Method of generating a mid-resolution image
By applying specific pulse signals to the pixel units of the image sensor and sampling the difference, a medium-resolution image is generated, which solves the problem of low SNR of the image sensor under low light conditions and improves the image quality.
CN122160640APending Publication Date: 2026-06-05OMNIVISION TECHNOLOGIES INC
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- OMNIVISION TECHNOLOGIES INC
- Filing Date
- 2025-12-01
- Publication Date
- 2026-06-05
AI Technical Summary
Technical Problem
In low-light conditions, existing high-resolution image sensors produce images with low signal-to-noise ratios (SNR), resulting in degraded image quality, and image merging techniques further reduce image resolution.
Method used
By applying pulse signals in a specific sequence to the pixel units of an image sensor and sampling to generate signal differences, and then combining the pixel signal difference processing, a medium-resolution image is generated.
Benefits of technology
A balance between image resolution and signal-to-noise ratio (SNR) was achieved under low-light conditions, thus improving image quality.
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Smart Images
Figure CN122160640A_ABST
Abstract
A method for generating image data from a pixel cell of an image sensor, including applying a pulse to a reset gate of the pixel cell, the pixel cell including a zeroth pixel and a first pixel; generating a signal from the pixel cell by sequentially applying a pulse to a zeroth transfer gate of the zeroth pixel and a first transfer gate of the first pixel, respectively; and refraining from applying a pulse to the reset gate of the pixel cell until each of the zeroth transfer gate and the first transfer gate has been applied a pulse; sampling the signal to obtain signals S0 and S1 and a reset signal RST; determining a merged signal as a difference between the signal S1 and the reset signal RST; determining a pixel signal PD0 output from the zeroth pixel as a difference between the signal S0 and the reset signal RST; and determining a pixel signal PD1 output from the first pixel as a difference between the signal S1 and the signal S0.
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