Image sensing device for detecting and correcting color noise of a target pixel value and operating method thereof
AssigneeSK hynix Inc.
InventorJi Hee Han
Life of this patent
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Abstract
Disclosed is an image sensing device and an operating method thereof. The image sensing device may include an analyzer suitable for analyzing a state of each of multiple kernels based on system information and a plurality of pixel values, a detector suitable for detecting color noise of a target pixel value among pixel values included in a target kernel among the multiple kernels, according to the analysis result of the analyzer, and a corrector suitable for correcting the target pixel value according to the detection result of the detector.
Claims19
An image sensing device comprising:
- an analyzer suitable for analyzing a state of each of multiple kernels based on an analog gain value and a plurality of pixel values;
- a detector suitable for detecting color noise of a target pixel value among pixel values included in a target kernel among the multiple kernels, according to the analysis result of the analyzer;
- and
- a corrector suitable for correcting the target pixel value according to the detection result of the detector.
An image sensing device comprising:
- an image sensor including a pixel array in which first pixels, second pixels and third pixels are arranged in a predetermined color pattern, each of the first pixels having a first color filter, each of the second pixels having a second color filter and each of the third pixels having a third color filter, and suitable for generating a plurality of pixel values corresponding to the color pattern;
- and
- an image processor suitable for detecting color noise of each of multiple kernels based on an analog gain value and the plurality of pixel values, and detecting color noise of a target pixel value included in a target kernel among the multiple kernels by using all pixel values included in the target kernel.
An operating method of an image sensing device, comprising:
- determining saturation and texture of each of multiple kernels;
- detecting color noise of a target pixel value among pixel values included in a target kernel among the multiple kernels when the target kernel is a low saturation region, not a high saturation region, and a flat region;
- and
- correcting the color noise of the target pixel value.
An image sensing device comprising:
- an image sensor including a pixel array suitable for generating a plurality of pixel values corresponding to a set frame;
- and
- an image processor suitable for:
- determining whether the frame has low illuminance;
- when it is determined that the frame has the low illuminance, selecting pixel values corresponding to a target kernel among the frame;
- determining whether the target kernel is a flat region and a low saturation region;
- when it is determined that the target kernel is the flat region and the low saturation region, detecting whether a target pixel value of the target kernel corresponds to color noise based on other pixel values of the target kernel, which have other color channels different from a color channel of the target pixel value;
- and
- when it is detected that the target kernel corresponds to the color noise, correcting the target pixel value using the other pixel values.
Dependencies are inferred from the claim text.