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US 8,134,549 B2Granted
Image processing apparatus and method of reducing power consumption of self-luminous display
AssigneeSamsung Electronics Co., Ltd.
InventorsYoung-ran Han, Ho-young Lee, Du-sik Park
Life of this patent
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Abstract
An image processing apparatus and a method to reduce power consumption of a self-luminous display. The image processing apparatus includes a parameter selection unit to select a parameter to adjust a degree to which power consumption is reduced; a scale factor setting unit to extract a high-frequency component of a current pixel in an input image and to set a scale factor according to the selected parameter and a size of the extracted high-frequency component; and a multiplier to multiply the current pixel by the set scale factor and to output a result of the multiplication.
Claims39
An image processing apparatus to reduce power consumption of a self-luminous display, the apparatus comprising:
- a parameter selection unit to select a parameter to adjust a degree to which power consumption is reduced;
- a scale factor setting unit to extract a high-frequency component of a current pixel in an input image and to set a scale factor according to the selected parameter and a size of the extracted high-frequency component based on a human visual system;
- and
- a multiplier to multiply the current pixel by the set scale factor and to output a result of the multiplication, wherein the parameter is one of a frequency parameter, a spatial parameter, a temporal parameter and a luminance parameter,
- wherein the scale factor decreases as the size of the high-frequency component and the parameter increase.
2 more elements
An image processing apparatus to reduce power consumption of a self-luminous display, the apparatus comprising:
- a parameter selection unit to select a parameter to adjust a degree to which power consumption is reduced;
- a scale factor setting unit to extract a high-frequency component of a current pixel in an input image and to set a scale factor according to the selected parameter and a size of the extracted high-frequency component;
- and
- a multiplier to multiply the current pixel by the set scale factor and to output a result of the multiplication, wherein a size of the high-frequency component is a difference between a luminance component of the current pixel and a luminance component obtained after a low pass filter (LPF) is applied to the luminance component of the current pixel.
1 more element
An image processing apparatus to reduce power consumption of a self-luminous display, the apparatus comprising:
- a parameter selection unit to select a parameter to adjust a degree to which power consumption is reduced;
- a scale factor setting unit to calculate a distance between a current pixel in an input image and a center of the input image and to set a scale factor according to the selected parameter and the calculated distance based on a human visual system;
- and
- a multiplier to multiply the current pixel by the set scale factor and to output a result of the multiplication, wherein the parameter comprises one of a frequency parameter that determines a level of a high-frequency component to be extracted from the input image, a spatial parameter that determines the adjustment to the luminance component of the input image by calculating positions of respective pixels with respect to a distance between the respective pixels and a predetermined point in the input image, a temporal parameter that determines the adjustment to the luminance component of the input image by calculating a luminance gradient of respective pixels, and a luminance parameter that increases and decreases the scale factors based on the relative darkness of the input image.
1 more element
An image processing apparatus to reduce power consumption of a self-luminous display, the apparatus comprising:
- a parameter selection unit to select a parameter to adjust a degree to which power consumption is reduced;
- a scale factor setting unit to calculate a distance between a current pixel in an input image and a center of the input image and to set a scale factor according to the selected parameter and the calculated distance;
- and
- a multiplier to multiply the current pixel by the set scale factor and to output a result of the multiplication, wherein the scale factor decreases as the distance and the parameter increase and the scale factor is calculated by subtracting the result of multiplying the distance by the parameter from a predetermined constant.
1 more element
An image processing apparatus to reduce power consumption of a self-luminous display, the apparatus comprising:
- a parameter selection unit to select a parameter to adjust a degree to which power consumption is reduced for a display of an input image;
- a scale factor setting unit to calculate a temporal gradient of a luminance of a current pixel in the input image and to set a scale factor according to the selected parameter and the calculated temporal gradient based on a human visual system;
- and
- a multiplier to multiply the current pixel by the set scale factor and to output a result of the multiplication, wherein the parameter is one of a frequency parameter, a spatial parameter, a temporal parameter and a luminance parameter,
- wherein the scale factor decreases as the temporal gradient and the parameter increase.
2 more elements
An image processing apparatus to reduce power consumption of a self-luminous display, the apparatus comprising:
- a parameter selection unit to select a parameter to adjust a degree to which power consumption is reduced for a display of an input image;
- a scale factor setting unit to calculate a temporal gradient of a luminance of a current pixel in the input image and to set a scale factor according to the selected parameter and the calculated temporal gradient;
- and
- a multiplier to multiply the current pixel by the set scale factor and to output a result of the multiplication, wherein the scale factor decreases as the temporal gradient and the parameter increase and the scale factor is calculated by subtracting a result of exponentiating the temporal gradient and the parameter from a predetermined constant.
1 more element
An image processing apparatus to reduce power consumption of a self-luminous display, the apparatus comprising:
- a parameter selection unit to select a parameter to adjust a degree to which power consumption is reduced for a display of an input image;
- a scale factor setting unit to extract a luminance component of a current pixel in the input image and to set a scale factor according to the selected parameter and a size of the extracted luminance component based on a human visual system;
- and
- a multiplier to multiply the current pixel by the set scale factor and to output a result of the multiplication, wherein the parameter is one of a frequency parameter, a spatial parameter, a temporal parameter and a luminance parameter,
- wherein the scale factor increases as the size of the luminance component and the parameter increase.
2 more elements
An image processing method to reduce power consumption of a self-luminous display, the method comprising:
- selecting a parameter to allow for an adjustment of a degree to which power consumption is reduced for a display of an input image;
- extracting a high-frequency component of a current pixel in the input image;
- setting a scale factor according to the selected parameter and a size of the extracted high-frequency component based on a human visual system;
- multiplying the current pixel by the set scale factor;
- and
- outputting a result of the multiplication, wherein the parameter is one of a frequency parameter, a spatial parameter, a temporal parameter and a luminance parameter,
- wherein the scale factor decreases as the size of the high-frequency component and the parameter increase.
4 more elements
An image processing method to reduce power consumption of a self-luminous display, the method comprising:
- selecting a parameter to allow for an adjustment of a degree to which power consumption is reduced for a display of an input image;
- calculating a distance between a current pixel in the input image and a center of the input image;
- setting a scale factor according to the selected parameter and the calculated distance based on a human visual system;
- multiplying the current pixel by the set scale factor;
- and
- outputting a result of the multiplication, wherein the parameter comprises one of a frequency parameter that determines a level of a hiqh-frequency component to be extracted from the input image, a spatial parameter that determines the adjustment to the luminance component of the input image by calculating positions of respective pixels with respect to a distance between the respective pixels and a predetermined point in the input image, a temporal parameter that determines the adjustment to the luminance component of the input image by calculating a luminance gradient of respective pixels, and a luminance parameter that increases and decreases the scale factors based on the relative darkness of the input image.
3 more elements
An image processing method to reduce power consumption of a self-luminous display, the method comprising:
- selecting a parameter to allow for an adjustment of a degree to which power consumption is reduced for a display of an input image;
- calculating a temporal gradient of luminance of a current pixel in the input image;
- setting a scale factor according to the selected parameter and the calculated temporal gradient based on a human visual system;
- multiplying the current pixel by the set scale factor;
- and
- outputting a result of the multiplication, wherein the parameter is one of a frequency parameter, a spatial parameter, a temporal parameter and a luminance parameter,
- wherein the scale factor decreases as the temporal gradient and the parameter increase.
4 more elements
An image processing method to reduce power consumption of a self-luminous display, the method comprising:
- selecting a parameter to allow for an adjustment of a degree to which power consumption is reduced;
- extracting a luminance component of a current pixel in an input image and setting a scale factor according to the selected parameter and a size of the extracted luminance component based on a human visual system;
- multiplying the current pixel by the set scale factor;
- and
- outputting a result of the multiplication, wherein the parameter is one of a frequency parameter, a spatial parameter, a temporal parameter and a luminance parameter,
- wherein the scale factor increases as the size of the luminance component and the parameter increase.
3 more elements
An image adjustment method, comprising:
- extracting a luminance component of an input image;
- following a classification of the input image, uniformly scaling down a level or the luminance component of the input image if the input image is a graphic image having only a single color and, if the input image is not the graphic image, selecting an appropriate parameter according to whether the input image is a dark image, a bright image, or a general image;
- calculating individual scale factors to adjust the luminance component of the input image using the selected parameter;
- setting a final scale factor by multiplying the calculated individual scale factors by one another;
- multiplying the set final scale factor by the luminance component of the input image;
- and
- outputting a changed luminance component to reduce a power consumption to display the image.
4 more elements
Dependencies are inferred from the claim text.