Image Processing Device Adaptive Offset Encoding
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Solution Overview
Problem
High-digital gain imaging leads to signal value deviations during encoding and decoding, particularly due to the amplification of pixel signals, which affects the quality of decoded images and data accuracy.
Innovation Solution
An image processing device and method that includes an adaptive processing section for images with signal amplification, followed by simple encoding and decoding, using techniques such as random offset addition, offset subtraction, or quantization value range adjustment to mitigate signal value deviations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If high-digital gain imaging is used to amplify pixel signals, then signal amplification is achieved, but signal value deviation occurs during encoding and decoding
Solution Approach 1:
The patent applies preliminary action by adding random offsets to pixel values before encoding. This preprocessing step modifies the amplified signal in advance to prevent quantization errors from causing systematic deviations during subsequent encoding and decoding operations, thereby maintaining signal integrity while preserving the amplification effect.
Solution Approach 2:
The patent changes parameters by adjusting quantization values and applying offset additions to the amplified signal. By modifying the quantization parameters and signal values before encoding, the system maintains the benefits of high-digital gain imaging while correcting the signal value deviations that would otherwise occur during compression and decompression.
2Productivity
If simple encoding is applied to amplified images, then encoding speed is improved, but quantization errors increase
Solution Approach 1:
The patent applies preliminary action by adding random offsets to pixel values before simple encoding. This preprocessing step modifies the amplified signal in advance to prevent quantization errors from causing systematic deviations during subsequent encoding and decoding operations, thereby maintaining signal integrity while preserving the amplification effect.
Solution Approach 2:
The patent introduces random offsets as an intermediary element between the amplified signal and the simple encoding process. These offsets act as a mediator that distributes quantization errors more uniformly, preventing systematic deviations while allowing simple encoding to maintain its speed advantages.
3Quantity of substance
If DPCM encoding with refinement data is used, then compression ratio is improved, but pixel deviation occurs in decoded images
Solution Approach 1:
The patent applies preliminary action by adding random offsets to pixel values before DPCM encoding. This preprocessing step modifies the amplified signal in advance to prevent quantization errors from causing systematic deviations during subsequent encoding and decoding operations, thereby maintaining signal integrity while preserving the amplification effect.
Data Source
AI summary
The present disclosure relates to an image processing device and a method thereof, an imaging element, and an imaging device in which a signal value deviation generated through encoding and decoding of an amplified signal group can be restrained. Adaptive processing is executed on an image in which signal amplification has been executed, and the resultant image is encoded. For example, an offset value that is randomly set within a value range that depends on a gain value of the signal amplification executed on the image is added to each pixel value of the image, and then, the resultant image is encoded. The present disclosure is applicable to an image processing device, an image encoding device, an image decoding device, an imaging element, or an imaging device, for example.