Silhouette Coefficient

下面左边和中间的画是silhouette, 最右边的不是：

  

[LDOCE] silhouette: a dark image, shadow, or shape that you see against a light background

Date: 1700-1800; Language: French; Origin: , from étienne de Silhouette (1709-67), French politician famous for not liking to spend money, and therefore appropriately giving his name to a cheap simple picture. 

与sum of squares (SS)相比，Silhouette Coefficient的计算好像比较cheap和simple，由此得名？轮廓系数 - 百度百科

contour

1. the shape of the outer edges of something such as an area of land or someone's body
2. a line on a map that shows points that are of equal heights above sea level (also contour line)

 

最左边图片的标题是Male silhouette and contour，我觉得写反了。

轮廓：表示物件或人像外形的线条。廓：物体的周围、外缘：轮～。耳～；古同“郭”，外城。

剪影 - 百度百科：依照人脸或人体及其他物体的轮廓剪纸成形谓之剪影。

[牛津词典] silhouette: 黑色轮廓; 侧影; 黑色轮廓像; 剪影

The skeleton of the cube (the vertices and edges) form a graph, with 8 vertices, and 12 edges. cube

Corner detection, an important task in computer vision. A corner can be defined as the point where two non-parallel edges meet, or ought to meet. corner

Edge detection includes a variety of mathematical methods that aim at identifying edges, curves in a digital image at which the image brightness changes sharply or, more formally, has discontinuities. The same problem of finding discontinuities in one-dimensional signals is known as step detection and the problem of finding signal discontinuities over time is known as change detection. Edge detection is a fundamental tool in image processing, machine vision and computer vision, particularly in the areas of feature detection and feature extraction.

boycott [Date: 1800-1900; Origin: Charles Boycott (1832-97), English official in Ireland who refused to reduce rents, so the local people refused to do any business with him]

sandwich [Date: 1700-1800; Origin: Earl of Sandwich (1718-92), who ate sandwiches so that he could continue gambling without leaving the table]

六级/考研单词: shade, fame, thereby, outer, skull, cube, graph, detect, compute, mathematics, curve, digit, extract, boycott, gamble