منابع مشابه
Spectral sharpening by spherical sampling.
There are many works in color that assume illumination change can be modeled by multiplying sensor responses by individual scaling factors. The early research in this area is sometimes grouped under the heading "von Kries adaptation": the scaling factors are applied to the cone responses. In more recent studies, both in psychophysics and in computational analysis, it has been proposed that scal...
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Spectral sharpening is a method for developing camera or other optical-device sensor functions that are more narrowband than those in hardware, by means of a linear transform of sensor functions. The utility of such a transform is that many computer vision and color-correction algorithms perform better in a sharpened space, and thus such a space can be used as an intermediate representation for...
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The choice of local HARDI reconstruction technique is crucial for discerning multiple fiber orientations, which is itself of substantial importance for tractography, and reliable and accurate assessment of white matter fiber geometry. Due to the complexity of the diffusion process and its milieu, distinct diffusion compartments can have different frequency signatures, making the HARDI signal sp...
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Color sensors in scanners and color copiers are not colorimetric | RGB values are not a linear transformation away from device{independent XYZ tristimu-lus values. For a given set of targets or dyes one can readily nd a best linear transform or use interpolation. However, when the possible targets are unknown, a data-independent transform is needed. Here, we set out a very simple linear transfo...
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The Bradford chromatic adaptation transform, empirically derived by Lam [1], models illumination change. Specifically, it provides a means of mapping XYZs under a reference source to XYZs for a target light such that the corresponding XYZs produce the same perceived colour. One implication of the Bradford chromatic adaptation transform is that colour correction for illumination takes place not ...
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ژورنال
عنوان ژورنال: Journal of the Optical Society of America A
سال: 2012
ISSN: 1084-7529,1520-8532
DOI: 10.1364/josaa.29.001199