COLOR-ADJUSTMENT TECHNIQUE FOR VIDEO PLAYBACK
First Claim
1. A system, comprising one or more integrated circuits, wherein the one or more integrated circuits are configured to:
- receive a video image; and
determine an intensity setting of a light source based on at least a portion of the video image, the light source configured to illuminate a display that is configured to display video images;
modify brightness values of pixels in at least a portion of the video image to maintain a product of the intensity setting and a transmittance associated with the modified video image; and
adjust color content in the video image based on the intensity setting to maintain the color associated with the video image even as the spectrum associated with the light sources varies with the intensity setting.
1 Assignment
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Accused Products
Abstract
Embodiments of a system that includes one or more integrated circuits are described. During operation, the system receives a video image. Then, the system jointly modifies brightness values of pixels in at least a portion of the video image and an intensity setting of a light source to maintain light output from a display while reducing power consumption by the light source, where the light source is configured to illuminate the display that is configured to display video images. Next, the system adjusts color content in the video image to correct for a dependence of a spectrum of the light source on the intensity setting.
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Citations
25 Claims
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1. A system, comprising one or more integrated circuits, wherein the one or more integrated circuits are configured to:
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receive a video image; and determine an intensity setting of a light source based on at least a portion of the video image, the light source configured to illuminate a display that is configured to display video images; modify brightness values of pixels in at least a portion of the video image to maintain a product of the intensity setting and a transmittance associated with the modified video image; and adjust color content in the video image based on the intensity setting to maintain the color associated with the video image even as the spectrum associated with the light sources varies with the intensity setting. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A system, comprising:
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an input node configured to receive video signals associated with a video image; an extraction circuit electrically coupled to the input interface, the extraction circuit operative to calculate a brightness metric associated with at least a portion of the video image based on the received video signals and operative to determine an intensity setting of a light source based on the brightness metric, the light source configured to illuminate a display that is configured to display video images; an adjustment circuit electrically coupled to the extraction circuit, the adjustment circuit configured to modify a brightness of pixels in at least a portion of the video image based on the brightness metric to maintain a product of the intensity setting and a transmittance associated with the modified video image, and configured to adjust color content in the video image based on the intensity setting to maintain the color associated with the video image even as the spectrum associated with the light sources varies with the intensity setting; and an output node electrically coupled to the adjustment circuit, the output node configured to output the video signals.
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17. A system, comprising one or more integrated circuits, wherein the one or more integrated circuits are configured to:
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receive a video image; and jointly modify brightness values of pixels in at least a portion of the video image and an intensity setting of a light source to maintain light output from a display while reducing power consumption by the light source, the light source configured to illuminate the display that is configured to display video images; and adjust color content in the video image to correct for a dependence of a spectrum of the light source on the intensity setting.
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18. A method for adjusting a video image, comprising:
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receive a video image; and determine an intensity setting of a light source based on at least a portion of the video image, the light source configured to illuminate a display that is configured to display video images; modify brightness values of pixels in at least a portion of the video image to maintain a product of the intensity setting and a transmittance associated with the modified video image; and adjust color content in the video image based on the intensity setting to maintain the color associated with the video image even as the spectrum associated with the light sources varies with the intensity setting.
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19. A method for adjusting a video image, comprising:
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receiving a video image; and jointly modifying brightness values of pixels in at least a portion of the video image and an intensity setting of a light source to maintain light output from a display while reducing power consumption by the light source, the light source configured to illuminate the display that is configured to display video images; and adjusting color content in the video image to correct for a dependence of a spectrum of the light source on the intensity setting.
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20. A computer-program product for use in conjunction with a computer system, the computer-program product comprising a computer-readable storage medium and a computer-program mechanism embedded therein for adjusting a video image, the computer-program mechanism comprising:
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instructions for receiving a video image; and instructions for jointly modifying brightness values of pixels in at least a portion of the video image and an intensity setting of a light source to maintain light output from a display while reducing power consumption by the light source, the light source configured to illuminate the display that is configured to display video images; and instructions for adjusting color content in the video image to correct for a dependence of a spectrum of the light source on the intensity setting.
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21. A computer system to scale a brightness of a portion of a video image, comprising:
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a processor; memory; a program module, wherein the program module is stored in the memory and configurable to be executed by the processor, the program module including; instructions for receiving a video image; and instructions for jointly modifying brightness values of pixels in at least a portion of the video image and an intensity setting of a light source to maintain light output from a display while reducing power consumption by the light source, the light source configured to illuminate the display that is configured to display video images; and instructions for adjusting color content in the video image to correct for a dependence of a spectrum of the light source on the intensity setting.
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22. A computer system configured to scale a brightness of a portion of a video image, comprising:
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a processor; a memory; an instruction fetch unit within the processor configured to fetch; instructions for receiving a video image; and instructions for jointly modifying brightness values of pixels in at least a portion of the video image and an intensity setting of a light source to maintain light output from a display while reducing power consumption by the light source, the light source configured to illuminate the display that is configured to display video images; and instructions for adjusting color content in the video image to correct for a dependence of a spectrum of the light source on the intensity setting; and an execution unit within the processor configured to execute the instructions for receiving the video image, the instructions for jointly modifying the brightness values of the pixels and the intensity setting, and the instructions for adjusting the color content.
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23. An integrated circuit, comprising one or more sub-circuits, wherein the one or more sub-circuits are configured to:
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receive a video image; and determine an intensity setting of a light source based on at least a portion of the video image, the light source configured to illuminate a display that is configured to display video images; modify brightness values of pixels in at least a portion of the video image to maintain a product of the intensity setting and a transmittance associated with the modified video image; and adjust color content in the video image based on the intensity setting to maintain the color associated with the video image even as the spectrum associated with the light sources varies with the intensity setting.
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24. An integrated circuit, comprising one or more sub-circuits, wherein the one or more sub-circuits are configured to:
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receive a video image; and jointly modify brightness values of pixels in at least a portion of the video image and an intensity setting of a light source to maintain light output from a display while reducing power consumption by the light source, the light source configured to illuminate the display that is configured to display video images; and adjust color content in the video image to correct for a dependence of a spectrum of the light source on the intensity setting.
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25. A portable device, comprising:
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a display; a light source configured to output light; an attenuation mechanism configured to modulate the output light incident on the display, the display configured to display a video image; and one or more integrated circuits, wherein the one or more integrated circuits are configured to; receive the video image; and determine an intensity setting of the light source based on at least a portion of the video image; modify brightness values of pixels in at least a portion of the video image to maintain a product of the intensity setting and a transmittance associated with the modified video image; and adjust color content in the video image based on the intensity setting to maintain the color associated with the video image even as the spectrum associated with the light sources varies with the intensity setting.
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Specification