Pixel Mixture Correction for Color Image Data Contamination
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Solution Overview
Problem
In solid-state electronic imaging devices, the increased pixel density leads to light mixture between adjacent photodiodes, causing difficulties in accurately reproducing colors, as existing techniques fail to effectively correct for light mixture during the read process and pixel unevenness.
Innovation Solution
A color image data mixture correction device and method that mixes data from pixels of the same color using a same-color pixel data mixture device, followed by a mixture correction process to reduce the amount of mixed data, utilizing photoelectric conversion elements with color filters arranged in a repetitive pattern, such as a Bayer array, to generate reduced color image data while correcting for light mixture.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If pixel density is increased to improve resolution, then image detail is improved, but light mixture between adjacent photodiodes occurs causing color reproduction deterioration
Solution Approach 1:
The patent segments the pixel data processing into distinct stages: first mixing same-color pixels within a pixel block, then performing mixture correction on the resulting reduced data. This segmentation allows independent optimization of each processing stage to resolve the contradiction between high pixel density and color accuracy.
Solution Approach 2:
The patent introduces an intermediary processing step where same-color pixel data is mixed to create reduced color image data, which then serves as the basis for mixture correction. This intermediary stage enables the system to handle light mixture effects systematically while maintaining the benefits of high pixel density.
2Productivity
If same-color pixel data mixing is performed to reduce data amount, then data processing efficiency is improved, but color mixture correction becomes more difficult
Solution Approach 1:
The patent performs preliminary mixing of same-color pixel data before the mixture correction step. By pre-grouping and mixing same-color pixels, the system reduces the overall data volume that requires correction processing, thereby maintaining efficiency while enabling accurate color mixture correction on the reduced dataset.
Solution Approach 2:
The patent changes the parameter of data representation by mixing same-color pixels to create reduced color image data. This parameter transformation reduces data dimensionality while preserving essential color information, making subsequent mixture correction more manageable without sacrificing accuracy.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach effectively reduces the amount of mixed data, improving image quality by accurately correcting for light mixture between adjacent photoelectric conversion elements, thereby enhancing the accuracy of color reproduction in solid-state electronic imaging devices.
Implementation Method 1
a plurality of photoelectric conversion elements having light receiving surfaces on which color filters with different filter characteristics are periodically formed
Data Source
AI summary
The deterioration of image quality due to the mixture of light during pixel mixture is prevented. A filter that transmits a green light component is formed on a light receiving surface of a photoelectric conversion element and a filter that transmits a red light component is formed on a light receiving surface of a photoelectric conversion element. Light which is vertically incident on the filter is incident on the corresponding photoelectric conversion element. However, light which is obliquely incident on the filter is mixed with a photoelectric conversion element adjacent to the corresponding photoelectric conversion element. When pixel mixture is performed, mixed pixel data is reduced from the data of a mixed pixel to perform mixture correction.