Streaking Correction Circuit Region-Specific Noise Suppression
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Solution Overview
Problem
Conventional streaking correction circuits are unable to effectively suppress distinctive offset or noise in captured images due to their inability to calculate correction values exclusively for specific regions, leading to incomplete correction.
Innovation Solution
A streaking correction circuit that generates a correction signal based on signals from light-shielded pixels at the edge portions of a pixel array, divides the captured image into regions relative to singular points, and performs a correction process using these signals for each divided region, allowing for tailored noise suppression.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a conventional streaking correction circuit calculates a correction value by averaging between left and right light-shielded pixels or using linear interpolation, then the correction process is simple and fast, but it is impossible to calculate a correction value exclusively for a certain region in the image capture screen, resulting in incomplete correction of distinctive offset or noise
Solution Approach 1:
The captured image is divided into a plurality of regions relative to the position of a singular point. The correction signal generation section generates a correction signal for each divided region by using signals of light-shielded pixels in that specific region. This segmentation allows region-specific correction values to be calculated, effectively suppressing distinctive offset or noise in different areas of the image capture screen while maintaining a manageable correction process structure.
2Reliability
If a single correction value is calculated for the entire image, then the correction process is computationally efficient, but distinctive offset or noise in specific regions cannot be effectively suppressed
Solution Approach 1:
The correction signal generation section generates correction signals that are specific to each divided region based on the signals of light-shielded pixels in that region. This local quality approach ensures that distinctive offset or noise in specific regions is effectively suppressed by using region-appropriate correction values, while the processing remains efficient by using a systematic region-division approach rather than fully independent processing for each pixel.
Data Source
AI summary
A streaking correction circuit of the present disclosure includes a correction signal generation section and a correction process section. The correction signal generation section generates a correction signal on the basis of signals of light-shielded pixels of light-shielded portions provided at edge portions of a pixel array section having pixels, each including a light reception section, arranged in a matrix pattern. The correction process section performs a correction process on signals of effective pixels of the pixel array section by using the correction signal generated by the correction signal generation section. Then, the correction signal generation section divides a captured image into a plurality of regions relative to a position of a singular point in the captured image and generates a correction signal for each divided region by using signals of the light-shielded pixels. The correction process section performs the correction process by using the correction signal generated for each divided region.