distance computaion algorithm from point to triangle is proposed.
本文提出一種新的快速的點(diǎn)到三角面片有向距離計(jì)算的算法。