Perceptual luminance nonlinearity-based image data exchange across different display capabilities
First Claim
1. A method performed on one or more processors comprising:
- receiving a perceptual curve digital code value D for an image;
determining a normalized perceptual curve signal value V from a perceptual curve digital code value D, the perceptual curve digital code value D excludes reserved code values;
determining a normalized color component value C based on a functional model of
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Abstract
A handheld imaging device has a data receiver that is configured to receive reference encoded image data. The data includes reference code values, which are encoded by an external coding system. The reference code values represent reference gray levels, which are being selected using a reference grayscale display function that is based on perceptual non-linearity of human vision adapted at different light levels to spatial frequencies. The imaging device also has a data converter that is configured to access a code mapping between the reference code values and device-specific code values of the imaging device. The device-specific code values are configured to produce gray levels that are specific to the imaging device. Based on the code mapping, the data converter is configured to transcode the reference encoded image data into device-specific image data, which is encoded with the device-specific code values.
77 Citations
14 Claims
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1. A method performed on one or more processors comprising:
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receiving a perceptual curve digital code value D for an image; determining a normalized perceptual curve signal value V from a perceptual curve digital code value D, the perceptual curve digital code value D excludes reserved code values; determining a normalized color component value C based on a functional model of - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method performed on one or more processors comprising:
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receiving a perceptual curve digital code value D for an image; determining a normalized perceptual curve signal value V from a perceptual curve digital code value D, the perceptual curve digital code value D excludes reserved code values; determining a normalized luminance value Y based on a functional model of - View Dependent Claims (9, 10, 11, 12, 13, 14)
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Specification