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US 8,942,471 B2Granted
Color sequential flash for digital image acquisition
AssigneeKoninklijke Philips N.V.
InventorVolkmar Schulz
Life of this patent
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Abstract
A method and a System to obtain a more realistic image of an object by acquiring a plurality of e.g. monochromatic images without increasing the structure of a, for example, charged coupled device array by a sequential acquisition of the images by using a color sequential flash.
Claims17
A system for providing an improved imaging of an object, the system comprising:
- a plurality of light sources adapted for illuminating the object during a plurality of illumination periods, wherein each of the plurality of light sources is adapted to emit light having at least two different wavelengths during the illumination period in which the light source is illuminated;
- a controlling unit adapted for controlling the plurality of light sources so that different light sources of the plurality of light sources illuminate the object in each of a plurality of subsequent illumination periods, such that the object is illuminated by different wavelengths during each subsequent illumination period, wherein at least a part of the plurality of light sources are arranged such that the illumination is carried out in a substantially equal angle of incidence for the corresponding wavelengths;
- an acquiring unit adapted for detecting light reflected from the illuminated object and acquiring at least four sets of image data of the object in the plurality of subsequent illumination periods;
- and a reconstruction unit adapted for combining the at least four acquired sets of image data into a reconstructed set of image data of the object, wherein the reconstructed set of image data of the object comprises an at least four-dimensional color space.
1 more element
A method for providing an improved imaging of an object, the method comprising:
- illuminating the object with a plurality of light sources in a plurality of subsequent illumination periods, wherein each of the plurality of light sources is adapted to emit light having at least two different wavelengths during the illumination period in which the light source is illuminated, and wherein in at least two of the plurality of subsequent illumination periods the object is illuminated by different light sources of the plurality of light sources such that the object is illuminated by different wavelengths during subsequent illumination periods, wherein the illumination is carried out in a substantially equal angle of incidence for each of the different wavelengths;
- acquiring at least four sets of image data of the object from light reflected from the illuminated object in the plurality of subsequent illumination periods, and reconstructing all of the at least four acquired sets of image data into a reconstructed set of image data of the object, wherein the reconstructed set of image data of the object comprises an at least four-dimensional color space.
Dependencies are inferred from the claim text.