Method and apparatus for adaptive exposure bracketing, segmentation and scene organization
First Claim
1. A method for imaging a scene comprising the steps of:
- determining a camera response function based upon one or more images captured with a camera;
synthetically creating profiles of one or more pixels of the one or more images at different exposures;
determining an exposure of the one or more pixels in one or more of the one or more images resulting in a maximized chroma in accordance with at least the determined camera response function and one or more perceptual parameters resulting in color consistency;
imaging the scene at the exposure resulting in the maximized chroma; and
determining a hue associated with the one or more pixels at the exposure resulting in the maximized chroma.
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Abstract
A method, system and computer program are provided that present a real-time approach to Chromaticity maximization to be used in image segmentation. The ambient illuminant in a scene may be first approximated. The input image may then be preprocessed to remove the impact of the illuminant, and approximate an ambient white light source instead. The resultant image is then choma-maximized. The result is an adaptive Chromaticity maximization algorithm capable of adapting to a wide dynamic range of illuminations. A segmentation algorithm is put in place as well that takes advantage of such an approach. This approach also has applications in HDR photography and real-time HDR video.
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Citations
14 Claims
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1. A method for imaging a scene comprising the steps of:
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determining a camera response function based upon one or more images captured with a camera; synthetically creating profiles of one or more pixels of the one or more images at different exposures; determining an exposure of the one or more pixels in one or more of the one or more images resulting in a maximized chroma in accordance with at least the determined camera response function and one or more perceptual parameters resulting in color consistency; imaging the scene at the exposure resulting in the maximized chroma; and determining a hue associated with the one or more pixels at the exposure resulting in the maximized chroma. - View Dependent Claims (2, 3, 4)
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5. A method for imaging a scene comprising the steps of:
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determining a camera response function based upon one or more images captured with a camera; segmenting one or more regions of interest within the one or more captured images; synthetically creating profiles of one or more pixels of the one or more images at different exposures; determining an exposure of the one or more pixels in the one or more images resulting in maximized chroma in each of the one or more regions of interest in accordance with the determined camera response function; imaging the scene at the exposure resulting in the maximized chroma for one or more of the regions of interest; and determining a hue associated with the one or more pixels at the exposure resulting in the maximized chroma. - View Dependent Claims (6, 7, 8, 9)
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10. A method for imaging a scene comprising the steps of:
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determining a camera response function based upon one or more images captured with a camera; segmenting one or more regions of interest within the one or more captured images; synthetically creating profiles of one or more pixels of the one or more images comprising the one or more regions of interest at different exposures; determining an exposure of the one or more pixels in the one or more images resulting in maximized chroma in each of the one or more regions of interest in accordance with the determined camera response function; imaging the scene at each exposure resulting in a maximized chroma for each of the one or more of the regions of interest; and generating a composite depth map employing the images generated for each region of interest imaged at the exposure setting resulting in the maximized chroma for that region of interest. - View Dependent Claims (11, 12, 13, 14)
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Specification