论文标题
从边界到颠簸：关闭时（极端）轮廓至关重要
From Boundaries to Bumps: when closed (extremal) contours are critical
论文作者
论文摘要
不变的形状推断是难以捉摸的：各种形状会产生相同的图像，并且可以从相同的形状呈现各种图像。阻塞轮廓是一个罕见的例外：就表面正常而言，它既具有图像显着性，又具有表面含义。我们放宽了遮挡轮廓以定义封闭的极端曲线的概念，封闭的极端曲线是在拓扑层面存在的新形状不变的。它们围绕着凸起，这是一种常见但不明显的室内形成部分，并正式化了凸起感知的定性性质。极端曲线是可以计算的，可以从阴影，纹理和镜面材料中统一形状的推断，并预测凸起感知中的新现象。
Invariants underlying shape inference are elusive: a variety of shapes can give rise to the same image, and a variety of images can be rendered from the same shape. The occluding contour is a rare exception: it has both image salience, in terms of isophotes, and surface meaning, in terms of surface normal. We relax the notion of occluding contour to define closed extremal curves, a new shape invariant that exists at the topological level. They surround bumps, a common but ill-specified interior shape component, and formalize the qualitative nature of bump perception. Extremal curves are biologically computable, unify shape inferences from shading, texture, and specular materials, and predict new phenomena in bump perception.
