Patent
Method for improving digital images and an image sensor for sensing the same
TLDR
In this article, the authors presented an image processing method that provides discontinuity-preserving image smoothing and segmentation, noise reduction, reduction of image variations particularly those variations caused by illumination conditions, exposure compensation, and dynamic range compression.Abstract:
The present invention provides an image processing method. In one embodiment, the method provides discontinuity-preserving image smoothing and segmentation, noise reduction, reduction of image variations particularly those variations caused by illumination conditions, exposure compensation, and dynamic range compression. The present invention also provides an electronic image sensor that is able to detect high dynamic range optical images and produce electronic images with reduced dynamic range.read more
Citations
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Patent
High dynamic range images from low dynamic range images
Scott J. Daly,Laurence Meylan +1 more
TL;DR: In this article, a method for displaying an image includes receiving an image having a first luminance dynamic range and modifying the image to a second-level dynamic range free from being based upon other images, where the second dynamic range is greater than the first dynamic range.
Patent
Digital image processing and systems incorporating the same
TL;DR: In this article, a localized operator is applied to the tone mapping compression factor which enhances apparent image contrast in the low dynamic range output of the tone map, and the algorithm is shown to improve the quality of tone mapping using the bilateral filter.
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Image processing method and image processing apparatus
TL;DR: In this paper, the authors present an image processing method which includes recording an image by irradiating a recording medium with laser beams which are arrayed in parallel at predetermined intervals to heat the recording medium, so that the image is composed of a plurality of lines written with the laser beams.
Patent
High dynamic range data format conversions for digital media
Sridhar Srinivasan,Zhi Zhou +1 more
TL;DR: In this article, the authors define one or more continuous mappings at a digital media encoder to convert input digital media data in a first high dynamic range format to a second format with a smaller dynamic range than the first format.
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Visual processing device, visual processing method, program, display device, and integrated circuit
TL;DR: In this paper, a visual processing device is provided with a spatial processing portion extracting surrounding image information US from an input image signal IS, and a special image detection portion outputting a special effect adjustment signal DS according to a degree of a statistical bias of the image signal.
References
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Journal ArticleDOI
Stochastic Relaxation, Gibbs Distributions, and the Bayesian Restoration of Images
Stuart Geman,Donald Geman +1 more
TL;DR: The analogy between images and statistical mechanics systems is made and the analogous operation under the posterior distribution yields the maximum a posteriori (MAP) estimate of the image given the degraded observations, creating a highly parallel ``relaxation'' algorithm for MAP estimation.
Journal ArticleDOI
Scale-space and edge detection using anisotropic diffusion
Pietro Perona,Jitendra Malik +1 more
TL;DR: A new definition of scale-space is suggested, and a class of algorithms used to realize a diffusion process is introduced, chosen to vary spatially in such a way as to encourage intra Region smoothing rather than interregion smoothing.
Proceedings ArticleDOI
Bilateral filtering for gray and color images
Carlo Tomasi,Roberto Manduchi +1 more
TL;DR: In contrast with filters that operate on the three bands of a color image separately, a bilateral filter can enforce the perceptual metric underlying the CIE-Lab color space, and smooth colors and preserve edges in a way that is tuned to human perception.
Journal ArticleDOI
Lightness and Retinex Theory
Edwin H Land,John J. McCann +1 more
TL;DR: The mathematics of a lightness scheme that generates lightness numbers, the biologic correlate of reflectance, independent of the flux from objects is described.
Journal ArticleDOI
A multiscale retinex for bridging the gap between color images and the human observation of scenes
TL;DR: This paper extends a previously designed single-scale center/surround retinex to a multiscale version that achieves simultaneous dynamic range compression/color consistency/lightness rendition and defines a method of color restoration that corrects for this deficiency at the cost of a modest dilution in color consistency.