Accidental Pinhole and Pinspeck Cameras
Accidental Pinhole and Pinspeck Cameras
复制标题
意外的针孔和细斑点相机
DOI：
10.1007/s11263-014-0697-5
复制
发表时间：
2012
影响因子：
19.5
通讯作者：
W. Freeman
中科院分区：
文献类型：
--
作者：
A. Torralba;W. Freeman
我们确定和研究两种类型的“偶然”的图像，可以在场景中形成。第一个是偶然的针孔摄像头图像。第二类偶然图像是“逆”针孔相机图像，其通过从没有遮挡物的参考图像中减去存在小遮挡物的图像而形成。这两种类型的意外相机发生在各种不同的情况。例如，由自然光照亮的室内场景，一个人在建筑物阴影下行走的街道等，偶然相机产生的图像经常被误认为是阴影或相互反射。然而，偶然的图像可以揭示关于图像之外的场景、照明条件或光进入场景的孔径的信息。
We identify and study two types of “accidental” images that can be formed in scenes. The first is an accidental pinhole camera image. The second class of accidental images are “inverse” pinhole camera images, formed by subtracting an image with a small occluder present from a reference image without the occluder. Both types of accidental cameras happen in a variety of different situations. For example, an indoor scene illuminated by natural light, a street with a person walking under the shadow of a building, etc. The images produced by accidental cameras are often mistaken for shadows or interreflections. However, accidental images can reveal information about the scene outside the image, the lighting conditions, or the aperture by which light enters the scene.