Line Scan Sensor Pixel Correction for Color Fringing
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Solution Overview
Problem
Existing line array cameras using red, green, and blue photosensitive chips in line scan sensors often result in color edges in determined images due to single white light illumination, leading to inaccurate pixel data determination.
Innovation Solution
A method involving multi-time scanning with three photosensitive chips at different positions, using color correction coefficients to determine pixel data, ensuring accurate scanning positions and eliminating color fringing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If line scan sensor uses single white light illumination with three photosensitive chips, then wide coverage and compact structure are achieved, but color edge occurs in determined image
Solution Approach 1:
The patent applies preliminary action by performing multiple scanning operations before final pixel data determination. Specifically, the line scan sensor scans the target pixel row multiple times (at least twice) to acquire multiple sets of photosensitive pixel data, and then uses these accumulated data to determine the final pixel values, thereby eliminating color edges while maintaining wide coverage capability
Solution Approach 2:
The patent implements continuity of useful action through repeated scanning operations. The line scan sensor continuously scans the target pixel row multiple times, and the processor accumulates the photosensitive pixel data from each scan. This continuous scanning process ensures that sufficient data is collected to eliminate color fringing effects while maintaining the wide coverage advantage of the line scan architecture
2Volume of moving object
If line scan sensor performs linear scanning with three rows of photosensitive chips, then space-saving design is achieved, but color fringing interferes with image determination
Solution Approach 1:
The patent applies preliminary action by performing multiple scanning operations before final pixel data determination. Specifically, the line scan sensor scans the target pixel row multiple times (at least twice) to acquire multiple sets of photosensitive pixel data, and then uses these accumulated data to determine the final pixel values, thereby eliminating color edges while maintaining wide coverage capability
Solution Approach 2:
The patent implements feedback through the processor's analysis of multiple scanned datasets. The processor compares and analyzes the photosensitive pixel data from multiple scanning operations to identify and eliminate color fringing effects, using the feedback from repeated measurements to refine the final pixel data determination and improve measurement precision
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
The method ensures accurate pixel data determination by eliminating color fringing, resulting in more precise image data without color edges.
Implementation Method 1
a line scan sensor, where the line scan sensor includes three photosensitive chips arranged in parallel, the three photosensitive chips respectively correspond to three colors
Data Source
AI summary
A pixel data determination method and apparatus, and an electronic device are provided. The method includes: sending a pixel data collection instruction to a line scan sensor; receiving first photosensitive pixel data corresponding to a target pixel row sent by the line scan sensor; cyclically and sequentially sending a preset pixel row movement instruction and the pixel data collection instruction to the line scan sensor until receiving second photosensitive pixel data and third photosensitive pixel data corresponding to the target pixel row sent by the line scan sensor; and determining target pixel data corresponding to the target pixel row based on a color correction coefficient corresponding to the line scan sensor, as well as the first photosensitive pixel data, the second photosensitive pixel data, and the third photosensitive pixel data corresponding to the target pixel row.