Sensor Chip Dual-Speed Readout for Real-Time Image Correction
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Solution Overview
Problem
Existing imaging technologies face challenges in acquiring high-quality images due to decreased frame rates when correction data is detected from acquired frames, leading to reduced spatial resolution and increased power consumption, especially when high-speed imaging is required.
Innovation Solution
An imaging device with a sensor chip capable of dual speed stream (DSS) driving, which simultaneously outputs full-angle-of-view images and region-of-interest (ROI) images at different frame rates, allowing for real-time correction parameter calculation and application to improve image quality without decreasing the final frame rate.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If correction data is detected from acquired image data and fed back to correct the image, then image quality is improved, but the frame rate of the corrected image decreases
Solution Approach 1:
The pixel array is divided into a first region (full angle of view) and a second region (specific region). The first region reads at a first frame rate while the second region reads at a second frame rate higher than the first. This segmentation allows correction data to be acquired from the high-frame-rate second region without reducing the frame rate of the full-angle images from the first region.
Solution Approach 2:
Different frame rates are applied to different regions of the pixel array. The second region (specific region) operates at a higher frame rate to provide correction data, while the first region (full angle of view) operates at a lower frame rate for normal imaging. This local differentiation of reading characteristics enables simultaneous achievement of high image quality and maintained frame rate.
2Manufacturing precision
If pixel signals of the entire pixel region are read at a high frame rate to maintain image quality, then spatial resolution is maintained, but power consumption increases
Solution Approach 1:
The pixel array is segmented into two regions with different reading characteristics. Only the second region (specific region) reads at the high second frame rate, while the first region (full angle of view) reads at the lower first frame rate. This reduces the total number of high-speed reads required, thereby reducing power consumption while maintaining spatial resolution where needed.
Solution Approach 2:
High frame rate reading is applied locally only to the second region where correction data is needed, rather than uniformly across the entire pixel array. This localized high-performance reading maintains spatial resolution in critical areas while reducing overall power consumption.
Data Source
AI summary
The present disclosure relates to an imaging device, a sensor chip, and a processing circuit capable of more suitably acquiring a high-quality image.The sensor chip includes a pixel array unit enabling simultaneous output of a full-angle-of-view image of one frame and region images of a plurality of frames by reading pixel signals of an entire pixel region at a first frame rate and reading pixel signals of a specific region in the pixel region at a second frame rate higher than the first frame rate, a parameter calculation unit calculates a correction parameter for correcting the full-angle-of-view image on the basis of the region images of the plurality of frames, and a processing circuit includes a processing unit which outputs the full-angle-of-view image reflecting correction based on the correction parameter to a subsequent stage. The present disclosure can be applied to an imaging device which captures and outputs a moving image.