HDR Imaging Pixel Array Segmentation for Motion Artifact Reduction
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Solution Overview
Problem
Imaging systems face challenges in generating high dynamic range (HDR) images with reduced artifacts when objects are in motion, often resulting in decreased image resolution during the process of capturing images at different exposure times.
Innovation Solution
The proposed solution involves an imaging system with a pixel array and processing circuitry that controls first and second pixels based on distinct exposure times, generating HDR images by combining first and second Bayer images, where the number of first pixels is greater than second pixels, to minimize artifacts and maintain high resolution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If images are captured at different exposure times to generate HDR images, then the dynamic range of the image is improved, but artifacts occur when objects move during capture
Solution Approach 1:
The pixel array is divided into first pixels and second pixels with different exposure times. The processing circuitry separately processes first Bayer image data from first pixels and second Bayer image data from second pixels, then combines them to generate HDR image data. This segmentation allows different regions to be optimized for different exposure requirements, reducing motion artifacts while maintaining extended dynamic range.
2Illumination intensity
If images are captured at different exposure times to generate HDR images, then the dynamic range of the image is improved, but the resolution of the image decreases
Solution Approach 1:
The processing circuitry merges first Bayer image data from first pixels captured at a first exposure time with second Bayer image data from second pixels captured at a second exposure time to generate combined HDR image data. This merging process maintains high resolution by utilizing data from all pixels while achieving extended dynamic range through the combination of different exposure times.
Data Source
AI summary
An imaging system for generating a high dynamic range (HDR) image includes a pixel array that includes first pixels and second pixels, a driver circuit configured to control the first pixels based on a first exposure time and control the second pixels based on a second exposure time, an output circuit configured to output first pixel values of the first pixels and second pixel values of the second pixels from the pixel array, and a processing device configured to generate the HDR image based on a first Bayer image and a second Bayer image, where the first Bayer image is generated based on the first pixel values and the second Bayer image is generated based on the second pixel values and third pixel values of the first Bayer image. The quantity of pixels of the first pixels may be greater than the quantity of pixels of the second pixels.