Abstract: The present disclosure advantageously provides apparatus, systems and methods which facilitate estimating and accounting for illumination conditions, viewing conditions and reflectance characteristics for imaged surfaces when performing color measurement, correction and/or transformation in an imaging process, such as photography. Advantageously, the disclosed apparatus, systems and methods may utilize a set of one or more illumination target elements for extrapolating illumination conditions from an imaged scene. The disclosure may be used to improve determination of color correction/transformation parameters and/or to facilitate determining a reflectance model for a target surface of interest.

Abstract: Exemplary embodiments of the present disclosure are related to a color target and methods and systems for estimating a spectral reflectance of the color target based on an image of the color target. The color target can include a substrate having a target surface, a sample window formed in the substrate and defining perimeter within which a sample surface is disposed, and one or more filters disposed the sample surface. The one or more filters are configured to cover a first portion of the sample surface, while leaving a second portion of the sample surface uncovered.

Abstract: Exemplary embodiments of the present disclosure are related to a color target and methods and systems for estimating a spectral reflectance of the color target based on an image of the color target. The color target can include a substrate having a target surface, a sample window formed in the substrate and defining perimeter within which a sample surface is disposed, and one or more filters disposed the sample surface. The one or more filters are configured to cover a first portion of the sample surface, while leaving a second portion of the sample surface uncovered.

Abstract: The present disclosure advantageously provides apparatus, systems and methods which facilitate estimating and accounting for illumination conditions, viewing conditions and reflectance characteristics for imaged surfaces when performing color measurement, correction and/or transformation in an imaging process, such as photography. Advantageously, the disclosed apparatus, systems and methods may utilize a set of one or more illumination target elements for extrapolating illumination conditions from an imaged scene. The disclosure may be used to improve determination of color correction/transformation parameters and/or to facilitate determining a reflectance model for a target surface of interest.

Abstract: A color measurement device includes an error detection function for color printing control. The color measurement device includes an optical measurement head, the optical measurement head being moveable linearly along a color bar region of a printing sheet, and being configured for making color measurements with respect to the color bar, and for detecting color measurement errors by determining whether such color measurements are being made at least in part with respect to regions of the printing sheet other than the color bar region. The optical measurement head may further include a pixel array for tracking a center trajectory of the color bar for purposes of detecting the color measurement errors, and a color measurement engine for purposes of making the color measurements with respect to the color bar. The color measurement device may further include a motion control element and a mechanical track to guide the optical measurement head along the color bar region.

Abstract: A color measurement device includes an error detection function for color printing control. The color measurement device includes an optical measurement head, the optical measurement head being moveable linearly along a color bar region of a printing sheet, and being configured for making color measurements with respect to the color bar, and for detecting color measurement errors by determining whether such color measurements are being made at least in part with respect to regions of the printing sheet other than the color bar region. The optical measurement head may further include a pixel array for tracking a center trajectory of the color bar for purposes of detecting the color measurement errors, and a color measurement engine for purposes of making the color measurements with respect to the color bar. The color measurement device may further include a motion control element and a mechanical track to guide the optical measurement head along the color bar region.