System and method for display device characterization, calibration, and verification
First Claim
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1. A system for creating characterization information for a first display device for use with a second display device comprising:
- a computer readable medium in communications with said first display device; and
,a set of computer readable instructions embodied in computer readable medium for initializing lookup table values representing default luminance levels of said first display device, measuring the output of said first display device according to said initial lookup table values, determining a gray ramp according to said output measurements, mapping said gray ramp to L* of CIELAB color model of said first display device, adjusting said lookup table values according to said gray ramp mapping and L*, measuring RGB color map information, and determining an ICC profile according to said gray ramp and said RGB color map information.
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Abstract
This invention is directed to a system and method for creating characterization information from a first display device that can be transmitted and used by a second display device. Computer readable instructions embodied in a computer readable medium calibrate a first display device, create an ICC color profile from said calibration information, storing the ICC color profile and sending the ICC color profile to a second display device for it to use. The calibration or characterization information can also be associated with an image file and sent to a second location for display.
22 Citations
29 Claims
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1. A system for creating characterization information for a first display device for use with a second display device comprising:
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a computer readable medium in communications with said first display device; and
,a set of computer readable instructions embodied in computer readable medium for initializing lookup table values representing default luminance levels of said first display device, measuring the output of said first display device according to said initial lookup table values, determining a gray ramp according to said output measurements, mapping said gray ramp to L* of CIELAB color model of said first display device, adjusting said lookup table values according to said gray ramp mapping and L*, measuring RGB color map information, and determining an ICC profile according to said gray ramp and said RGB color map information. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A system for calibrating a first display device, having at least one lookup table, comprising:
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a computer readable medium in communications with said first display device; and
,a set of computer readable instructions embodied in said computer readable medium for initializing said at least one lookup table of said first display device to default values according to a predetermined white point, measuring the output of said first display device using a display measuring device, modifying said at least one lookup table according to said measured output until desired white point values are obtained, creating a gray ramp by mapping gray values from said measurements of said first display device against L* of CIELAB color model, adjusting said at least one lookup table according to said gray ramp, measuring the RGB color volume of said first display device, determining the gamut map of said first display device, and creating an ICC color profile according to said measured RGB color volume, said gray ramp, said at least one lookup table, and said gamut map. - View Dependent Claims (11, 12, 13, 14)
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15. A method for creating characterization information for a first display device for use with a second display device comprising the steps of:
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initializing lookup table values of said first display device; measuring the output of said first display device resulting in display device measurements; determining a gray ramp according to said measurements; mapping said gray ramp to L* of the CIELAB color model; adjusting said lookup table values according to said gray ramp mapping; and
,determining an ICC color profile according to said gray ramp and said adjusted lookup tables. - View Dependent Claims (16, 17, 18, 19, 20)
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21. A method for creating characterization information for a first display device for use with a second display device comprising the steps of:
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initializing lookup table values of said first display device; segmenting said first display device into a plurality of grid areas; measuring the output of at least one said grid area; determining a gray ramp according to said measurements; mapping said gray ramp to L* of the CIELAB color model; adjusting said lookup table values according to said gray ramp mapping; determining an ICC color profile according to said gray ramp and said adjusted lookup table values. - View Dependent Claims (22)
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23. A system for verifying whether a second display device can correctly display an electronic image received from a first display comprising:
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a first computer readable non-transitory medium in communications with said first display device; a second computer readable non-transitory medium in communications with said second display and said first computer readable medium; an electronic image stored in an electronic image file on said first computer readable non-transitory medium having L* values associated with said electronic image; a set of first computer readable instructions embodied in said first computer readable non-transitory medium for retrieving said electronic image file from said first computer readable medium, retrieving said L* values from said first computer readable medium, retrieving a grey ramp from said first computer readable medium, mapping said L* values to said grey ramp of said first display device thereby creating characterization values, attached said characterization values to said electronic image file and transmitting said electronic image file with said characterization values to said second computer readable non-transitory medium; and
,a set of second computer readable instructions embodied in said second computer readable non-transitory medium for receiving said electronic image file and said characterization values and determining whether said second display device can correctly display said electronic image according to said characterization values. - View Dependent Claims (24, 25, 26, 27, 28, 29)
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Specification