Image dynamic range compensation device and method
AssigneeSamsung Display Co., Ltd.
InventorKazuhiro Matsumoto
Life of this patent
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Abstract
Provided is an image processing device including an obtaining unit configured to obtain image data, a first modulator that multiplies a first coefficient by a reflection-absorption component, which is based on a difference between a pixel value of a pixel of interest among the image data and an illumination component of the pixel of interest, to modulate the reflection-absorption component, a second modulator that multiplies a second coefficient by the illumination component to modulate the illumination component, and an adding unit that adds the reflection-absorption component after modulation to the illumination component after modulation.
Claims20
An image processing device comprising:
- an input configured to receive dynamic range restricted image intensity data from an image acquisition device;
- a filter connected to the input and configured to extract an illumination component from the intensity data;
- an amplification factor calculator connected to the filter and configured to provide at least a first coefficient;
- a first modulator connected to the amplification factor calculator and configured to multiply at least the first coefficient by at least one component of the intensity data;
- and
- an output connected to the first modulator and configured to provide modulated data as dynamic range compensated image intensity data for display.
The image processing device of claim of 3, wherein the third coefficient is preset based on an approximate value of a function that represents a relation between the illumination component and the illumination component after modulation.
An image processing method comprising:
- obtaining image data from an image acquisition device;
- multiplying a first coefficient by a reflection-absorption component, which is based on a difference between a pixel value of a pixel of interest among the image data and an illumination component of the pixel of interest, to modulate the reflection-absorption component;
- multiplying a second coefficient by the illumination component to modulate the illumination component;
- adding the reflection-absorption component after modulation to the illumination component after modulation;
- and
- displaying the modulated data as a dynamic range compensated image.
A computer program that is recorded on a non-transitory recording medium and linked to a computer to be configured to execute:
- obtaining image data from an image acquisition device;
- multiplying a first coefficient by a reflection-absorption component, which is based on a difference between a pixel value of a pixel of interest among the image data and an illumination component of the pixel of interest, to modulate the reflection-absorption component;
- multiplying a second coefficient by the illumination component to modulate the illumination component;
- adding the reflection-absorption component after modulation to the illumination component after modulation;
- and
- displaying the modulated data as a dynamic range compensated image.
Dependencies are inferred from the claim text.