Imaging Device Noise Reduction Offset Segmentation
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Solution Overview
Problem
Existing imaging devices face increased complexity and storage requirements due to the need for adjusting noise reduction settings based on both Gain value and temperature of the image sensor, leading to increased information storage and computational load.
Innovation Solution
An imaging device that includes a Gain value acquisition unit, a temperature value acquisition unit, and a signal processing unit that calculates an offset amount for the Gain value based on temperature, allowing for interpolation of set values to optimize noise reduction processing, thereby reducing the amount of information stored and computational load.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If optimum set values corresponding to all adjustment values are held in a storage element, then noise reduction accuracy is improved, but the amount of stored information becomes enormous
Solution Approach 1:
The patent segments the set values into two parts: a base set value determined by Gain value, and a temperature-dependent offset value. This segmentation allows the system to store only the offset values in the storage element rather than complete set values for all combinations of Gain and temperature, significantly reducing storage requirements while maintaining noise reduction accuracy.
Solution Approach 2:
The patent changes the parameter stored in the storage element from complete set values to offset values, which are corrections to be applied to base set values. This parameter transformation reduces the amount of stored information while preserving the ability to achieve accurate noise reduction across different operating conditions.
2Quantity of substance
If set values are stored for several points at predetermined intervals with respect to the Gain value, then storage amount is reduced, but interpolation operation amount increases
Solution Approach 1:
The patent extracts the temperature-dependent component from the complete set value and stores it separately as an offset value. This extraction simplifies the interpolation process because the offset values represent small corrections that vary more predictably with temperature, reducing the computational complexity of interpolation operations.
3Measurement precision
If an interlocking mechanism similar to interlocking of the Gain value is included according to the temperature, then noise reduction accuracy is improved, but the information amount of the set value held in the storage element increases and computation becomes complicated
Solution Approach 1:
The patent implements a dynamic adjustment mechanism where the base set value (determined by Gain) is dynamically corrected by adding a temperature-dependent offset value. This dynamic approach allows the system to adapt to temperature changes without requiring complete re-storage of set values for all conditions, maintaining accuracy while controlling complexity.
Solution Approach 2:
The patent introduces an intermediary offset value that mediates between the base set value and the final adjusted set value. This offset value serves as a compact representation of temperature effects, allowing the system to achieve accurate temperature compensation without directly storing or computing complex temperature-dependent set values.
Data Source
AI summary
The present disclosure relates to an imaging device, an imaging method, an electronic device, and a signal processing device capable of reducing an amount of information of a set value to be stored in an image processing block for reducing noise according to a noise amount and an interpolation operation amount thereof. Signal processing is performed on an image captured by an image sensor on the basis of a Gain value of the image sensor offset according to a temperature value of the image sensor. The present disclosure can be applied to an imaging device.