Edward H. Adelson

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A motion sequence may be represented as a single pattern in x-y-t space; a velocity of motion corresponds to a three-dimensional orientation in this space. Motion sinformation can be extracted by a system that responds to the oriented spatiotemporal energy. We discuss a class of models for human motion mechanisms in which the first stage consists of linear(More)
Oriented lters are useful in many early vision and image processing tasks. One often needs to apply the same lter, rotated to di erent angles under adaptive control, or wishes to calculate the lter response at various orientations. We present an e cient architecture to synthesize lters of arbitrary orientations from linear combinations of basis lters,(More)
We describe a system for representing moving images with sets of overlapping layers. Each layer contains an intensity map that defines the additive values of each pixel, along with an alpha map that serves as a mask indicating the transparency. The layers are ordered in depth and they occlude each other in accord with the rules of compositing. Velocity maps(More)
infinite images of itself; and these, by infinite pyramids diffused in the air, represent this body throughout space and on every side. Each pyramid that is composed of a long assemblage of rays includes within itself an infinite number of pyramids and each has the same power as all, and all as each. – The Notebooks of Leonardo da Vinci In M. Landy and J.(More)
The perceived brightness of a gray patch depends on the surrounding context. For example, a medium-gray patch appears darker when placed on a bright background and brighter when placed on a dark background. Models to explain these effects are usually based on simple low-level mechanisms. A new set of brightness illusions cannot be explained by such models.(More)
A gray surface in sunlight may have much higher luminance than it has in the shade, but it still looks gray. To achieve the task of “lightness constancy,” the visual system must discount the illumination and other viewing conditions and estimate the reflectance. Many different physical situations, such as shadows, filters, or haze, can be combined to form a(More)
Orthogonal wavelet transforms have recently become a popular representation for multi-scale signal and image analysis. One of the major drawbacks of these representations is their lack of translation invariance: the content of wavelet subbands is unstable under translations of the input signal. Wavelet transforms are also unstable with respect to dilations(More)
The intrinsic image decomposition aims to retrieve “intrinsic” properties of an image, such as shading and reflectance. To make it possible to quantitatively compare different approaches to this problem in realistic settings, we present a ground-truth dataset of intrinsic image decompositions for a variety of real-world objects. For each(More)